Journal articles: 'Aerial yam'

1

Umoh, Enobong Okon, and Sunday Peter Ukwo. "Assessment of Some Anti-Nutritional Factors in Extruded Soybean and Aerial Yam Flour Blend." African Journal of Agricultural Science and Food Research 16, no. 1 (2024): 40–50. http://dx.doi.org/10.62154/ajasfr.2024.016.010389.

Full text

Abstract:

This study assesses the levels of some anti-nutritional factors (ANFs) in extrudates produced from the blend of soybean and aerial yam flours. The soybean and aerial yam flours were blended in a ratio of 3:1 (75% soybean flour, 25% aerial yam flour). The blended soybean and aerial yam flours were then extruded using a laboratory scale single-screw extruder at 33% feed moisture content; 110 barrel temperature and 130 rpm screw speed. The results of the laboratory analysis of the extrudates show that the levels of anti-nutritional factors were 73.80 mg/100g of sample for oxalates; 1.81 mg/100g of sample for tannin; 25.39 mg/100g of sample for phytate; 2.22 mg/100g of sample for hydrogen cyanide (HCN); and 1.64% for alkaloids. This study has shown that the levels of the anti-nutritional factors in the extrudates produced from soybean and aerial yam flours blend are minimal, and are below the FAO/WHO recommended safe level of toxicity to humans, and these anti-nutritional factors can be reduced to the level of non-toxicity, through extrusion processing technology.

APA, Harvard, Vancouver, ISO, and other styles

2

Anoshirike, Cyril, Elizabeth Chukwuemeka, Ngozi Nnam, Elizabeth Udenta, and Kelechi Anoshirike. "Effect of traditional food processing methods on the nutrient and anti-nutrient composition of aerial yam (Discorea bulbifera) flour." Journal of Dietitians Association of Nigeria 13, no. 2 (2023): 35–41. http://dx.doi.org/10.4314/jdan.v13i2.5.

Full text

Abstract:

Background: Aerial yam bulbil is one of the high-yielding food crops with quality nutrients. It has great potential to contribute to food security. However, this food crop is often underutilized. Therefore, the traditional methods of processing it into flour to increase food diversity, reduce post-harvest loss, improve nutrient quality, and reduces anti-nutrients are often unexploited in Nigeria. Objective: The study evaluated the effect of traditional food processing methods on the nutrient and anti-nutrient composition of Aerial Yam bulbil flours. Results: Germinated and fermented aerial yam flour had higher Protein (21.30%) and Fat (3.32%) and least carbohydrate (65.78%) and ash (3.95%), while sample UAYF and GFAYF had higher fibre (3.95%). GFAYF had higher zinc (0.13mg), iron (3.55mg), calcium (3.34mg), and phosphorous (84.39mg). GFAYF had reduced Phytate 4.73mg; Tannins (1.24mg); Hydrogen Cyanide (4.16mg); Oxalate (2.38mg); but increased Saponin (0.12mg) respectively. Conclusion: Combined germination and fermentation improved nutritional quality and decreased the anti-nutritional content of Aerial yam flour. This product can be used for the preparation of healthy and therapeutic dishes.

APA, Harvard, Vancouver, ISO, and other styles

3

Emmanuel, C. Nwadike., N. Abonyi. Matthew, T. Nwabanne. Joseph, and E. Ohale Pascal. "Optimization of Solar Drying of Blanched and Unblanched Aerial Yam using Response Surface Methodology." International Journal of Trend in Scientific Research and Development 4, no. 3 (2020): 659–66. https://doi.org/10.5281/zenodo.3892511.

Full text

Abstract:

This paper focuses on the application of response surface methodology RSM for the modelling and optimization of unblanched and blanched aerial yam drying using solar dryer. Mass in gram of the sample, slice thickness of the sample, and the airspeed of dryer are the independent variables considered, while the response of interest is the moisture content. RSM via central composite design CCD was used to optimize the variables of interest, while artificial neural network was used to validate the result. The result showed that a second order polynomial regression model could convincingly interpret the drying process of the aerial yam. A coefficient of determination R2 value of 0.9991 and 0.9828, model F value of 1186.03 and 60.75 for unblanched and blanched aerial yam respectively were obtained. P value 0.0001 , and low value of coefficient of variation 2.43 and 9.75 for unblanched and blanched sample indicated the fitness of the model. The optimum process variable obtained were 71 g, 3.2 mm and 1.5 m s, and 70 g, 3.0 mm and 1.5 m s for blanched and unblanched sample, respectively. Emmanuel C. Nwadike. | Matthew N. Abonyi. | Joseph T. Nwabanne. | Pascal E. Ohale "Optimization of Solar Drying of Blanched and Unblanched Aerial Yam using Response Surface Methodology" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30598.pdf Paper Url :https://www.ijtsrd.com/engineering/mechanical-engineering/30598/optimization-of-solar-drying-of-blanched-and-unblanched-aerial-yam-using-response-surface-methodology/emmanuel-c-nwadike

APA, Harvard, Vancouver, ISO, and other styles

4

Tewodros, Mulualem, Mohammed Hussein, and Diro Mulugeta. "Assessment of Indigenous Knowledge for Selection and Classification of Aerial Yam(Dioscorea Bulbifera (L.)) Accessions in South and Southwestern Ethiopia." Greener Journal of Plant Breeding and Crop Science 2, no. 2 (2014): 41–46. https://doi.org/10.15580/gjpbcs.2014.2.112913993.

Full text

Abstract:

Participatory evaluation on forty seven accessions of the aerial yam (Dioscorea bulbifera) was carried out in woldiya peasant association, which is a major D. bulbifera growing area of Jimma zone and near to Jimma Agricultural Research Center. The objectives of the study were to select aerial yam accessions based on key morphological traits and classification of D. bulbifera accessions based on maturity and farmers’ utilization options. Twenty households from the PA were selected based on consultation with key informants knowledgeable about the crop to determine yam selection, classification systems, and on different management practices through the entire growing period of aerial yam during the 2007/2008 growing season. The results of the evaluation indicated that from all accessions of D. bulbifera, 14 (29.78%), 22(46.8%) and 11(23.4%) of accessions are early, medium and late maturing respectively. Besides this, 62.5%, 25.0% and 12.5% of the farmers selected the late, medium and early maturing D. bulbifera accessions based on total yield (bulbils and tuber). Even if 62.5% of participated farmers preferred late maturing aerial yam accessions by total yield, most of the farmers selected the early and medium types due to the ease of harvesting and market value. Based on organoleptic test of tuber and bulbils, 60 and 85% of the farmers preferred late maturing accessions. On the bases of overall criteria, the late maturing accessions had the first ranks by farmers’ evaluation.

APA, Harvard, Vancouver, ISO, and other styles

5

E.C., Nwadike, Enibe S.O, and Nwabanne J.T. "Determination of the Engineering Properties of Aerial Yam and Water Yam." International Journal of Advances in Scientific Research and Engineering 4, no. 11 (2018): 297–306. http://dx.doi.org/10.31695/ijasre.2018.32965.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Egbuta, Kalu Chibuike. "Essential Amino Acid Composition of Noodles Analogue from Aerial Yam, Rice and African Yam Bean Flour Blend Using Response Surface Methodology." European Journal of Nutrition & Food Safety 15, no. 11 (2023): 76–97. http://dx.doi.org/10.9734/ejnfs/2023/v15i111357.

