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Journal articles on the topic 'Cowpea (vigna unguiculata (l.)'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Ehlers, J. D., and A. E. Hall. "Cowpea (Vigna unguiculata L. Walp.)." Field Crops Research 53, no. 1-3 (July 1997): 187–204. http://dx.doi.org/10.1016/s0378-4290(97)00031-2.

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2

Kongjaimun, Alisa, Akito Kaga, Norihiko Tomooka, Prakit Somta, Takehiko Shimizu, Yujian Shu, Takehisa Isemura, Duncan A. Vaughan, and Peerasak Srinives. "An SSR-based linkage map of yardlong bean (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) and QTL analysis of pod length." Genome 55, no. 2 (February 2012): 81–92. http://dx.doi.org/10.1139/g11-078.

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Yardlong bean (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) (2n = 2x = 22) is one of the most important vegetable legumes of Asia. The objectives of this study were to develop a genetic linkage map of yardlong bean using SSR makers from related Vigna species and to identify QTLs for pod length. The map was constructed from 226 simple sequence repeat (SSR) markers from cowpea (Vigna unguiculata (L.) Walp. subsp. unguiculata Unguiculata Group), azuki bean (Vigna angularis (Willd.) Ohwi & Ohashi), and mungbean (Vigna radiata (L.) Wilczek) in a BC1F1 ((JP81610 × TVnu457) × JP81610) population derived from the cross between yardlong bean accession JP81610 and wild cowpea (Vigna unguiculata subsp. unguiculata var. spontanea) accession TVnu457. The markers were clustered into 11 linkage groups (LGs) spanning 852.4 cM in total length with a mean distance between adjacent markers of 3.96 cM. All markers on LG11 showed segregation distortion towards the homozygous yardlong bean JP81610 genotype. The markers on LG11 were also distorted in the rice bean (Vigna umbellata (Thunb.) Ohwi & Ohashi) map, suggesting the presence of common segregation distortion factors in Vigna species on this LG. One major and six minor QTLs were identified for pod length variation between yardlong bean and wild cowpea. Using flanking markers, six of the seven QTLs were confirmed in an F2 population of JP81610 × TVnu457. The molecular linkage map developed and markers linked to pod length QTLs would be potentially useful for yardlong bean and cowpea breeding.
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3

Ogunkanmi, Adebayo, Oluwatoyin Ogundipe, Luky Omoigui, Adebola Odeseye, and Christian Fatokun. "Morphological and SSR marker characterization of wild and cultivated cowpeas (Vigna unguiculata L. Walp)." Journal of Agricultural Sciences, Belgrade 64, no. 4 (2019): 367–80. http://dx.doi.org/10.2298/jas1904367o.

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Three hundred and ninety accessions comprising 260 cultivated and 130 wild cowpea accessions were evaluated phenotypically using 27 cowpea descriptors. Morphological evaluation of some qualitative traits revealed 11.92% and 29.23% presence of pigmentation on the stem, 1.53% and 20.76% presence of stripes on the pod, and 0% and 20% presence of hairiness on the plant of cultivated and wild cowpeas respectively. As for the molecular analysis, sixteen SSR primers were employed for genotyping 48 accessions from both wild and cultivated cowpeas. The data generated a dendrogram with three clusters, two of which consisted of wild cowpea while the third cluster comprised all the cultivated cowpeas, including the yard-long-bean (Vigna unguiculata subsp. sesquipedalis) and Vigna unguiculata subsp. cylindrica accessions. Two wild accessions of subsp. dekindtiana, and one each of subsp. kgalagadensis and protracta clustered with cultivated cowpea indicating their relationships with cultivated cowpea, but not with other wild cowpeas. The numbers of polymorphic SSR bands in cultivated and wild cowpeas were 38 and 54, respectively, while the PIC values were 4.47 and 6.14, respectively, showing a greater genetic diversity in wild than in cultivated cowpeas. The subsp. dekindtiana had the highest number (80%) of shared SSR bands with cultivated cowpea followed by subsp. protracta with 54% of shared bands. Five species of wild cowpea have hairs and so could be used in breeding for resistance to insects.
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4

Ha, Tae Joung, Myoung-Hee Lee, Yu Na Jeong, Jin Hwan Lee, Sang-Ik Han, Chang-Hwan Park, Suk-Bok Pae, Chung-Dong Hwang, In-Youl Baek, and Keum-Yong Park. "Anthocyanins in cowpea [Vigna unguiculata (L.) Walp. ssp. unguiculata]." Food Science and Biotechnology 19, no. 3 (June 2010): 821–26. http://dx.doi.org/10.1007/s10068-010-0115-x.

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5

Ugale, PN, MP Wankhade, and JD Deshmukh. "Correlation studies in cowpea (Vigna unguiculata L.)." International Journal of Chemical Studies 8, no. 6 (November 1, 2020): 743–46. http://dx.doi.org/10.22271/chemi.2020.v8.i6k.10857.

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6

Vaillancourt, R. E., and N. F. Weeden. "Lack of isozyme similarity between Vigna unguiculata and other species of subgenus Vigna (Leguminosae)." Canadian Journal of Botany 71, no. 4 (April 1, 1993): 586–91. http://dx.doi.org/10.1139/b93-066.

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The cowpea (Vigna unguiculata (L.) Walp.) is an important crop of tropical Africa, Asia, and South America. However, the relationship between the cowpea and other species of subg. Vigna is relatively unknown. The objective of this study was to assess the genetic distance among species of subg. Vigna using isozymes. Twenty-four populations of the cowpea species and 39 populations from 10 other species (at least one species per section of subgenus Vigna) were sampled. Nei's genetic distance was calculated from allelic frequencies at 26 isozyme loci. UPGMA cluster analysis was performed. The range of genetic distance among species of subg. Vigna (0.41 – 2.69) was greater than previously reported in most plant genera. Three clusters of species were apparent. The first cluster included three species of sect. Vigna (V. luteola, V. oblongifolia, and V. subterranea (the Bambara groundnut)). The second cluster grouped together sections Liebrechtsia and Macrodontae. The third cluster included V. unguiculata, V. reticulata, and V. vexillata. The distances between species of this cluster were large and of similar size in all combinations (range from 0.92 to 0.95). None of the species included in this survey can be called a close relative of V. unguiculata. Key words: Vigna, cowpea, isozymes, genetic distances.
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7

Pal, A. K., B. Singh, and A. N. Maurya. "Inbreeding depression in cowpea (Vigna unguiculata (L.) Walp.)." Journal of Applied Horticulture 05, no. 02 (December 15, 2003): 105–7. http://dx.doi.org/10.37855/jah.2003.v05i02.25.