Full text

Abstract:

Response surface technology was used to evaluate the essential amino acid of noodles analogue from Aerial yam (Dioscorea bulbifera), Rice (Oryza sativa), and African yam bean (Sphenostylissternocarpa) flour mixture. Flours from Aerial yam, rice, and African yam bean were individually produced blended in the ratio of 50%: 25%: 25%, respectively and extruded using Brabender single screw laboratory extruder (Duisburg DCE 330 Model) filled with 3.0mm die nozzle diameter. A central composite rotatable design ( CCRD) with three variables, namely barrel temperature, feed moisture content and screw speed and fire level coded -a, -1, 0, +1, +a, was used in the experimental design to obtain 20 samples of noodles analogue. Essential Amino Acid profiling was done on the noodles analogue and data was analyzed by regression analysis. Results showed that lysine content ranged from 4.55 to 7.55mg/100g, valine content ranged from 3.81 to 5.06mg/100g, methionine content ranged from 0.86 to 2. 24mg/100g, phenylalanine content ranged from 5.06 to 5.45mg/100g, histidine content ranged from 3.09 to 4.20mg/100g, tryptophan content ranged from 0.83 to 1.96mg/100g, leucine content ranged from 6.87 to 7.90mg/100g, isoleucine content ranged from 2.91 to 4.91mg/100g, threonine content ranged from 3.55 to 4.44mg/100g. The coefficients of determinations (R2) were high and ranged from 0.8987 to 0.9916 at 5% level. The response surface plots suggest that the models developed had a good fit and the CCRD was effective in explaining the effect of the process condition on noodles analogue as influenced by barred temperature, feed moisture content and screw speed of the extruder. The data obtained from the study could be used for the control of product characteristics. The study indicated improved noodles analogues from Rice, Aerial yam, and African Yam Bean can be produced as noodles analogues.

APA, Harvard, Vancouver, ISO, and other styles

7

Sánchez-López, Diana Beatriz, Lily Lorena Luna-Castellanos, Manuel Ramón Espinosa-Carvajal, Dairo Javier Pérez-Polo, and Jorge Cadena-Torres. "Capacidad de infección de hongos asociados a la pudrición seca de los tubérculos de ñame." Revista de Investigaciones Altoandinas - Journal of High Andean Research 23, no. 3 (2021): 149–58. http://dx.doi.org/10.18271/ria.2021.305.

Full text

Abstract:

Dry rot of tubers is one of the most devastating diseases in yam production (Dioscorea rotundata Poir.) in the Caribbean region of Colombia. The disease attacks tubers, causing production losses during cultivation. In previous experiments, 11 fungal morphotypes were isolated and associated with this disease in yam crops in the Caribbean region of Colombia. The present investigation was carried out under greenhouse conditions to determine the infection capacity of these 11 possible causative agents, in 150-day-old plants of two yam genetic materials (0307-49SB y 0307-50CB). The results indicated that morphotypes DH2 (Lasiodiplodia theobromae), DH11 (Curvularia aeria), DH20 (Aspergillus niger), and DH17 (Fusarium equiseti), showed the highest infection capacity to yam tubers, regardless of the genetic material. Therefore, they were considered as the main causal agents of the disease in the Caribbean region of Colombia. The remaining seven (7) morphotypes, despite having been inoculated in the roots of the plants, showed minor effects on tubers and affected other organs of the plant, especially stems and aerial part of yam plant. This study allows concentrating the research on these four morphotypes to develop crop management strategies that might allow reducing the incidence of this disease in the Caribbean region of Colombia.

APA, Harvard, Vancouver, ISO, and other styles

8

Okon, Umoh, Enobong. "Effect of extrusion process parameters on the overall acceptability of snacks produced from aerial yam and soybean flour mixture." Agriculture and Food Sciences Research 12, no. 1 (2025): 19–24. https://doi.org/10.20448/aesr.v12i1.6555.

Full text

Abstract:

This study was conducted to evaluate the effect of extrusion cooking parameters on the overall acceptability of the snacks produced from aerial yam and soybean flour mixture. Design Expert (version 11.0.1) was used in the experimental design, with a three-factor experimental setup at five levels each. The aerial yam and soybean flour mixture was formulated in the ratio of 1:3 and extruded using a laboratory-scale single-screw extruder. Response Surface Methodology was adopted in analyzing the effect of the independent variables on the dependent variable. Results showed that the overall acceptability scores ranged from 4.20 to 7.10. Response surface analysis revealed that an increase in barrel temperature, screw speed, and feed moisture resulted in an increase in overall acceptability. The overall acceptability of the snacks was significantly (p < 0.05) affected by barrel temperature and feed moisture, while the screw speed had no significant (p > 0.05) effect on overall acceptability. The interaction of the extrusion cooking parameters had a significant (p < 0.05) effect on the overall acceptability of the snacks. The high range of scores recorded for the snacks indicates that the aerial yam and soybean composite flour extruded snacks were generally well accepted by the panelists.

APA, Harvard, Vancouver, ISO, and other styles

9

Jiwuba, P.C, L.C Ezenwaka, K. Ikwunze, and N.O Nsidinanya. "Growth Performance, Haematological, Carcass and Organ Characteristics of Broiler Birds Fed Aerial Yam (Dioscorea bulbifera) Tuber Meal." International Journal of Case Studies 5, no. 8 (2016): 197–203. https://doi.org/10.5281/zenodo.3531457.

Full text

Abstract:

A-48 day feeding trial was conducted to determine the effects of dietary levels of aerial yam tuber meal (AYTM) on growth performance, haematological, carcass and organ characteristics of broiler birds. Five experimental diets were formulated to include aerial yam tuber meal at 0%, 4%, 8%, 12% and 16% at the starter stage and 0%, 8%, 16%, 24% and 32% at the finisher phase for T1, T2, T3, T4 and T5 respectively. One hundred and twenty (120) day old Anak broiler chicks were used and randomly divided into five groups with each group randomly allotted to the five treatment diets in a Completely Randomized Experimental Design (CRD). Each group was further subdivided into three (3) replicates of eight birds each. The experimental starter and finisher diets were fed ad libitum. Data were collected for growth performance, haematological parameters, carcass and organ characteristics. Total body weight gain and average daily feed intake were significantly (P0.05) difference among the treatment groups. Aerial yam tuber meal showed a good promise when included in the diets of broiler starter and finisher up to 32% without a harmful effect on growth performance, haematological and carcass and organ characteristics of broilers. It can be therefore recommended as a cheaper alternative to maize in broiler feeding.

APA, Harvard, Vancouver, ISO, and other styles

10

Mondo, Jean M., Paterne A. Agre, Alex Edemodu, et al. "Floral Biology and Pollination Efficiency in Yam (Dioscorea spp.)." Agriculture 10, no. 11 (2020): 560. http://dx.doi.org/10.3390/agriculture10110560.

Full text

Abstract:

Yam (Dioscorea spp.) is a monocotyledonous herbaceous vine cultivated for its starchy underground or aerial tubers in the tropics and subtropics. It is an allogamous and polyploid species that reproduces by both sexual and asexual mechanisms. However, many of the landrace cultivars, including most of the popular varieties, reproduce exclusively by vegetative propagation (planting the tubers). These varieties are either sterile or produce sparse and irregular flowering with high flower abortion rate, low fruit and seed set. Production of crossbreed seeds for genetic improvement and for maintaining genetic diversity in yams is, therefore, mainly achieved through natural or managed pollination. Flowering in yam is mostly dioecious and, in some instances, monoecious. Flowering asynchrony, sticky nature of the pollen grains, and cross incompatibility are among the challenges in making genetic progress in yam breeding. There are many limitations in basic and applied knowledge of yam flower biology and pollination. This paper, therefore, reviews the flowering biology, pollination, and methods of improving pollination efficiency in yam breeding programs.