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8

CHANDRAKAR, RUPESH, ANNU VERMA, J. SINGH, and N. MEHTA. "Genetic divergence in vegetable cowpea (Vigna unguiculata L.)." ASIAN JOURNAL OF HORTICULTURE 11, no. 2 (December 15, 2016): 323–28. http://dx.doi.org/10.15740/has/tajh/11.2/323-328.

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9

Lonardi, Stefano, María Muñoz‐Amatriaín, Qihua Liang, Shengqiang Shu, Steve I. Wanamaker, Sassoum Lo, Jaakko Tanskanen, et al. "The genome of cowpea (Vigna unguiculata[L.] Walp.)." Plant Journal 98, no. 5 (May 28, 2019): 767–82. http://dx.doi.org/10.1111/tpj.14349.

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10

Badhe, P. L., D. M. Raut, N. M. Magar, D. N. Borole, and V. Y. Pawar. "Diallel analysis in Cowpea (Vigna unguiculata (L.)Walp.)." Electronic Journal of Plant Breeding 7, no. 2 (2016): 291. http://dx.doi.org/10.5958/0975-928x.2016.00037.5.

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11

Spriggs, Andrew, Steven T. Henderson, Melanie L. Hand, Susan D. Johnson, Jennifer M. Taylor, and Anna Koltunow. "Assembled genomic and tissue-specific transcriptomic data resources for two genetically distinct lines of Cowpea (Vigna unguiculata (L.) Walp)." Gates Open Research 2 (February 9, 2018): 7. http://dx.doi.org/10.12688/gatesopenres.12777.1.

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Cowpea (Vigna unguiculata (L.) Walp) is an important legume crop for food security in areas of low-input and smallholder farming throughout Africa and Asia. Genetic improvements are required to increase yield and resilience to biotic and abiotic stress and to enhance cowpea crop performance. An integrated cowpea genomic and gene expression data resource has the potential to greatly accelerate breeding and the delivery of novel genetic traits for cowpea. Extensive genomic resources for cowpea have been absent from the public domain; however, a recent early release reference genome for IT97K-499-35 (Vigna unguiculata v1.0, NSF, UCR, USAID, DOE-JGI, http://phytozome.jgi.doe.gov/) has now been established in a collaboration between the Joint Genome Institute (JGI) and University California (UC) Riverside. Here we release supporting genomic and transcriptomic data for IT97K-499-35 and a second transformable cowpea variety, IT86D-1010. The transcriptome resource includes six tissue-specific datasets for each variety, with particular emphasis on reproductive tissues that extend and support the V. unguiculata v1.0 reference. Annotations have been included in our resource to allow direct mapping to the v1.0 cowpea reference. Access to this resource provided here is supported by raw and assembled data downloads.
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12

Spriggs, Andrew, Steven T. Henderson, Melanie L. Hand, Susan D. Johnson, Jennifer M. Taylor, and Anna Koltunow. "Assembled genomic and tissue-specific transcriptomic data resources for two genetically distinct lines of Cowpea (Vigna unguiculata (L.) Walp)." Gates Open Research 2 (June 18, 2018): 7. http://dx.doi.org/10.12688/gatesopenres.12777.2.

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Cowpea (Vigna unguiculata (L.) Walp) is an important legume crop for food security in areas of low-input and smallholder farming throughout Africa and Asia. Genetic improvements are required to increase yield and resilience to biotic and abiotic stress and to enhance cowpea crop performance. An integrated cowpea genomic and gene expression data resource has the potential to greatly accelerate breeding and the delivery of novel genetic traits for cowpea. Extensive genomic resources for cowpea have been absent from the public domain; however, a recent early release reference genome for IT97K-499-35 (Vigna unguiculata v1.0, NSF, UCR, USAID, DOE-JGI, http://phytozome.jgi.doe.gov/) has now been established in a collaboration between the Joint Genome Institute (JGI) and University California (UC) Riverside. Here we release supporting genomic and transcriptomic data for two transformable cowpea varieties, IT97K-499-35 and IT86D-1010. The transcriptome resource includes six tissue-specific datasets for each variety, with particular emphasis on reproductive tissues that extend and support the V. unguiculata v1.0 reference. Annotations have been included in our resource to allow direct mapping to the v1.0 cowpea reference. The resource described here is supported by downloadable raw and assembled sequence data.
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13

Absari, Eritria Ulina, and Kuswanto Kuswanto. "Response of Some Cowpea (Vigna unguiculata L.) Genotype to Salinity Stress." PLANTROPICA: Journal of Agricultural Science 4, no. 1 (February 5, 2019): 57–67. http://dx.doi.org/10.21776/ub.jpt.2019.004.1.7.

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14

Susrama, I. Gede Ketut, and I. Gede Putu Wirawan. "IN VIVO MULTISTEP MUTAGENESIS INDUCTION USING COLCHICINE ON COWPEA MUTANT 1 (Vigna unguiculata L. Walp)." International Journal of Biosciences and Biotechnology 5, no. 2 (May 21, 2018): 118. http://dx.doi.org/10.24843/ijbb.2018.v05.i02.p04.