APA, Harvard, Vancouver, ISO, and other styles

11

Massawe, Joseph I., and Gladness E. Temu. "Morphological Variabilities and Identification of Yam (Dioscorea spp.) Genotypes from Major Growing Regions in Tanzania." Tanzania Journal of Science 48, no. 4 (2022): 897–912. http://dx.doi.org/10.4314/tjs.v48i4.16.

Full text

Abstract:

Yam (Dioscorea spp.) is a vegetatively propagated crop that belongs to the family Dioscoreaceae. In Tanzania, yam is mainly grown as a source of food and income generation, especially for smallholder farmers. In this study, an assessment of morphological variations among 74 genotypes of Dioscorea spp. collected from six major growing regions was conducted. Yam genotypes were maintained and planted at Tanzania Agricultural Research Institute-Kibaha for characterization. Data from fifty morphological variables were subjected to multivariate analysis using principal component analysis and cluster analysis. The first nine principal components with Eigenvalues > 1 accounted for 86.28% of the total variations. Some traits that contributed to the variabilities include stem length, leaf margin colour, vein colour, absence/presence of wings, wing colour, hairiness, spines on stem base, aerial tubers, and inner skin colour. The dendrogram separated the 74 yam genotypes into two major clusters with six sub-clusters. Based on the results, four yam species were identified from the collected genotypes, and these included D. alata, D. bulbifera, D. cayenensis, and D. dumetorum. The results revealed high morphological variabilities among the yam genotypes. Information obtained in this study is very useful in yam breeding programs in Tanzania. Keywords: Cluster analysis, multivariate analysis, phenotypic variabilities, yam in Tanzania

APA, Harvard, Vancouver, ISO, and other styles

12

Lawal, Adetunji, and Rahman Akinoso. "Physical properties, proximate composition and antioxidant activities of aerial yam (Dioscorea bulbifera) bulbils grown in Nigeria." Acta Periodica Technologica, no. 50 (2019): 143–51. http://dx.doi.org/10.2298/apt1950143l.

Full text

Abstract:

Aerial yam is a traditional yam species of interest among the local populations in the tropics because of their nutritional and medicinal claims. In this study, flours were produced from the two cultivars (Tob2857 and Tob3059) of Aerial Yam Bulbils (AYB) harvested at two stages of maturation. The color, functionality, proximate composition and bioactive compounds of flour were assessed. Generally, green AYB flours showed higher Hunter L* (71.86-73.68) and Whiteness index (66.31-66.92) than brown samples (Hunter L*, 71.16-72.50; Whiteness index, 62.93-64.64). Bulk density of green and brown AYB flours varied from 0.69 to 0.74 and 0.73 to 0.77 g/ml, respectively. Flours of brown AYB showed significantly higher water binding capacity (135.70-142.36%) than green samples (129.91-129.22%). Carbohydrate and protein were the main components of AYB flour. The antioxidant indices (DPPH scavenging activity, ferrous ion chelating activity, and reducing power) were higher in green AYB flours compared to brown samples and the values increased with the concentration. Therefore, the high antioxidant activity profiles of green AYB flours are desirable characteristics in food products where bioactive composition is of great importance.

APA, Harvard, Vancouver, ISO, and other styles

13

Rachel Nnenna Orji. "Profiling the In vitro starch contents of some underutilized tubers flours as affected by some pre-processing operations." World Journal of Advanced Research and Reviews 20, no. 3 (2023): 1387–94. http://dx.doi.org/10.30574/wjarr.2023.20.3.2568.

Full text

Abstract:

Aerial yam(Dioscorea bulbifera),cocoyam(Xanthosoma robustum) and water yam (Dioscorea alata) were analyzed for their starch contents using in vitro method after subjecting them to four pre-processing operations of boiling, sprouting, frying, roasting and a set was left untreated. Boiled Cocoyam (Xanthosoma robustum) was significantly(p<0.05)different in total starch contents(58.50%) and rapidly digestible starch (55.88%) when compared to all the samples while among the processing operations, boiling as a treatment was significantly (p<0.05) different from sprouting, frying, roasting as well as the untreated.

APA, Harvard, Vancouver, ISO, and other styles

14

Tewodros, Mulualem, and WeldeMichael Getachew. "Agronomical Evaluation of Aerial Yam/ Dioscorea bulbifera/ Accessions collected from South and Southwest Ethiopia." Greener Journal of Agricultural Sciences 3, no. 9 (2013): 623–27. https://doi.org/10.15580/GJAS.2013.9.073113767.

Full text

Abstract:

The experiment was conducted at Jimma Agricultural Research center. The objectives of the study were to estimate the level of diversity within collected accessions based on key agronomic trait(s) that can be used for selection of aerial yam accessions for high root yield and evaluate the accessions based on root yield and other related trait. A total of 47 accessions of aerial yam were tested in randomized complete block design with three replications. Both qualitative and quantitative data collected were subjected to multivariate analysis using principal component (PCA), cluster analysis and analysis of variance to determine the variability of accessions. The results of PCA based on qualitative traits indicated that traits have good contribution to the variability. The two-dimensional plot of the first two PCs showed a separation between accessions in big sized. Cluster analysis based on qualitative characters showed the creation of six distinct groups with different sizes and presence of variability, based on their above and below ground plant parts. The result of Shannon-Weaver diversity index (H’=0.18) showed low levels of diversity between aerial yam accessions. Analysis of variance indicated that tuber length, tuber diameter and vine length have highly significant (P>0.01) differences exists for most of the characters studied. Estimate of phenotypic and genotypic coefficients of variation also showed the presence of variability among the accessions for the a limited number of the characters namely, vine length, vine dry weight, tuber length and tuber diameter. Relatively high phenotypic (53.96, 44.99 and 26.07 %) and genotypic coefficients of variation (12.44, 22.81 and 11.18%) were observed for vine dry weight, tuber dry weight and vine fresh weight in the order of magnitudes. Heritability (39.69% and 25.70%) coupled with genetic advance as percent of mean (12.42% and 23.83%) were recorded for vine length and tuber dry weight per plot, respectively. Path coefficient analysis revealed that that vine dry weight (p =1.203) and leaf length (p =1.1949) was more important than other traits, hence can be used as a criterion for indirect selection. Therefore, selections based on vine dry weight and leaf length are vital to increase the yield and the genetic improvement of this crop. The overall results of this study showed that aerial yam accessions collected from south and southwestern Ethiopia have an enormous wealth of traits variation, indicating huge potential for its genetic improvements through selection and hybridization.

APA, Harvard, Vancouver, ISO, and other styles

15

Kouam, Eric B., Marie L. Avana-Tientcheu, Vanessa D. Lekeumo, Hermine M. Akitio, Damase P. Khasa, and Remy S. Pasquet. "Agro-ecological distribution of the phenotypic diversity of aerial yam (Dioscorea bulbifera L.) in Cameroon using multivariate analysis: prospect for germplasm conservation and improvement." Open Agriculture 3, no. 1 (2018): 190–206. http://dx.doi.org/10.1515/opag-2018-0020.