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In the previous research, we obtained three catagories of M1 mutant cowpea namely 1) purple pod mutant cowpea, 2) green pod mutant cowpea which has three pods in a stalk, and 3) green pod mutant cowpea which has two pods in a stalk. All those three catagories of M1 mutant cowpeas were treated again with colchicine in a multistep mutagenesis proses in vivo. Then, we found changes in number of leaflet in a petiole to 4 leaflets (quadrifoliate) and to five leaflets in a petiole (pentafoliate). These changes are indications that beside as a chromosome multipying alkaloid, colchicine causes other genetic changes as well. Through this mutagenesis research, we created gigas mutant cowpea that having longer leaves, longer pods and heavier seeds. The accurrence of two kinds of insect pests attack were found namely cowpea aphid Aphis craccivora and pod sucking bug Riptortus linearis.
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15

Nkomo, Gabriel V., Moosa M. Sedibe, and Maletsema A. Mofokeng. "Production Constraints and Improvement Strategies of Cowpea (Vigna unguiculata L. Walp.) Genotypes for Drought Tolerance." International Journal of Agronomy 2021 (March 22, 2021): 1–9. http://dx.doi.org/10.1155/2021/5536417.

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Cowpea (Vigna unguiculata L. Walp. L) is an important leguminous crop largely grown by smallholder farmers in sub-Saharan Africa for food security and animal feed. The objective of this study was to review the production constraints and improvement strategies of cowpea genotypes for drought tolerance. Data were analysed through use of literature review from various sources. In sub-Saharan Africa, cowpeas are produced mainly from West Africa, which accounts for 60% of worldwide production. A lot of pests and diseases affect cowpeas, and this often results in total crop loss. Through continuous improvement, many new cultivars are continually being identified and genetically characterised, and it is thus necessary to evaluate these new lines under different environments. There is a need for multidisciplinary collaborations among breeders and other relevant stakeholders such as farmer and extension workers because the improved cultivars must be according to the farmers preferred traits. Due to declining rainfall pattern in sub-Saharan Africa, there is an urgent requirement for cowpea breeding programmes that focus on developing varieties with short maturity, drought, pest, and disease tolerance. The present review discusses the constraints and improvement strategies of cowpea varieties for drought tolerance.
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16

Nascente, Adriano Stephan, José Dambiro, and Clérico Constantino. "Effects of grain-producing cover crops on rice grain yield in Cabo Delgado, Mozambique." Revista Ceres 64, no. 6 (December 2017): 607–15. http://dx.doi.org/10.1590/0034-737x201764060007.

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ABSTRACT Besides providing benefits to the environment such as soil protection, release of nutrients, soil moisture maintenance, and weed control, cover crops can increase food production for grain production. The aim of this study was to evaluate the production of biomass and grain cover crops (and its respective effects on soil chemical and physical attributes), yield components, and grain yield of rice in Mozambique. The study was conducted in two sites located in the province of Cabo Delgado, in Mozambique. The experimental design was a randomized block in a 2 × 6 factorial, with four repetitions. Treatments were carried out in two locations (Cuaia and Nambaua) with six cover crops: Millet (Pennisetum glaucum L.); namarra bean (Lablab purpureus (L.) Sweet), velvet beans (Mucuna pruriens L.), oloco beans (Vigna radiata (L.) R. Wilczek), cowpea (Vigna unguiculata L.), and fallow. Cover crops provided similar changes in chemical and physical properties of the soil. Lablab purpureus, Vigna unguiculata, and Mucuna pruriens produced the highest dry matter biomass. Vigna unguiculada produced the highest amount of grains. Rice grain yields were similar under all cover crops and higher in Cuaia than Nambaua.
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17

Sombié, Pierre, Moussa Compaoré, Ahmed Coulibaly, Jeremy Ouédraogo, Jean-Baptiste Tignégré, and Martin Kiendrébéogo. "Antioxidant and Phytochemical Studies of 31 Cowpeas (Vigna unguiculata (L. Walp.)) Genotypes from Burkina Faso." Foods 7, no. 9 (September 3, 2018): 143. http://dx.doi.org/10.3390/foods7090143.

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Antioxidant compounds of dietary plants have been widely studied because of their bioactive properties. The objective of this research study was to analyse the health enhancing attributes of 31 cowpeas varieties from Burkina Faso. Significant variations were observed in the phenolic content as well as the antioxidant and anti-lipid peroxidation activities amongst the cowpea varieties. Pearson correlation coefficient analysis showed that the ferric reducing ability (r = 0.954) and anti-lipid peroxidation (r = 0.616) were positively correlated with the total phenolic content. A significant relationship between cowpea ferric reducing ability and anti-lipid peroxidation (r = 0.64) was also revealed. However, nitric oxide scavenging potential was found not to be related to its total phenolic and total flavonoid content. 2,2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl radicals scavenging potentials were not correlated with the total flavonoid content. The pigmented seeds of cowpea varieties possess higher total phenolic, total flavonoid content, ferric reduction ability, and anti-lipid peroxidation activities than the colourless ones. The results obtained from this study suggest that Burkina Faso cowpea cultivars are rich in phenolic compounds and have significant antioxidant and anti-lipid peroxidation activities. Consumption of the cowpea, particularly of coloured cowpea seed varieties, should be beneficial for chronic human diseases prevention.
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18

Raut, D. M., A. B. Tamnar, S. V. Burungale, and P. L. Badhe. "Half Diallel Analysis in Cowpea [Vigna unguiculata (L.)Walp.]." International Journal of Current Microbiology and Applied Sciences 6, no. 7 (June 10, 2017): 1807–19. http://dx.doi.org/10.20546/ijcmas.2017.607.218.

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19

Gerrano, Abe S., Patrick O. Adebola, Willem S. Jansen van Rensburg, and Sunette M. Laurie. "Genetic variability in cowpea (Vigna unguiculata(L.) Walp.) genotypes." South African Journal of Plant and Soil 32, no. 3 (May 21, 2015): 165–74. http://dx.doi.org/10.1080/02571862.2015.1014435.

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20

Pasquet, R. S. "Allozyme diversity of cultivated cowpea Vigna unguiculata (L.) Walp." Theoretical and Applied Genetics 101, no. 1-2 (July 2000): 211–19. http://dx.doi.org/10.1007/s001220051471.

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21

Rai, Navreet Kaur, A. K. Sharma, A. K. Parihar, Sangeeta Pal, and Ravina Beniwal. "Genetic Divergence Analysis in Cowpea [Vigna unguiculata (L.) Walp.]." International Journal of Current Microbiology and Applied Sciences 9, no. 12 (December 10, 2020): 2241–44. http://dx.doi.org/10.20546/ijcmas.2020.912.264.

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22

OSMAN, SAYED, and HASSAN SOLTAN. "CYTOLOGICAL CHARACTERIZATION OF SOME COWPEA (VIGNA UNGUICULATA L.) ACCESSIONS." Scientific Journal of Agricultural Sciences 3, no. 1 (May 31, 2021): 131–36. http://dx.doi.org/10.21608/sjas.2021.67362.1075.

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23

Boe, A., E. K. Twidwell, and K. D. Rephart. "Growth and forage yield of cowpea and mungbean in the northern Great Plains." Canadian Journal of Plant Science 71, no. 3 (July 1, 1991): 709–15. http://dx.doi.org/10.4141/cjps91-104.

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Cowpea [Vigna unguiculata (L.) Walp.] and mungbean [Vigna radiata (L.) Wilczek] are summer-annual legumes which have potential as forages in the northern Great Plains region of the USA during late summer when cool-season grass pastures decline in productivity. The objective of this study was to evaluate forage yield and growth response of these species when grown under different row spacings and planting rates. Victor cowpea and Berken mungbean were planted at 500 000 pure live seeds (PLS) ha−1 in row spacings of 25, 50, and 75 cm at two South Dakota locations in 1987. In 1988 the two species were planted at rates of either 250 000 or 500 000 PLS ha−1 in the same row spacings at three locations. Cowpea produced higher forage yields than mungbean at all locations in both years. Yields of both species decreased with increased row spacing. Species did not differ in plant weight, but plant number per unit of harvested area was greater for cowpea than mungbean. Forage yield was not significantly affected by planting rate at any location in 1988; however, plant weight, leaflets plant−1, and leaf area plant−1 were significantly greater for the low rate, showing that forage yield remained relatively constant across wide variations in plant population. Results indicate that both cowpea and mungbean have potential as summer annual forage crops. However, the consistently higher yield performance of the cowpea cultivar suggests that it was better adapted than the mungbean cultivar to the northern Great Plains region and consequently should be a better forage crop. Key words: Vigna unguiculata (L.) Walp., Vigna radiata (L.) Wilczek, yield, plant density, cowpea, mungbean
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24

Gnankambary, Karidiatou, Nerbéwendé Sawadogo, Zakaria Diéni, Téyouré Benoit Joseph Batieno, Jean Baptiste De Salle Tignegré, Mahamadou Sawadogo, and Tinga Jeremy Ouédraogo. "Assessment of Cowpea (Vigna unguiculata (L.) Walp.) Mutant Lines for Drought Tolerance." International Journal of Agronomy 2020 (October 10, 2020): 1–9. http://dx.doi.org/10.1155/2020/8823498.

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Cowpea provides the cheapest source of protein with an average range of protein content of 23–30%. However, cowpea growth, development, and yield are greatly affected by drought during flowering and pod filling in the sub-Sahelian areas. The best way to cope with this situation is to develop drought-tolerant cowpea varieties. The objective of this study was therefore to evaluate cowpea lines developed through mutagenesis using gamma radiation to assess their reaction under optimal and water-stressed conditions. The response of ten mutants-irradiated Moussa local was then evaluated in pots arranged in a split plot design in a screen house. Two conditions were applied with optimum and water-stressed conditions. The stress was applied for two weeks at flowering. Two cowpea varieties Gorom local (drought-tolerant) and Moussa local (susceptible) nonirradiated were used as checks. Thereafter, field trials under two different sowing dates were conducted to identify the best tolerant mutant line(s) using agromorphological and tolerance indicators. The results indicated that mutant lines (MoussaM51-4P10 and MoussaM43-20P14) exhibited better stress tolerance and produced higher yield under water stress conditions. Stress Tolerance Index (STI) was better to select cowpea mutant tolerant with higher yielding under moderate stress (SI = 35%). The study confirmed that water stress has a negative effect on cowpea seeds production and on leaf chlorophyll content. The high temperature during experiment increased water stress effect mainly on non-irradiated checks (Gorom local and Moussa local).
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Fadillah, Resti, Heni Purnamawati, and Supijatno. "Produksi Kacang Tunggak (Vigna unguiculata [L.] Walp) dengan Input Pupuk Rendah." Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) 48, no. 1 (April 29, 2020): 44–51. http://dx.doi.org/10.24831/jai.v48i1.27597.

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Cowpea is prospective as a substitute for soybeans, as raw material for tempeh. In this study, low inputs of cowpea production is proposed. This study aimed to determine the effect of manure and nitrogen fertilizer on the growth and production of cowpea. The study was conducted at the Cikabayan Experimental Station, IPB, Bogor, Indonesia, from November 2018 to March 2019, using a split-plot design. As the main plot was goat manure rates consisted of 0, 2.5, and 5 tons ha-1. The subplots consisted of four rates of nitrogen, namely 0, 15, 30, and 45 kg N ha-1. The results showed that the application of manure increased the fresh weight of the leaf, the number of flower bunches, and the number of flowers. The application of N fertilizer increased leaf fresh weight, leaf area index, dry root weight, and shoot/root ratio at five weeks after planting. The combination of organic fertilizer with a dose of 2.5 tons ha-1 combined with 45 kg ha-1 nitrogen fertilizer tends to give better productivity than without fertilizer. Thus, cowpea can be produced using low input of manure and N. Keywords: leaf area index, leaf weight, flower bunches
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26

Ortiz, Rodomiro. "Cowpeas from Nigeria: A Silent Food Revolution." Outlook on Agriculture 27, no. 2 (June 1998): 125–28. http://dx.doi.org/10.1177/003072709802700210.