Full text

Abstract:

Abstract Aerial yam (Dioscorea bulbifera L.) is a crop of great economic importance and an excellent candidate for improving food security in developing countries. Understanding the genetic variability of any crop species is a decisive step for its improvement and requires characterization and evaluation of available germplasm. The objectives of this study were to determine the extent of genetic variability, estimate the association between agromorphological traits and clustering among 57 genotypes of aerial yam from three distinct agro-ecological zones in Cameroon using multivariate analysis. Thirty nine characters (23 qualitative and 16 quantitative) were used for the study. Significant differences in genetic diversity indices were found. Accessions from the bimodal humid forest zone (Na = 2.08, He = 0.27) showed significantly lower diversity compared to both western highland (Na = 2.30, He = 0.34) and humid monomodal forest zones (Na = 2.57, He = 0.32). Means values of most quantitative traits also showed significant differences between agro-ecological zones. Batingla-3 and Bawouwoua-1 had important bulbil yield, reaching 3500 g / plant. Significant associations were found between many traits. The use of the Unweighted Pair Group Method with Arithmetic Mean allowed the distribution of the 57 genotypes into six distinct clusters with the clustering pattern not showing any parallelism with location sites or agro-ecological zones. Mahalanobis D2 statistics revealed the highest inter-cluster distance between cluster II and VI. Accessions of these clusters are potential parents for future breeding programs. This study showed that aerial yam from Cameroon has an enormous wealth of traits variation, indicating huge potential for its genetic improvement through selection and hybridization.

APA, Harvard, Vancouver, ISO, and other styles

16

Islam, Md Tariqul, Rais Uddin Chowdhury, Rozina Afroz, Sajia Rahman, and Md Mamtazul Haque. "Characterization and Maintenance of Yam (Dioscorea Spp.) Germplasm." Bangladesh Journal of Agricultural Research 36, no. 4 (2012): 605–21. http://dx.doi.org/10.3329/bjar.v36i4.11748.

Full text

Abstract:

Three experiments were conducted with 60 germplasm accessions of yam (Dioscorea spp.) at Plant Genetic Resources Centre of BARI for characterization and conservation of germplasm. Fifty-nine germplasm accessions of D. alata L. and one accession of D. bulbifera L. from different districts of Bangladesh were used. Clockwise twining direction was found in D. bulbifera and anti-clockwise twining direction was exhibited in all D. alata germplasm accessions. Potato like aerial tuber was found in D. bulbifera. Round, oval, elongate, flattened to irregular aerial tuber shape were found. Grayed-brown, brown to grayed-orange skin colour with yellow, yellow-orange to grayed-orange of aerial tuber flesh colour were observed among the yam germplasm accessions. Oval-oblong, cylindrical, flattened, corm, rhizome to irregular shape of underground stem or tubers were observed. Low, medium to dense types of spiniess of roots were found on the tubers. Grayed-orange, red to black tuber skin colour along with white, yellowish-white, yellow, yelloworange, red to purple tuber flesh colours were found. Significant variations were also observed in stem shape at base, colour of stem, wing and petiole wing, position of leaf, leaf shape and distance between leaf lobes. Low to high phenotypic diversity was exhibited among the germplasm accessions. The germplasm accessions produced 1 to 30 under ground tubers per plant. The main tuber length ranged from 5.4 to 66.4 cm and breadth from 2.5 to 15.5 cm. The germplasm accessions produced 0.51 kg to 16.45 kg tuber yield per plant. The maximum variability was found in tuber yield per plant (98.74%) and the minimum was found in leaf length (12.55%).The under ground tubers of yam were harvested and replanted at an interval of two to three years from 1995 at PGRC. The plants were grown on bamboo trail in the field genebank. Necessary intercultural operations are done for maintaining the yam germplasm accessions. DOI: http://dx.doi.org/10.3329/bjar.v36i4.11748 Bangladesh J. Agril. Res. 36(4): 605-621, December 2011

APA, Harvard, Vancouver, ISO, and other styles

17

Rachel, Nnenna Orji. "Profiling the In vitro starch contents of some underutilized tubers flours as affected by some pre-processing operations." World Journal of Advanced Research and Reviews 20, no. 3 (2023): 1376–86. https://doi.org/10.5281/zenodo.12776494.

Full text

Abstract:

Aerial yam(Dioscorea bulbifera),cocoyam(Xanthosoma robustum) and water yam (Dioscorea alata) were analyzed for their starch contents using in vitro method after subjecting them to four pre-processing operations of boiling, sprouting, frying, roasting and a set was left untreated. Boiled Cocoyam (Xanthosoma robustum) was significantly(p<0.05)different in total starch contents(58.50%) and rapidly digestible starch (55.88%) when compared to all the samples while among the processing operations, boiling as a treatment was significantly (p<0.05) different from sprouting, frying, roasting as well as the untreated.

APA, Harvard, Vancouver, ISO, and other styles

18

Backian, Grace S., Betty T. Gayao, and Dalen T. Meldoz. "Informal Seed System on Greater Yam (Dioscorea alata):." Mountain Journal of Science and Interdisciplinary Research (formerly Benguet State University Research Journal) 80, no. 1 (2020): 40–47. https://doi.org/10.70884/mjsir.v80i1.263.

Full text

Abstract:

Indigenous knowledge on variety, seed selection and seed-related practices is very important in the maintenance of greater yam diversity. However, baseline information on indigenous production, storage, or exchange of traditional greater yam varieties, and planting materials is very limited, especially among the indigenous people of the Northern Philippines. Hence, this documentation using secondary data, key informant interviews, field observation, and photo documentation to validate gathered information. Indigenous farmers’ technique on the utilization and management of cut setts that weigh from 200-500g, aerial tubers, and small to big tubers allowed for the multiplication and maintenance of indigenous varieties. At present, the round and elongated varieties with purple-colored-flesh color are utilized in commercial purple yam production. Thus, the need to strengthen research and development on local or traditional varieties conservation and capacity building with emphasis on production, storage, and distribution.

APA, Harvard, Vancouver, ISO, and other styles

19

Ekaette, Eunice, Emeka Nwofia, Peter Okocha, et al. "Exploring the genetic diversity and population structure of aerial yams (Dioscorea bulbifera L.) DArT-seq and agronomic traits." PLOS ONE 19, no. 8 (2024): e0306631. http://dx.doi.org/10.1371/journal.pone.0306631.

Full text

Abstract:

Dioscorea bulbifera is an edible yam specie with aerial bulbils. Assessing the genetic diversity of D. bulbifera accession for cultivation and breeding purposes is essential for it genetic improvement, especially where the crop faces minimal attention. The aims of this study was to assess the genetic diversity of Dioscorea bulbifera accessions collected from Nigeria and accessions maintained at the genebank of International Institute of Tropical Agriculture (IITA) Ibadan. Accessions were profiled using quatitative and qualitative phenotypic traits and Diversity Array Technology SNP-markers. Multivariate analysis based phenotypic traits revealed high variability among the evaluated accessions and all phenotypic traits assessed were useful in discriminating the aerial yam accessions. Clustering analysis based phenotypic traits revealed the presence of two well defined clusters. Using DArT-Seq marker, the 94 accessions were classified into three genetic group through the admixture and the phylogeny analysis. The comparision of phenotypic and genotypic clustering revealed inconsistency membership across the two clustering methods. The study established a baseline for the selection of parental lines from the genetic groups for genetic improvement of the D. bulbifera.