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Cowpeas ( Vigna unguiculata (L.) Walp.) are an important native African legume crop, whose seeds are sold in local urban and rural markets. West Africa is the main centre of diversity for cowpeas. Nigeria is the world's largest producer and second in acreage. The production trend shows a significant improvement of cowpea cultivation in this country from 1961 to 1995. In this period, Nigerian cowpea production increased by 441% according to available statistics of the United Nations Food and Agriculture Organization (FAO). This paper discusses the evolution of cowpea production from the early 1960s until recent years in Nigeria, along with new technology for cultivation (for example, improved cultivars) of this crop developed by the International Institute of Tropical Agriculture (IITA) in Nigeria.
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27

Zhu, Y. F., J. Hu, Y. Zhang, Y. J. Guan, X. X. Huang, and S. J. Zhu. "Transferability of SSR markers derived from cowpea (Vigna unguiculata L. Walp.) in variety identification." Seed Science and Technology 38, no. 3 (October 1, 2010): 730–40. http://dx.doi.org/10.15258/sst.2010.38.3.20.

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28

Ravelombola, Waltram Second, Ainong Shi, Yuejin Weng, John Clark, Dennis Motes, Pengyin Chen, and Vibha Srivastava. "Evaluation of Salt Tolerance at Germination Stage in Cowpea [Vigna unguiculata (L.) Walp]." HortScience 52, no. 9 (September 2017): 1168–76. http://dx.doi.org/10.21273/hortsci12195-17.

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Cowpea is a leguminous and versatile crop which provides nutritional food for human consumption. However, salinity unfavorably reduces cowpea seed germination, thus significantly decreasing cowpea production. Little has been done for evaluating and developing salt-tolerant cowpea genotypes at germination stage. The objectives of this research were to evaluate the response of cowpea genotypes to salinity stress through seed germination rate and to select salt-tolerant cowpea genotypes. The seed germination rates under nonsalt condition and salinity stress (150 mm NaCl) were evaluated in 151 cowpea genotypes. Four parameters, absolute decrease (AD), the inhibition index (II), the relative salt tolerance (RST), and the salt tolerance index (STI) were used to measure salt tolerance in cowpea. The results showed that there were significant differences among the 151 cowpea genotypes for all parameters (P values <0.0001). The AD in germination rate was 5.8% to 94.2%; the II varied from 7.7% to 100%; the RST ranged from 0 to 0.92; and STI varied from 0 to 0.92. A high broad sense heritability (H2) was observed for all four parameters. High correlation coefficients (r) were estimated among the four parameters. PI582422, 09–529, PI293584, and PI582570 were highly salt tolerant at germination stage. In addition, genotypes from the Caribbean and Southern Asia exhibited better tolerance to salinity, whereas those from Europe and North America were the most salt-susceptible.
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Oladejo, A. S., A. O. Bolaji, I. O. Obisesan, and O. G. Omitogun. "SDS-Page characterization of some elite cowpea (Vigna unguiculata L. Walp) varieties." Nigerian Journal of Biotechnology 36, no. 2 (March 12, 2020): 45–51. http://dx.doi.org/10.4314/njb.v36i2.6.

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The shortcomings of genotype x environment interaction necessitated the use of molecular methods in characterizing many plant species and in determining their phylogenetic relationships. In this study, some selected cowpea lines (27 varieties) from Obafemi Awolowo University, Ile – Ife, the Institute of Agricultural Research (IAR), Samaru, Kaduna and Genetic Resource Centre, IITA, Ibadan were characterized using sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) profiling. The protein banding profiles of the 27 cowpea varieties were scored and subjected to cluster analysis using Ward's minimum-variance method (WMVM) for dendrogram grouping. The dendrogram generated from the SDS-PAGE profiles grouped the varieties into seven clusters at 52% similarity coefficient. Hence, the biochemical characterization revealed more precise discrimination among the 27 cowpea varieties studied. Keywords: Cowpea, electrophoretic banding profiles, dendrogram grouping, total proteins
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30

Fatokun, Christian A., Ousmane Boukar, and Satoru Muranaka. "Evaluation of cowpea (Vigna unguiculata (L.) Walp.) germplasm lines for tolerance to drought." Plant Genetic Resources 10, no. 3 (August 9, 2012): 171–76. http://dx.doi.org/10.1017/s1479262112000214.

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Cowpea is an important grain legume crop in sub-Saharan Africa (SSA) where, on a worldwide basis, the bulk is produced and consumed. The dry savanna area of SSA is where cowpea is mostly grown under rain-fed conditions. The crop is therefore prone to drought which may occur early, mid and/or late in the cropping season. Compared with many other crops, cowpea is drought tolerant, even though drought is still a major constraint limiting its productivity in SSA. Increasing the level of drought tolerance in existing cowpea varieties grown by farmers would enable them to obtain more and stable yield from their cowpea fields. As a first step towards enhancing drought tolerance in existing cowpea varieties, 1288 lines were selected randomly from cowpea germplasm collections maintained at the International Institute of Tropical Agriculture, and evaluated for their drought tolerance at Ibadan. Drought was imposed by withdrawal of irrigation from 5 weeks after sowing. On average, drought reduced the number of days to flower by 12 d, and the mean grain yield per plant was also reduced by 67.28%. A few of the cowpea lines stayed green for up to 6 weeks after irrigation was stopped, even though some of these produced no pods when the study was terminated. Further evaluation in the screenhouse of 142 selected drought-tolerant lines helped to identify six lines that could be potential parents for developing breeding lines with enhanced drought tolerance.
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31

Webber III, Charles L., Paul M. White Jr., Caleb Dalley, Eric C. Petrie, Ryan P. Viator, and James W. Shrefler. "Kenaf (Hibiscus cannabinus) and Cowpea (Vigna unguiculata) as Sugarcane Cover Crops." Journal of Agricultural Science 8, no. 8 (July 17, 2016): 13. http://dx.doi.org/10.5539/jas.v8n8p13.

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<p>A Louisiana sugarcane field is typically replanted every four years due to declining yields, and, although, it is a costly process, it is both necessary and an opportunity to maximize the financial return during the next four year cropping cycle. Fallow planting systems (FPS) during the fallow period prior to replanting sugarcane have the potential to influence not only the following sugarcane crop, but the economics of the production system as a whole. A 2 year experiment was conducted at the USDA, ARS, Sugarcane Research Unit at Houma, LA to determine the impact of unique FPS on sugarcane production. The experiment included seven treatments; two cover crops, kenaf (<em>Hibiscus cannabinus</em> L.) and cowpeas (<em>Vigna unguiculata</em> L. Walp.), three FPS harvest treatments for each FPS crop, and a control. The experiment had four replications. Kenaf was selected as a potential cover crop due to interest in its commercial by-products and cowpea was selected due to its potential to facilitate climate friendly soils. The kenaf and cowpeas were planted on 8 May 2013. The three FPS harvest treatments included the removal of the FPS crop at 50 days after planting (DAP), the removal of the harvested FPS crop at 100 DAP, and lastly, cutting the FPS crop at 100 DAP and incorporating the plant material into the soil prior to sugarcane planting. The control treatment did not have a cover crop. Unlike kenaf, the cowpea leaf, fresh and dry weight yields (50 DAP), 19.4 and 2.5 mt/ha, respectively, decreased to 17.0 and 2.4 mt/ha (100 DAP). Although the sugarcane total recoverable sucrose (TRS) (kg/mt) was greater with the kenaf cover-crop treatment 50 DAP (120 kg/mt) compared to the cowpea treatment 50 DAP (111 kg/mt) and the cowpea 100 DAP with the residue incorporated (112 kg/ha), none of the FPS crop treatments were significantly better or worse than the control (no cover crop). The average values for the sugarcane production factors across all treatments were 95,700 stalks/ha (millable stalks), 112 mt/ha (sugarcane yield), 114 kg/mt (sugar yield per metric ton of sugarcane), and 12,841 kg/ha (sugar yield per hectare). The results demonstrate the potential use of these alternative cover crops during the fallow period prior to planting sugarcane without adversely affecting the plant cane yields.</p>
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32

Cerdeira, Antonio L., A. Wayne Cole, and Dawn S. Luthe. "Cowpea (Vigna unguiculata) Seed Protein Response to Glyphosate." Weed Science 33, no. 1 (January 1985): 1–6. http://dx.doi.org/10.1017/s0043174500083843.

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Electrophoretic analysis of storage protein accumulation in developing cowpea [Vigna unguiculata(L.) Walp. ‘Mississippi Purple’] seed indicated that a large increase in protein content per seed occurred between 10 and 11 days after flowering (DAF). Polypeptides with molecular weights of 54, 49, and 41 kilodaltons (kD) accumulated first, and one with a molecular weight of 59 kD appeared 2 days later at 13 DAF. Treatment of plants with glyphosate [N-(phosphonomethyl)glycine] when pods were 7 and 10 DAF prevented accumulation of the major storage protein polypeptides. The accumulation of these polypeptides was not inhibited as much when pods were 11, 12, or 13 DAF at the time of treatment with glyphosate. Pod length and seed fresh weight were inhibited by glyphosate treatment of plants bearing pods 7, 10, 11, and 12 DAF. Pod width, seed dry weight, and seed length were inhibited by glyphosate when plants bearing pods 7, 10, and 11 DAF were treated.
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33

Sampers, Wim. "Cowpea (Vigna Unguiculata (L.) Walp.): Traditional and Improved Cropping Methods in Northern Nigeria." Afrika Focus 2, no. 1 (January 12, 1986): 55–92. http://dx.doi.org/10.1163/2031356x-00201004.

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The present article describes the traditional cowpea cropping system in Dambatta, Kano State, Nigeria. Through a baseline survey it becomes clear that traditionally cowpea is mostly intercropped with cereals, that the importance of land preparation is marginal, that yields are low and that, in general, the technical level of the cowpea grower is low (low inputs of fertilizer and pesticide). In a second part some data are given about a project that introduced a new cowpea variety, T.V.X. – 3,236, and improved methods. It is shown that, although better yields are possible, the extension service does not succeed in motivating the farmers enough so that the outcome of the project intervention is uncertain.
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34

Cicik Lestari, Sugeng Maryanto, and Riva Mustika Anugrah. "The Effect of Fermentation on The Nutrients of Processed Cowpea (Vigna unguiculata l. Walp)." JURNAL GIZI DAN KESEHATAN 13, no. 2 (August 11, 2021): 161–67. http://dx.doi.org/10.35473/jgk.v13i2.237.

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Cowpea is a type of legume in Indonesia but utilization not optimal. Cowpea can be used as a basic of making tempeh. The purpose of the study is to know the effect of fermentation on the nutrients of processed cowpea. The design of the study was Pra Eks/imen Design with Completely Randomized Design in laboratory to test nutrients which were repeated 3 times. Data analysis used SPSS (Statistical Product Service Solution) application. The measurement of carbohydrate used anthron method, crude fiber used refluks method, total protein used kjeldhal method, and fat used soxhlet method. Nutrients of boiled cowpea is carbohydrate content of 31,21%; crude fiber content of 13,94%; total protein content of 26,71% and fat content of 7,35%. Nutrients of cowpea tempeh is carbohydrate content of 26,71%; crude fiber content 17,21%; total protein content of 15,38% and fat content of 1,44%. There are not statistical different nutrients of boiled cowpea and tempeh cowpea, but different values
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35

Lal, H., M. Rai, S. Karan, A. Verma, and D. Ram. "MULTIVARIATE HIERARCHICAL CLUSTERING OF COWPEA GERMPLASM (VIGNA UNGUICULATA (L.) WALP." Acta Horticulturae, no. 752 (September 2007): 413–16. http://dx.doi.org/10.17660/actahortic.2007.752.74.

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36

Raveendar, S., and S. Ignacimuth. "Improved Agrobacterium Mediated Transformation in Cowpea Vigna unguiculata L. Walp." Asian Journal of Plant Sciences 9, no. 5 (June 15, 2010): 256–63. http://dx.doi.org/10.3923/ajps.2010.256.263.

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37

Patel, Pushkar Singh. "Correlation and Path analysis in Cowpea [ (Vigna unguiculata (L.) Walp.) ]." International Journal of Pure & Applied Bioscience 6, no. 5 (October 30, 2018): 142–46. http://dx.doi.org/10.18782/2320-7051.6941.