APA, Harvard, Vancouver, ISO, and other styles

20

Eni Kalu, Success, Aniefiok Ndubuisi Osuagwu, and Reagan Bisong Agbor. "Phytochemical Composition of the Leaves of Aerial Yam (Dioscorea bulbifera L.)." International Journal of Scientific and Research Publications (IJSRP) 9, no. 2 (2019): p8633. http://dx.doi.org/10.29322/ijsrp.9.02.2019.p8633.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Terauchi, R., T. Terachi, and K. Tsunewaki. "Physical map of chloroplast DNA of aerial yam, Dioscorea bulbifera L." Theoretical and Applied Genetics 78, no. 1 (1989): 1–10. http://dx.doi.org/10.1007/bf00299745.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Gbocho, Serge Elvis Ekissi. "Effect of boiling and baking times on the functional properties of aerial yam (Dioscorea bulbifera) flours cv Dugu-won har vested in Côte d'Ivoire." International Journal of Agronomy and Agricultural Research (IJAAR) 10, no. 2 (2017): 1–12. https://doi.org/10.5281/zenodo.2611071.

Full text

Abstract:

The study examined the effect of boiling and baking times on the functional properties of aerial yam (Dioscorea bulbifera) flours in order to assess which one can ameliore better their functional properties. Boiling and baking times affected significantly (P<0.05) the functional properties of D. bulbifera cv Dugu-won flours. They increased the water absorption capacity (WAC), water solubility index (WSI), bulk density (BD) dispersibility (D), least gelation concentration (LGC), paste clarity (PC), swelling power (SP) and solubility of aerial yamflours cv Dugu-won. But they decreased iodine affinity of starch, foam capacity and foam stability. The boiling increased the absorption capacity of olive oil, maize oil, red oil, dinor oil and sunflower oil from Dioscorea bulbifera cv Dugu-won bulbils flours. The baking decreased the absorption capacity of the same oils. Boiling and baking have been found to give good functional properties which can be high importance in food manufacturing industries. However boiling ameliored better functional properties of aerial yam flours cv Dugu-won than baking. International Journal of Agronomy and Agricultural Research - IJAAR is an open-access scholarly research journal, published by International Network for Natural Sciences. IJAAR publishes original scientific research articles in the field of Agronomy and Agricultural Sciences. IJAAR published 2 Volume and 12 issue per the calendar year.

APA, Harvard, Vancouver, ISO, and other styles

23

CRAUFURD, P. Q., R. J. SUMMERFIELD, R. ASIEDU, and P. V. VARA PRASAD. "DORMANCY IN YAMS." Experimental Agriculture 37, no. 2 (2001): 147–81. http://dx.doi.org/10.1017/s001447970100206x.

Full text

Abstract:

The tubers of yam, principally those of Dioscorea rotundata (white Guinea yam) and D. alata (water or greater yam), are important staple foods and sources of carbohydrate in West Africa. Yams are grown in diverse environments – from the high-rainfall forest zone on the coast to the seasonally arid savannas of West Africa, that is in situations in which the duration and the timing of the onset of the growing season vary appreciably. Dormancy in both underground and aerial tubers of the Dioscoreaceae is an important adaptive mechanism that helps to maintain organoleptic quality during storage and also ensures that tubers germinate at the start of the growing season. Plant breeders are especially keen to manipulate the duration of the dormant period in order to synchronize growth periods and, therefore, to produce more than one generation per year. The control of tuber dormancy, however, is poorly understood. This review examines critically those factors that affect tuber initiation, dormancy and sprouting, and makes recommendations for future priorities in research.

APA, Harvard, Vancouver, ISO, and other styles

24

Ayo, J. A., M. Ojo, and J. Obike. "Proximate composition, functional and phytochemical properties of pre-heated aerial yam flour." Research Journal of Food Science and Nutrition 3, no. 1 (2018): 1–8. http://dx.doi.org/10.31248/rjfsn2017.035.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Umoh, Enobong Okon, and Moses Columba Ekanem. "Effects of Barrel Temperature, Screw Speed and Feed Moisture Content on the Organoleptic Properties of Aerial Yam-Soybean Flour Extruded Snacks." African Journal of Agricultural Science and Food Research 16, no. 1 (2024): 51–67. http://dx.doi.org/10.62154/ajasfr.2024.016.010409.

Full text

Abstract:

The effects of barrel temperature, screw speed and feed moisture content, as extrusion process parameters, on the organoleptic properties of aerial yam-soybean flour extruded snacks were investigated, using Response Surface Analysis. The extruded snacks were produced using a Laboratory scale single-screw food extruder. Results of the determination of organoleptic properties of the extruded snacks showed that: texture; taste; colour; and aroma ranged from 4.38 to 6.02; 4.68 to 6.78; 4.58 to 6.97; and 4.45 to 7.00, respectively. Response surface Analysis indicated that barrel temperature and screw speed had significant effect (p < 0.05) on texture, while feed moisture had no significant effect (p > 0.05) on the texture of the snacks. All the extrusion parameters had significant effect (p < 0.05) on the taste of the snacks. Barrel temperature and feed moisture had significant effect (p < 0.05) on colour, while screw speed showed non-significant effect (p > 0.05) on the colour of the snacks. Barrel temperature had significant effect (p < 0.05) on aroma, while screw speed and feed moisture had no significant effect (p > 0.05) on the aroma of the snacks. The results obtained for the organoleptic properties of the snacks can attest to the fact that it is possible to obtain expanded or ready-to-eat (RTE) products from aerial yam-soybean flour blends by extrusion processing technology, that possess desirable organoleptic properties.

APA, Harvard, Vancouver, ISO, and other styles

26

Induar, Sadhni, Debasmita Dubey, Shakti Rath, Rajesh Kumar Mehe, Santosh Kumar Swain, and Subrat Kumar Tripathy. "Evaluation of the Antioxidant and Antimicrobial Activity of the Nutritionally Rich Plant, Dioscorea alata L." Biomedical and Pharmacology Journal 17, no. 2 (2024): 1265–78. http://dx.doi.org/10.13005/bpj/2940.

Full text

Abstract:

Dioscorea alata belongs to Dioscoreaceae or the yam family. Around 600 Dioscorea species are consumed in various regions of the world. Dioscorea alata is well known cultivated tuber consumed by both rural and urban people. In this study, we have investigated the nutrient composition, phytochemicals, and antioxidant and antimicrobial activity of the underground and aerial tubers of Dioscorea alata. The result of the analysis showed that the aerial tuber of D. alata contained a higher amount of moisture (68.51%), ash (4.64%), starch (5.61%), reducing sugar (0.029%), fat (0.33%) and protein (1.39%) than underground tuber of D. alata. At the same time, carbohydrates, free amino acids, vitamin C, sodium, potassium and iron contents were superior in the underground tuber than in the aerial tuber. Further, both underground and aerial tuber was a good source of phenols, flavonoids, tannins and diosgenin. The underground tuber exhibited better DPPH scavenging potential compared to the aerial tuber. Six solvents extract of D. alata showed significant to moderate antibacterial activity toward seven tested clinical stains. Thus, the tuber of D. alata could be used as a better food supplement to meet the calorie requirement and a rich source of relevant antimicrobial agents to treat microbial infections.