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38

Khandait, Ramnarayan, P. K. Jain, Sunil Prajapati, and Pritibala Solanki. "Genetic Variability Studies of Diverse Cowpea (Vigna unguiculata L.) Genotypes." Journal of Functional And Environmental Botany 6, no. 2 (2016): 114. http://dx.doi.org/10.5958/2231-1750.2016.00017.2.

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39

Sarath, P. S., and T. Reshma. "Heterosis in Cowpea (Vigna unguiculata L. Walp) for Selected Traits." International Journal of Current Microbiology and Applied Sciences 6, no. 7 (July 10, 2017): 522–26. http://dx.doi.org/10.20546/ijcmas.2017.607.063.

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40

Olapade, A. A., G. I. Okafor, A. U. Ozumba, and O. Olatunji. "Characterization of common Nigerian cowpea (Vigna unguiculata L. Walp) varieties." Journal of Food Engineering 55, no. 2 (November 2002): 101–5. http://dx.doi.org/10.1016/s0260-8774(02)00022-5.

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41

Fawole, I. "A Nonpetiolate Leaf Mutant in Cowpea, Vigna unguiculata (L.) Walp." Journal of Heredity 79, no. 6 (November 1988): 484–87. http://dx.doi.org/10.1093/oxfordjournals.jhered.a110559.

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42

Narwal, R. P., Vinod Kumar, and J. P. Singh. "Potassium and magnesium relationship in cowpea (Vigna unguiculata (L.) Walp.)." Plant and Soil 86, no. 1 (February 1985): 129–34. http://dx.doi.org/10.1007/bf02185032.

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43

Pasquet, Remy S., Yonas Feleke, and Paul Gepts. "Cowpea [Vigna unguiculata (L.) Walp.] maternal lineages, chloroplast captures, and wild cowpea evolution." Genetic Resources and Crop Evolution 68, no. 7 (March 22, 2021): 2799–812. http://dx.doi.org/10.1007/s10722-021-01155-y.

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44

Agustin, Ika Ratna, Yunianta, and Teti Estiasih. "Characteristic of Cowpea (Vigna unguiculata) Protein Concentrates Protein Fraction on their Solubility." International Journal of ChemTech Research 13, no. 1 (2020): 30–37. http://dx.doi.org/10.20902/ijctr.2019.130104.

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Cowpea (Vigna unguiculata L. Walp) has a protein content of 22,9% to obtain the protein in high concentrations, is made as a concentrates or isolates protein. The aim of study to determine of chemical and functional properties of flour and cowpea protein concentrates on their solubility. The study uses a completely randomized design with precipitation method based on solvent, there is distilled water, 5% salt solution, alkaline solution (NaOH 0,5 N) and ethanol 70%. The result showed that cowpea protein fractions of albumin, globulin, glutelin and prolamin had different minimum and maximum solubility. Flour and cowpea protein concentrates had different chemical composition and functional properties. Flour and cowpea protein concentrates can be develop in various food product
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45

Setyowati, Mamik, and Sutoro Sutoro. "Evaluasi Plasma Nutfah Kacang Tunggak (Vigna unguiculata L.) di Lahan Masam." Buletin Plasma Nutfah 16, no. 1 (October 6, 2016): 44. http://dx.doi.org/10.21082/blpn.v16n1.2010.p44-48.

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<p>Plant genetic resources are as a source of genetic<br />variability and can be used to develop new varieties tolerant to<br />abiotic and biotic stress. Evaluation of cowpea germplasm to<br />abiotic stress, such as acidic soil has to be done to obtain<br />information of their tolerance. Cowpea germplasm collection<br />held in ICABIOGRAD was tested under acidic soil condition<br />in Jasinga, West Java and Bogor as control during March-June<br />2007. The criteria of tolerance to acidic soil was determined<br />when the grain yield of cowpea under acidic soil more than<br />80% compare to those yield under non acidic soil, while<br />susceptible to acidic soil when lower than 25%. Result of<br />experiment showed that accession of LO-3-38, Ces-41-6,<br />TVX-4661-01D-A, IT82-889-A, TV.3381-0-2j-B and Kacang<br />Tolo Loreng were tolerant to acidic soil, while Kacang Dadap<br />dan Kacang Tolo were susceptible. These accessions could be<br />used as parent materials for genetic study related to acidic soil<br />stress.</p>
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46

Rose, Judith L., and Brian A. Kahn. "USE OF COWPEA AS A GREEN MANURE TO REDUCE EXTERNAL NITROGEN INPUTS IN A FALL BROCCOLI CROP." HortScience 29, no. 7 (July 1994): 729d—729. http://dx.doi.org/10.21273/hortsci.29.7.729d.

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Cowpea [Vigna unguiculata (L.) Walp.] was grown as a green manure preceding a fall crop of broccoli [Brassica oleracea L. (Italica Group)] in 1992 and 1993. Urea was used to supply 0, 84, or 168 kg·ha-1 of supplemental nitrogen (N) to broccoli which followed cowpeas. Control broccoli plots were grown on fallowed ground and were supplied with 168 kg·ha-1 of N from urea. Cowpea incorporation added over 100 kg·ha-1 of N to the soil in both years. In 1992, treatments had no significant effect on yield of marketable broccoli heads, but average head weight was reduced in the absence of external N. In 1993, broccoli yield was reduced following cowpeas except when 168 kg·ha-1 of external N also was supplied. Broccoli which followed cowpeas was delayed in maturity by 5 to 9 days in 1993. We conclude that a preceding cowpea crop alone will not supply enough N to sustain acceptable broccoli production. Further studies will determine how much external N must be supplied when broccoli follows cowpeas, and the best timing for supplying external N. We also will Investigate possible detrimental effects of the preceding cowpea crop on the broccoli.
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47

Kline, A. S., and E. J. Anderson. "First Report of Cowpea Aphid-Borne Mosaic Potyvirus from Cowpeas Grown Commercially in the U.S." Plant Disease 81, no. 8 (August 1997): 959. http://dx.doi.org/10.1094/pdis.1997.81.8.959c.

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Cowpea aphid-borne mosaic potyvirus (CABMV) is one of several seed-borne viruses known to limit cowpea (Vigna unguiculata (L.) Walp. subsp. unguiculata) production in Africa, Europe, and Asia, but CABMV has not been reported on commercially grown cowpeas in the United States (1). However, a sesame (Sesamum indicum L.)-infecting isolate of CABMV was recently characterized from plants growing near cowpea introduction plots in Georgia (2). In February 1997, we received samples of three seed lots of cowpea cv. Chinese Red that had been harvested in southern Texas during 1996. Approximately 28% of the plants grown from these seed lots expressed strong mosaic symptoms on primary and trifoliate leaves. Viruslike symptoms were reproduced following mechanical transmission to plants of Chinese Red cowpea, Nicotiana benthamiana, and soybean (Glycine max L.) cv. Lee. When Coronet and Pinkeye Purple Hull-BVR cowpeas were inoculated with sap extracts from symptomatic Chinese Red plants, chlorotic lesions developed on inoculated leaves, but only Coronet plants supported symptomless systemic infections. Similarly inoculated plants of Chenopodium quinoa (L.) and common bean (Phaseolus vulgaris L.) cvs. Pinto and Black Valentine developed localized chlorotic lesions. In Ouchterlony gel diffusion assays, extracts from symptomatic cowpea plants did not react with antisera to blackeye cowpea mosaic potyvirus (BlCMV), cucumber mosaic cucu-movirus (CMV), southern bean mosaic sobemovirus, cowpea mosaic comovirus, cowpea severe mosaic comovirus, or cowpea chlorotic mottle bromovirus. In the indirect enzyme-linked immunosorbent assay, sap extracts from symptomatic plants reacted with antiserum to CABMV, giving OD values at A405 of 0.10 to 0.25, and reacted weakly with antiserum to BlCMV, with OD values at A405 less than 0.035. Extracts from healthy control plants gave OD values at A405 less than 0.010. No positive reactions were obtained with antisera to bean yellow mosaic potyvirus, peanut mottle potyvirus, soybean mosaic potyvirus, or CMV. To our knowledge, this is the first report of CABMV in commercially grown cowpea from the U.S. References: (1) A. G. Gillaspie et al. Plant Dis. 79:388, 1995. (2) H. R. Pappu et al. Arch. Virol. 142:1, 1997.
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48

Ibitoye, D. O., and O. A. K. Olomide. "Vegetative Propagation of Cowpea [Vigna unguiculata (L.) Walp] for Increased Seed Production." Plant Breeding and Seed Science 74, no. 1 (December 1, 2016): 93–97. http://dx.doi.org/10.1515/plass-2016-0018.

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Abstract Large number of parental plants are required during hybridization in order to generate enough progeny needed for evaluation. Cowpea is propagated through seeds, this increases the waiting period as the plant has to complete its juvenile phase before flowering. Asexual propagation approach was employed on cowpea using the vine cuttings of flowering plants. The vine cuttings were planted in sterilized top soil and they began flowering 14 days after cutting without adding fertilizer. Success was obtained using this method which increases the rate at which the hybrids needed for multi-location trial were obtained.
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49

Adigun, Joseph Aremu, Olusegun Raphael Adeyemi, Olumide Samuel Daramola, and Patience Mojibade Olorunmaiye. "Response of cowpea (Vigna unguiculata, L., Walp) to inter-row spacing and weed competition." Agricultura Tropica et Subtropica 53, no. 2 (June 1, 2020): 73–79. http://dx.doi.org/10.2478/ats-2020-0008.

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AbstractWeed infestation is one of the major factors attributed for the poor yield of cowpea in Nigeria and other parts of sub-Sahara Africa (SSA). Field trials were therefore conducted to evaluate the effect of row spacing and different weeding levels on weed control, growth and yield of cowpea during the early and late wet seasons of 2009. In both seasons, the use of 60 cm row spacing resulted in significant (P < 0.05) reduction in weed density by 18 – 39% and weed biomass by 17 – 27% with subsequent increase in cowpea growth and grain yield than 75 and 90 cm row spacing. Cowpea grain yield increased by 67 – 109% in the early season and 24 – 56% in the late season at 60 compared to 75 and 90 cm row spacing. Hoe weeding reduced weed growth significantly in both seasons with the lowest weed density and biomass recorded in plots weeded thrice. However, this was not significantly different from weed density and biomass recorded with two weedings in both seasons. Hoe weeding twice resulted in optimum growth and grain yield of cowpea. An additional weeding, however, did not improve cowpea growth and yield in both seasons. The results of this study showed that narrow (60 cm) inter-row spacing and two hoe weedings at 3 and 6 weeks after sowing (WAS) will improve weed control and productivity of cowpea. Additional weeding is considered superfluous.
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50

PARARAJASINGHAM, S., and D. P. KNIEVEL. "NITROGENASE ACTIVITY OF COWPEA (Vigna unguiculata (L.) Walp.) DURING AND AFTER DROUGHT STRESS." Canadian Journal of Plant Science 70, no. 1 (January 1, 1990): 163–71. http://dx.doi.org/10.4141/cjps90-018.

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Greenhouse experiments were conducted with the objectives (1) to investigate the nitrogenase activity (NA) of cowpea (Vigna unguiculata (L.) Walp.) root nodules during the development of and subsequent recovery from drought stress and (2) to determine whether the changes in NA during and following drought stress are related to nodule water potential. Nitrogenase activity of root nodules decreased by more than 80% within 6–8 d of withholding water and recovered 1 or 2 d after watering. Nodule water potential declined significantly from approximately −0.2 MPa to −0.48 MPa with 8 d of stress and recovered to prestress levels within 24 h after watering. Midday abaxial stomatal conductance decreased significantly with stress but recovered within 24 h following watering. Midday leaf water potential did not change significantly during the experimental period. Nodule NA declined 2 d before that of nodule water potential in apparent response to declining soil water content. This response and the lag in the recovery of NA following drought stress after nodule water potential had returned to prestress levels support the hypothesis that nodule water potential per se is not the primary cause for the decline in NA of cowpea root nodules during drought stress.Key words: Vigna unguiculata (L.) Walp., nitrogenase activity, drought stress, recovery, cowpea
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