APA, Harvard, Vancouver, ISO, and other styles

27

Beyerlein, Patrick, and Henrique dos Santos Pereira. "Morphological diversity and identification key for landraces of the Amerindian yam in central Amazon." Pesquisa Agropecuária Brasileira 53, no. 4 (2018): 405–18. http://dx.doi.org/10.1590/s0100-204x2018000400002.

Full text

Abstract:

Abstract: The objective of this work was to select an optimal set of morphological descriptors, in order to characterize the phenotipical diversity of Amerindian yam (Dioscorea trifida) landraces cultivated in the municipality of Caapiranga, in the central Amazon region of Brazil, and to develop a botanical identification key for them. A collection of 140 accessions and an experimental plot with a representative sample of 20 landraces were used to test 64 morphological descriptors for the aerial and subterranean plant parts. Forty-eight descriptors were selected, of which 13 were for tubers, 12 for stems, 14 for leaves, and 9 for inflorescences and seed. A cluster analysis based on the morphological data showed the formation of two landrace groups with greater similarity: white and purple pulp tubers. The results provide tools for in situ and ex situ conservation and for plant breeding programs, considering the importance of maintaining and recognizing the value of Ameridian yam as an important native genetic resource for food security in the region.

APA, Harvard, Vancouver, ISO, and other styles

28

Umoh, Enobong Okon, Madu Ofo Iwe, and Philippa C. Ojimelukwe. "Optimization and Validation of Extrusion Process Parameters for the Sensory Characteristics of Extruded Aerial Yam and Soybean Flour Blends." Asian Journal of Science and Applied Technology 13, no. 2 (2024): 14–24. http://dx.doi.org/10.70112/ajsat-2024.13.2.4246.

Full text

Abstract:

The aim of this study was to optimize and validate the extrusion process parameters (barrel temperature, screw speed, and feed moisture) for the sensory properties (texture, taste, appearance, and aroma) of extrudates made from blends of soybean and aerial yam flours. Five levels of barrel temperature (95, 100, 105, 110, and 115 °C), screw speed (85, 100, 115, 130, and 145 rpm), and feed moisture (31, 33, 35, 37, and 39%) were employed in 20 runs of the response surface methodology (RSM), which was based on the Box-Behnken design with three variables. A single-screw extruder at the laboratory scale was used to carry out the extrusion procedure. A high regression coefficient (R2 ≥ 0.9) indicates that the models are useful for navigating the design space. Numerical optimization results indicated that the optimal extrusion process parameters - barrel temperature of 114.12 °C, screw speed of 100.56 rpm, and feed moisture of 38.02% - produced extrudates with optimal sensory property scores of 5.34 for texture, 4.91 for taste, 6.97 for appearance, and 5.80 for aroma, with a desirability of 0.943. The correlation between the predicted and experimental values yielded a high coefficient of determination, indicating a good correlation. The “Fit and Diagnostic Case” statistics showed a low range of deviations between the predicted and observed values for the sensory characteristics. Therefore, the generated quadratic model accurately predicts the sensory characteristics of aerial yam-soybean flour blends and is thus validated.

APA, Harvard, Vancouver, ISO, and other styles

29

Umoh, Enobong Okon, Madu Ofo Iwe, and Philippa C. Ojimelukwe. "Numerical Modeling for Optimizing and Validating Extrusion Process Conditions for the Proximate Composition of Blended Aerial Yam and Soybean Flours." African Journal of Advances in Science and Technology Research 17, no. 1 (2024): 154–75. https://doi.org/10.62154/ajastr.2024.017.010520.

Full text

Abstract:

The need to formulate/develop acceptable food products from neglected food crops, and control the process conditions in order to produce extrudates with the desired quality, results in optimization. This study is therefore aimed at numerical modeling for the optimization and validation of extrusion process conditions for the proximate composition of blended aerial yam and soybean flours. Design Expert (version 11.0.1) was used in the experimental design, with a three-factor experimental set-up at five levels each, with barrel temperature, screw speed and feed moisture levels, as the independent factors. The blended flour was extruded using a single-screw extruder. Results of the laboratory analysis of the extrudates showed proximate compositions of 4.03 to 5.90% ash, 3.10 to 7.02% moisture content, 2.70 to 4.6% fibre, 24.57 to 36.79% protein, and 11.39 to 35.35% crude fat (lipid). Numerical optimization of the extrusion process conditions indicated optimal barrel temperature, screw speed and feed moisture of 112.11oC, 136.49 rpm and 34.65%, respectively, and optimum ash, moisture, fibre, protein, and lipid contents of 5.46%, 4.73%, 4.04%, 36.79%, and 22.59%, respectively, with a desirability of 0.857. The experimental values obtained were 5.39% for ash, 4.77% for moisture content, 4.11% for fibre, 36.72% for protein, and 22.64% for lipid. Comparison of the predicted and experimental results for the optimum predicted and measured responses showed an excellent correlation between the predicted and experimental values for the responses. Therefore, the generated quadratic model has the accuracy to predict the proximate compositions of the extruded aerial yam and soybean flour blend and is validated.

APA, Harvard, Vancouver, ISO, and other styles

30

Umoh, Enobong Okon. "Emulsion Capacity and Foaming Capacity of Blended Aerial Yam and Soybean Flour as Affected by Extrusion Process Conditions." African Journal of Agricultural Science and Food Research 19, no. 1 (2025): 1–13. https://doi.org/10.62154/ajasfr.2025.019.01011.

Full text

Abstract:

This study was conducted to determine the effect of extrusion process conditions on the emulsion capacity and foaming capacity of extruded aerial yam-soybean flour blends. Design expert (variant 11.0.1), a statistical computer application software package was used in the preliminary arrangement, with a three-variable preliminary set-up at five levels each, with barrel temperature, screw speed, and feed moisture levels as the free factors. Response surface methodology (RSM) was used to examine the effects of the independent components or variables on the response. The blended flour sample was extruded using a laboratory scale single-screw extruder. Twenty (20) runs were carried out during the extrusion process. Results of the laboratory analyses showed that the extrudates had emulsion capacity of between 28.51 and 34.85%, and foaming capacity of between 3.37 and 4.86%. Response surface plots for the effects of the extrusion process conditions indicated that increase in barrel temperature, screw speed, and feed moisture resulted in decreased emulsion capacity of the extrudates. Increase in barrel temperature and feed moisture resulted in increased foaming capacity, while increased in screw speed decreased the foaming capacity of the extrudates. Barrel temperature had significant effect (p< 0.005) on emulsion capacity; while screw speed and feed moisture showed non-significant effect (p> 0.005) on the emulsion capacity of the extrudates. Screw speed significantly (p< 0.005) affected the foaming capacity, while the barrel temperature and feed moisture showed non-significant effect (p> 0.005) on the foaming capacity of the extruded aerial yam and soybean flour blend.

APA, Harvard, Vancouver, ISO, and other styles

31

Umoh, Enobong Okon, Madu Ofo Iwe, Philippa C. Ojimelukwe, and Promise Joseph Etim. "Extrusion Cooking and its Impact on the Overall Acceptability of Snacks Produced from Aerial Yam and Soybean Composite Flour." African Journal of Agricultural Science and Food Research 18, no. 1 (2025): 36–46. https://doi.org/10.62154/ajasfr.2025.018.010603.

Full text

Abstract:

This study evaluated the impact of extrusion cooking on the overall acceptability of snacks produced from aerial yam and soybean composite flour. Design Expert (version 11.0.1) was used in the experimental design, with a three-factor experimental set-up at five levels each. The aerial yam and soybean composite flour was formulated in the ratio of 1:3 and extruded using laboratory scale single-screw extruder. Twenty runs were carried out to produce twenty samples for the sensory test. Response Surface Methodology was adopted in analyzing the effect of the independent variables on the dependent factors. Results of sensory evaluation showed that the overall acceptability scores ranged from 4.20 to 7.10. The least score of 4.20 for overall acceptability was recorded for snacks produced at 100 barrel temperature, 100 rpm screw speed and 33% feed moisture, while the highest score (7.10) for overall acceptability was obtained from snacks produced at 110 barrel temperature, 100 rpm screw speed and 37% feed moisture. Response surface analysis revealed that an increase in barrel temperature, screw speed and feed moisture resulted in an increase in the overall acceptability. The overall acceptability of the snacks was significantly (p < 0.05) affected by barrel temperature and feed moisture, while the screw speed had no significant (p > 0.05) effect on the overall acceptability. The interaction of the extrusion cooking parameters had a significant (p < 0.05) effect on the overall acceptability of the snacks. The acceptability scores ranged from 4.20 to 7.10, indicating moderate to high acceptance by sensory panelists.

APA, Harvard, Vancouver, ISO, and other styles

32

Tewodros, Mulualem, and WeldeMichael Getachew. "Agronomical Evaluation of Aerial Yam/ Dioscorea bulbifera/ Accessions collected from South and Southwest Ethiopia." Greener Journal of Agricultural Sciences 3, no. 9 (2013): 693–704. http://dx.doi.org/10.15580/gjas.2013.3.073113767.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Bansod, Pallavi N., Ekta Ningot, and Sanjivani P. Gondane. "Biochemical and sensory evaluation of cookies produced from Aerial yam (Dioscorea bulbifera L.) flour." International Journal of Chemical Studies 8, no. 3 (2020): 1590–95. http://dx.doi.org/10.22271/chemi.2020.v8.i3v.9421.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Beyene, Tewodros Mulualem. "Diversity of Aerial Yam /Dioscorea bulbifera (L.)/ Accessions in Ethiopia Based on Agronomic Traits." Agriculture, Forestry and Fisheries 2, no. 2 (2013): 67. http://dx.doi.org/10.11648/j.aff.20130202.12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Hasan, Sayed M. Zain, Andrew A. Ngadin, Ramisah M. Shah, and Norizan Mohamad. "Morphological variability of greater yam (Dioscorea alata L.) in Malaysia." Plant Genetic Resources 6, no. 1 (2008): 52–61. http://dx.doi.org/10.1017/s1479262108920050.

Full text

Abstract:

An assessment of morphological variation among 70 accessions of greater yam (Dioscorea alata L.) collected throughout Malaysia was made. Data of 47 morphological variables measured from the accessions were subjected to multivariate analysis using principal component (PCA) and cluster analysis (CA). The PCA results indicated that the characters contributing largely to the species variability were those related to the shape, size and flesh colour of underground tubers; shape and colour of aerial tubers; position, shape, size and vein colour of the leaves; petiole colour; shoot growth rate; and number of days for shoots to germinate. The two-dimensional plot of the first two PCs showed a separation between accessions of purple tuber groups and those of white tuber groups, but was unable to distinguish accessions according to tuber shape groups, i.e. irregular, oblong and round, as revealed by visual observation. The dendrogram of CA revealed four major groups of D. alata in Malaysia, which supported the PCA grouping. This study demonstrated that D. alata in Malaysia consists of numerous genotypes revealing wide inter- and intra-group variability.

APA, Harvard, Vancouver, ISO, and other styles

36

Osuagwu, Aniefiok, Uduak Edem, Ndem Edu, et al. "Unveiling the Genetic Diversity of Aerial Yam (Dioscorea bulbifera L.): Morphological Insights for Sustainable Crop Improvement." Annual Research & Review in Biology 39, no. 12 (2024): 78–89. https://doi.org/10.9734/arrb/2024/v39i122173.

Full text

Abstract:

Background: Genetic diversity is a cornerstone of sustainable agriculture, enhancing the resilience and productivity of crops in changing environments. Aerial yam (Dioscorea bulbifera L.), a tuber crop primarily grown in tropical and subtropical regions, has the potential to contribute to food and nutritional security. Despite its importance, the genetic diversity of aerial yam remains largely unexplored, limiting its conservation and genetic improvement. Aim: The aim of this study was to assess the genetic diversity of 20 D. bulbifera landraces collected from six Nigerian states (Cross River, Akwa Ibom, Enugu, Abia, Benue, and Ebonyi) using morphological traits as markers. Study Design: A randomized complete block design (RCBD) was used, with three replicates. Place and Duration of Study: The experiment was conducted at the experimental field of University of Calabar, Calabar, Nigeria, from March 2023 to February 2024. Methodology: Bulbils from 20 D. bulbifera landraces, were planted on March 19, 2023 on a single-row plot. Key morphological traits; vine length, leaf area, and bulbil production, were recorded and analyzed for ANOVA, principal component analysis (PCA), cluster analysis, and path coefficient analysis. Results: Significant variations (p < 0.05) were observed for all traits, indicating genetic diversity among the landraces. PCA identified three principal components accounting for 57.25% of the total variability, with root length, leaf area, and bulbil count being the most influential traits. Cluster analysis grouped the landraces into two clusters with no strict adherence to geographic origin, suggesting possible gene flow. There is a positive relationship between vine length and leaf area (r = 0.349, p < 0.05), while leaf length had the strongest direct effect on bulbil production. Conclusion: The findings highlight significant genetic variability within D. bulbifera, providing a basis for breeding and conservation. This study emphasizes the crop’s potential for food security and sets the stage for integrating molecular techniques alongside morphological assessments.

APA, Harvard, Vancouver, ISO, and other styles

37

Yan, Q. Q., Y. Li, X. Q. Sun, J. L. Guo, Y. Y. Hang, and M. M. Li. "Research Article Isolation and characterization of polymorphic microsatellite loci from aerial yam (Dioscorea bulbifera L.)." Genetics and Molecular Research 13, no. 1 (2014): 1514–17. http://dx.doi.org/10.4238/2014.march.12.3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Ezeocha, V. C., J. S. Nwogha, A. N. Ohuoba, and L. I. Chukwu. "Evaluation of Poultry Manure Application Rates on the Nutrient Composition of Dioscorea bulbifera (Aerial yam)." Nigerian Food Journal 32, no. 2 (2014): 92–96. http://dx.doi.org/10.1016/s0189-7241(15)30122-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Ojo, Mofoluwaso Olufunmilola, Kunle Oni, Fortune Abidemi Femi, et al. "Analysis of different extraction solvents: Influence on some properties of aerial yam (Dioscorea bulbifera) starch." African Journal of Food Science 16, no. 12 (2022): 326–33. http://dx.doi.org/10.5897/ajfs2022.2173.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Thakur, Padmakshi, Deoshankar Ram, Vikas Ramteke, and Upendra Naik. "Chhattisgarh Dangkanda-1: A new high yielding variety of aerial yam (D. bulbifera) for Chhattisgarh." International Journal of Horticulture and Food Science 7, no. 1 (2025): 27–30. https://doi.org/10.33545/26631067.2025.v7.i1a.239.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Araki, Tomohiro, Mayumi Kuramoto, and Takao Torikata. "Purification of Three Acidic Chitinases from Yam Aerial Tuber. Application of Quaternary Ammonium Ion Detergent for the Separation of Yam Chitinase from Viscous Tissue Extract." Bioscience, Biotechnology, and Biochemistry 59, no. 3 (1995): 430–34. http://dx.doi.org/10.1271/bbb.59.430.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Ramser, Juliane, Kurt Weising, Günter Kahl, Cristina López-Peralta, and Rainer Wetzel. "Genomic variation and relationships in aerial yam (Dioscorea bulbifera L.) detected by random amplified polymorphic DNA." Genome 39, no. 1 (1996): 17–25. http://dx.doi.org/10.1139/g96-003.

Full text

Abstract:

Random amplified polymorphic DNA (RAPD) markers were used to assess intraspecific variability and relationships in aerial yam (Dioscorea bulbifera L.). A total of 23 accessions from different geographic locations in Africa, Asia, and Polynesia were analyzed by 10 arbitrarily chosen GC-rich decamer primers. Using cesium chloride purified genomic template DNA, highly reproducible polymorphic fingerprints were generated by all 10 primers, resulting in a total of 375 informative characters. Only eight bands were monomorphic among all investigated accessions. A binary character matrix was generated by scoring for presence/absence of a band at a particular position, transformed into a matrix of pairwise distances using either the Jaccard or a simple matching coefficient, and analyzed by neighbour joining, UPGMA (unweighted pair group method with arithmetic averaging) cluster analysis, or split decomposition. All methods of data evaluation resulted in similar groupings that reflected the geographical origin of the samples. The African accessions formed a distinct isolated group, whereas Asian and Polynesian accessions proved to be more heterogeneous. With two exceptions (var. suavior and var. sativa), the RAPD data supported previous varietal classification based on morphological characters. Stepwise reduction of the number of evaluated characters did not affect branching patterns of the trees above a minimum threshold of 150. Key words : Dioscorea bulbifera, random amplified polymorphic DNA (RAPD), genetic variation, genetic relatedness.

APA, Harvard, Vancouver, ISO, and other styles

43

Umoh, Enobong O., and Madu O. Iwe. "Effects of Extrusion Processing on the Proximate Compositions of Aerial Yam (Dioscorea bulbifera)-soybean (Glycine max) Flour Blends Using Response Surface Methodology." Journal of Food Research 11, no. 1 (2022): 38. http://dx.doi.org/10.5539/jfr.v11n1p38.

Full text

Abstract:

The impact of extrusion process parameters on the proximate compositions of aerial yam (Dioscorea bulbifera)-soybean (Glycine max) flour blends was investigated with the help of a laboratory scale single-screw extruder, and the flour blending ratio of 25% aerial yam: 75% soybean. Response surface methodology based on Box-Behken design at three factors, five levels of barrel temperature (95, 100, 105, 110, and115℃ ), screw speed (85, 100, 115, 130, and145rpm) and feed moisture (31, 33, 35, 37, and 39%) were used in 20 runs. Adequate and significant (p&lt; 0.05) regression models describing the effects of process parameters on the product quality attributes with high regression coefficient, R2&ge; &nbsp;0.9 were obtained, showing that the models can be used to navigate the design space. Results obtained showed that the proximate compositions ranged between 4.03&plusmn; 0.002 and 5.90&plusmn; 0.002% ash; 3.10&plusmn; 0.001 and 7.02&plusmn; 0.003% moisture content; 2.70&plusmn; 0.001 and 4.67&plusmn; 0.003% fibre; 24.57&plusmn; 0.078 and 36.79&plusmn; 0.004% protein; 11.39&plusmn; 0.004 and 35.35&plusmn; 0.011% lipid. The best extrusion condition combinations were 1150C barrel temperature, 115rpm screw speed and 35% feed moisture for ash content; 1000C barrel temperature, 130rpm screw speed and 33% feed moisture for moisture content; 1150C barrel temperature, 115rpm screw speed and 35% feed moisture for fibre content; 1050C barrel temperature, 145rpm screw speed and 35% feed moisture for protein content; 1050C barrel temperature, 85rpm screw speed and 35% feed moisture for lipids. Analysis of variance showed that only barrel temperature affected the ash composition significantly (p&lt; 0.05). Barrel temperature, screw speed and feed moisture showed insignificant (p&gt; 0.05) effect on moisture content, while fibre content was significantly (p&lt; 0.05) affected by barrel temperature and screw speed. Protein and crude fat (lipid) contents were significantly (p&lt; 0.05) affected by barrel temperature, screw speed and feed moisture.

APA, Harvard, Vancouver, ISO, and other styles

44

Princewill-Ogbonna, I., and N. Ezembaukwu. "Effect of Various Processing Methods on the Pasting and Functional Properties of Aerial Yam (Dioscorea bulbifera) Flour." British Journal of Applied Science & Technology 9, no. 5 (2015): 517–26. http://dx.doi.org/10.9734/bjast/2015/17915.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Mingle, Elizabeth, Rita Elsie Sanful, and Felix Narku Engmann. "Sensory and physicochemical properties of bread made from aerial yam (Dioscorea bulbifera) and wheat (Triticum aestivum) flour." International Journal of Innovative Food Science and Technology 1, no. 1 (2017): 29–35. http://dx.doi.org/10.25218/ijifst.2017.01.001.05.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Olatoye, Kazeem Koledoye, and Gibson Lucky Arueya. "Nutrient and phytochemical composition of flour made from selected cultivars of Aerial yam (Dioscorea bulbifera) in Nigeria." Journal of Food Composition and Analysis 79 (June 2019): 23–27. http://dx.doi.org/10.1016/j.jfca.2018.12.007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Rompf, R., and G. Kahl. "An elicitor-induced cDNA from aerial yam ( Dioscorea bulbifera L.) encodes a pathogenesis-related type 4 protein." Plant Cell Reports 18, no. 7-8 (1999): 601–6. http://dx.doi.org/10.1007/s002990050629.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Zhang, Laibin, Xiaona Nie, Huihui Li, Shuangyan Guo, and Jieli Lv. "Hypoglycemic potential of the extracts and active compounds from the aerial parts of Dioscorea opposita (Chinese yam)." Journal of Functional Foods 126 (March 2025): 106707. https://doi.org/10.1016/j.jff.2025.106707.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

M.C., Ojinnaka,, Odimegwu, E.N., and Ilechukwu, R. "Functional properties of flour and starch from two cultivars of aerial yam (Dioscorea bulbifera) in South East Nigeria." IOSR Journal of Agriculture and Veterinary Science 09, no. 08 (2016): 22–25. http://dx.doi.org/10.9790/2380-0908012225.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Yoshida, Y., K. Hosogoe, H. Takahashi, H. Kanda, M. Nishiyama, and K. Kanahama. "EFFECTS OF GIBBERELLIN ON THE DEVELOPMENT OF AERIAL TUBERS IN NODE CULTURE OF CHINESE YAM (DIOSCOREA OPPOSITIFOLIA 'NAGAIMO')." Acta Horticulturae, no. 936 (August 2012): 283–88. http://dx.doi.org/10.17660/actahortic.2012.936.35.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Aerial yam'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles