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Journal articles on the topic 'Quality protein maize (QPM)'

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Published: 2 June 2025

Last updated: 31 July 2025

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1

Ignjatovic-Micic, Dragana, Goran Stankovic, Ksenija Markovic, Vesna Lazic-Jancic, and Miloje Denic. "Quality protein maize: QPM." Genetika 40, no. 3 (2008): 205–14. http://dx.doi.org/10.2298/gensr0803205i.

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Quality protein maize (QPM) contains the opaque-2 gene along with numerous modifiers for kernel hardness. Therefore, QPM is maize with high nutritive value of endosperm protein, with substantially higher content of two essential amino acids - lysine and tryptophan, and with good agronomical performances. Although QPM was developed primarily for utilization in the regions where, because of poverty, maize is the main staple food, it has many advantages for production and consumption in other parts of the world, too. QPM can be used for production of conventional and new animal feed, as well as f

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Bhargava, Kotte, P. Bhavana, Raveendra N. Gadag, et al. "Breeding strategies for quality protein maize: A Review." Emergent Life Sciences Research 10, no. 01 (2024): 19–32. http://dx.doi.org/10.31783/elsr.2024.1011932.

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Zein proteins in maize seeds regulate food and feed quality and belong to several subfamilies. Most maize prolamin is α-zeins, which are rich in glutamine, leucine, and proline but lacking in critical amino acids (lysine and tryptophan). RNAi experiments show that 22kD zeins downregulate the quality protein maize (QPM) phenotype, not 19kD. The opaque-2 mutation caused a chalky, soft endosperm and many defects. QPM genotypes with opaque-2 alleles and firm kernels were improved. As opaque-2 is recessive and biochemical lysine and tryptophan analysis is costly, conventional backcrossing alone is

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Olowookere, B.T., E.O. Uyovbisere, W.B. Malgwi, and A.A. Oyerinde. "Protein Contents of Maize Varieties (QPM and Normal Maize) as Influenced by Nitrogen and Micronutrients." Greener Journal of Biological Sciences 7, no. 6 (2017): 50–59. https://doi.org/10.15580/GJBS.2017.6.102117156.

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Field experiments were conducted in 2008 and 2009 in the Guinea savanna ecology of Nigeria to investigate the protein content of maize varieties (QPM and normal varieties) as influenced by nitrogen fertilizer and micronutrients. The treatments were four rates of inorganic fertilizer N (0, 50, 100, 150kgNha<sup>-1</sup>) and two rates of cocktail micronutrient mixtures. These were tested in a randomized complete block design with three replications and the treatments were factorially combined. The results from the study revealed that micronutrients application increased the lysine and tryptopha

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Amegbor, Isaac, Angeline van Biljon, Nemera Shargie, Amsal Tarekegne, and Maryke Labuschagne. "Identifying Quality Protein Maize Inbred Lines for Improved Nutritional Value of Maize in Southern Africa." Foods 11, no. 7 (2022): 898. http://dx.doi.org/10.3390/foods11070898.

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Malnutrition, as a result of deficiency in essential nutrients in cereal food products and consumption of a poorly balanced diet, is a major challenge facing millions of people in developing countries. However, developing maize inbred lines that are high yielding with enhanced nutritional traits for hybrid development remains a challenge. This study evaluated 40 inbred lines: 26 quality protein maize (QPM) lines, nine non-QPM lines, and five checks (three QPM lines and two non-QPM lines) in four optimum environments in Zimbabwe and South Africa. The objective of the study was to identify good-

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Panlasigui, Leonora N., Cecile L. T. Bayaga, Erniel B. Barrios, and Kim L. Cochon. "Glycaemic Response to Quality Protein Maize Grits." Journal of Nutrition and Metabolism 2010 (2010): 1–6. http://dx.doi.org/10.1155/2010/697842.

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Background. Carbohydrates have varied rates of digestion and absorption that induces different hormonal and metabolic responses in the body. Given the abundance of carbohydrate sources in the Philippines, the determination of the glycaemic index (GI) of local foods may prove beneficial in promoting health and decreasing the risk of diabetes in the country.Methods. The GI of Quality Protein Maize (QPM) grits, milled rice, and the mixture of these two food items were determined in ten female subjects. Using a randomized crossover design, the control bread and three test foods were given on separ

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Sandeep P. Dawange and S. K. Jha. "Moisture Dependent Physical Properties of Quality Protein Maize." Journal of Agricultural Engineering (India) 56, no. 3 (2019): 194–211. http://dx.doi.org/10.52151/jae2019563.1689.

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Physical properties of quality protein maize (var. HQPM-1 and Vivek QPM) kernels were evaluated as a function of moisture content in the range of 15- 45 % (w.b.). Length, width, and thickness of HQPM increased linearly from 10.09 mm to 10.35 mm, 8.05 mm to 8.44 mm, and 4.45 mm to 4.93 mm, respectively. The increase in dimensions of Vivek QPM was from 9.93 mm to 10.51 mm, 8.11 mm to 8.53 mm, and 4.25 mm to 4.76 mm, respectively. Sphericity, surface area, and volume of both QPM varieties increased linearly with moisture content. True density decreased from 1210.81 kg.m-3 to 1193.0 kg.m-3 for HQP

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Garrido Balam, Mariel, Luis Antonio Chel Guerrero, Arturo Francisco Castellanos Ruelas, Yolanda Moguel Ordoñez, and David Abram Betancur Ancona. "Extraction and characterization of proteins present in concentrates from quality protein maize (QPM)." Revista Colombiana de Investigaciones Agroindustriales 10, no. 2 (2023): 76–07. http://dx.doi.org/10.23850/24220582.5809.

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Quality protein maize (QPM) represents an alternative protein source for food. This work aims to characterize fractions, molecular weights, and thermal stability of the proteins present in QPM protein concentrates obtained by isoelectric precipitation. Flours from two treatments, non-nixtamalized and nixtamalized, as well as three types of maize varieties: Sac Beh (QPM white), Chichén Itzá (QPM yellow), and Blanco Uxmal (control), were obtained. The experiment was conducted using a bifactorial 2x3 design. Four isoelectric precipitation pHs were evaluated, having the highest yield and maximum p

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Kostadinović, Marija, Jelena Vančetović, Nenad Delić, and Dragana Ignjatović-Micić. "Effects of adapted quality protein maize on broiler performance." Acta agriculturae Serbica 29, no. 57 (2024): 57–61. http://dx.doi.org/10.5937/aaser2357057k.

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Quality protein maize (QPM) has high contents of the essential amino acids lysine and tryptophan. The substitution of standard maize (SM) with QPM in feeds can be profitable due to improved livestock performance and decreased use of costly dietary lysine supplementation and protein ingredients. Herein, effects of QPM adapted to temperate climate on broiler performance were tested. A feeding experiment was performed on control (fed with SM) and treatment (fed with QPM) broilers. Each feeding trial of 42 days' duration was carried out in three phases-starter (1-14), grower (15-35) and finisher (

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Spaner, D., D. E. Mather, and R. I. Hamilton. "Genetic and agronomic evaluation of short-season Quality Protein Maize." Canadian Journal of Plant Science 72, no. 4 (1992): 1171–81. http://dx.doi.org/10.4141/cjps92-143.

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Development of early-maturing hybrid cultivars of Quality Protein Maize (QPM), a hard-endosperm high-lysine maize (Zea mays L.), could provide a balanced-protein alternative feed crop for northern temperate areas. A set of inbred lines derived from QPM germplasm was used as the base population for three experiments conducted in eastern Canada: an eight-parent one-half diallel analysis, an evaluation of inbred performance, and an evaluation of resistance to Fusarium ear rot. In the diallel analysis, general combining ability effects were significant for grain yield, moisture at harvest, and ker

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Garrido-Balam, Mariel, Luis Chel Guerrero, Wilbert Rodríguez-Canto, Yolanda Moguel-Ordoñez, Jorge Antonio Uribe-Calderón, and David Betancur-Ancona. "Techno-functional properties of quality protein maize (QPM) (Zea mays L.) protein concentrates." International Food Research Journal 31, no. 2 (2024): 423–32. http://dx.doi.org/10.47836/ifrj.31.2.13.

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Nowadays, new strategies and alternatives are being implemented to improve the protein quality of foods containing essential amino acids, like quality protein maize (QPM). The techno-functional properties of protein concentrate from QPM maize: Sac Beh (SB), Chichen Itza (ChI), and Blanco Uxmal (BU); non-nixtamalized (NN) and nixtamalized (N), were evaluated in the present work. The non-nixtamalized varieties showed higher amounts of protein in the QPM ChI (86.81%) and nitrogen solubility of 64.94% as the pH increased to 9. The emulsifying capacity was higher at pH 5 (60.74%). The non-nixtamali

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Singh, Alla, Chikkappa Karjagi, Sehgeet Kaur, et al. "Characterization of phi112, a Molecular Marker Tightly Linked to the o2 Gene of Maize, and Its Utilization in Multiplex PCR for Differentiating Normal Maize from QPM." Genes 14, no. 2 (2023): 531. http://dx.doi.org/10.3390/genes14020531.

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Quality Protein Maize (QPM) contains higher amounts of essential amino acids lysine and tryptophan. The QPM phenotype is based on regulating zein protein synthesis by opaque2 transcription factor. Many gene modifiers act to optimize the amino acid content and agronomic performance. An SSR marker, phi112, is present upstream of the opaque2 DNA gene. Its analysis has shown the presence of transcription factor activity. The functional associations of opaque2 have been determined. The putative transcription factor binding at phi112 marked DNA was identified through computational analysis. The pres

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Gunaratna, Nilupa, Debebe Moges, and Hugo De Groote. "Biofortified Maize Can Improve Quality Protein Intakes among Young Children in Southern Ethiopia." Nutrients 11, no. 1 (2019): 192. http://dx.doi.org/10.3390/nu11010192.

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Quality protein maize (QPM) varieties are biofortified, or nutritionally improved, to have higher lysine and tryptophan levels to increase quality protein intakes particularly among young children. This study assesses adequacy of children’s protein intakes in Ethiopia, where QPM is being promoted, accounting for protein quality and seasonal dietary changes, and estimates potential increases in intakes if QPM replaced conventional maize in diets. Diets of randomly sampled children aged 12–36 months in rural southern Ethiopia (n = 218) were assessed after harvest during relative food security an

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Chapagain, T., B. Khatri, P. Bhattarai, B. Luitel, G. Ortiz-Ferrara, and R. Sharma. "Maximizing productivity and improving nutrition through intercropping quality protein maize and potato." Acta Agronomica Hungarica 60, no. 3 (2012): 221–30. http://dx.doi.org/10.1556/aagr.60.2012.3.5.

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Intercropping potato with quality protein maize (QPM) could improve the livelihood and nutritional status of the resource-poor farmers who produce and consume them. A study was conducted from 2008 to 2010 to assess the performance of three improved potato varieties in an intercropping system with an improved QPM in the high hills of Nepal. The QPM was sown for four consecutive weeks following potato planting. The commercial potato varieties Janak Dev, Kufri Jyoti and Khumal Seto-1 were used, while the improved QPM was Poshilo Makai-1. Delayed intercropping caused a reduction in the maize yield

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Lawal, Bosede Olukemi, Olukemi Titilola Ayoola, and Subuola Bosede Fasoyiro. "Evaluation of Agronomic and Sensory Attributes of Quality Protein Maize for Acceptability in South-Western Nigeria." Agricultura Tropica et Subtropica 47, no. 4 (2014): 131–36. http://dx.doi.org/10.2478/ats-2014-0018.

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Abstract Quality Protein Maize (Zea mays L.) (QPM) varieties have been developed by scientists at the Institute of Agricultural Research and Training in Nigeria. For these varieties to have significant impact, they must possess traits acceptable to farmers. A study was carried out to evaluate the agronomic and sensory traits of two Quality Protein Maize - ART-98-SW-6-OB (QPM1) and ILE-1-OB (QPM2), in comparison with ART-96-SW-1 (High Protein Maize) and SUWAN-1-SR (a popularly grown improved variety) in three maize growing communities of South West, Nigeria. Sixty (60) farmers comprising males

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Adedayo, Adetumbi, and Olakojo Adelowo. "Storage Potentials and Tolerance of High Protein Maize (HPM) and Quality Protein Maize (QPM) to Seed Storage Pests in Controlled Environment." Journal of Plant Protection Research 50, no. 1 (2010): 67–71. http://dx.doi.org/10.2478/v10045-010-0012-6.

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Storage Potentials and Tolerance of High Protein Maize (HPM) and Quality Protein Maize (QPM) to Seed Storage Pests in Controlled EnvironmentStudies on seed storage were conducted at seed processing and storage section of the Institute of Agricultural Research and Training, Obafemi Awolowo University, Moor Plantation, Ibadan Nigeria in 2007 and 2008, to evaluate High protein maize (HPM) seed for resistance/tolerance to storage insect pest, and assess the resultant effect of seed treatment chemicals on its germination potential. Seeds of HPM variety (ART-98-SW1) and Quality protein maize (QPM) v

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Minjarez, Benito, Yury Rodríguez-Yáñez, Eiko Osawa-Martínez, et al. "Proteomic profiling of Quality Protein Maize kernels using mass spectrometry." Maydica 65, no. 1 (2020): M10. https://doi.org/10.5281/zenodo.10637604.

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Maize (Zea mays L.) is the third most crucial crop worldwide and is of paramount importance in both humans and livestock diets. Conventional maize varieties have less than half of the amino acids recommended for human nutrition, and this deficiency results in an imbalance of amino acids and low protein content, which has been associated with several pathologies, including malnutrition. Thus, different countries have focused on research on fortified foods, such as quality protein maize (QPM) noting that these improved varieties may contain up to 100% more essential amino acids residues than con

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Kostadinovic, Marija, Dragana Ignjatovic-Micic, Goran Stankovic, Jelena Vancetovic, Danijela Ristic, and Snezana Mladenovic-Drinic. "Genetic and biochemical characterization of parental inbred lines in marker assisted selection for quality protein maize." Genetika 46, no. 2 (2014): 579–90. http://dx.doi.org/10.2298/gensr1402579k.

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Maize protein is deficient in two essential amino acids, lysine and tryptophan. Naturally occurring opaque2 (o2) mutation which increases the levels of tryptophan and lysine in the grain also confers an undesirable phenotype leading to low yields and more susceptible, soft and chalky kernels. Quality Protein Maize (QPM) is agronomically acceptable and nutritionally improved opaque2 maize. Marker assisted selection increases reliability and efficiency, reduces time and costs taken to obtain QPM. The results presented in this paper are a part of the Maize Research Insitute project on conversion

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Ayinde, Opeyemi E., Tahirou Abdoulaye, Olatunji Y. Ambali, and Grace O. Akinsola. "Determinants of the Adoption of Quality Protein Maize among Farming Households in Niger State, Nigeria." Annals of Science and Technology 2, no. 1 (2017): 8–12. http://dx.doi.org/10.2478/ast-2018-0002.

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AbstractThe study was conducted to examine the determinants of quality protein maize (QPM) adoption among farming households in Niger State, Nigeria. A twostage random sampling procedure was employed to obtain data from selected 120 maize farming households. Descriptive statistics, logistic and tobit regression models were used for the analysis. Results of the analysis show that the awareness and adoption level of QPM production in the study area were 95% and 87% respectively. Among the determinants of QPM adoption status, the coefficient of age (-0.12734) and primary occupation (-1.38295) of

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Kostadinovic, Marija, Danijela Ristic, Sofija Bozinovic, Olivera Djordjevic-Melnik, Dragana Ignjatovic-Micic, and Jelena Vancetovic. "Marker assisted conversion of maize inbred lines to quality protein maize (GPM) adapted to temperate climate." Genetika 54, no. 2 (2022): 947–57. http://dx.doi.org/10.2298/gensr220947k.

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Maize is a poor source of protein both for humans and monogastric animals due to the lack of essential amino acids, such as lysine and tryptophan. Naturally occurring opaque2 (o2) mutation increases content of these amino acids, but also confers an undesirable phenotype leading to low yields. Quality protein maize (QPM) is agronomically acceptable and nutritionally improved opaque2 maize obtained through conventional breeding. Marker assisted breeding program aimed at developing QPM genotypes for growing in temperate regions is being conducted at Maize Research Institute Zemun Polje (MRIZP). T

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-Ignjatovic-Micic, Dragana, Goran Stankovic, Ksenija Markovic, Snezana Mladenovic-Drinic, Vesna Lazic-Jancic, and Miloje Denic. "Kernel modifications and tryptophan content in QPM segregating generations." Genetika 42, no. 2 (2010): 267–77. http://dx.doi.org/10.2298/gensr1002267m.

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Maize has poor nutritional value due to deficiency of two essential amino acids - tryptophan and lysine. Although recessive opaque2 (o2) mutation significantly increases their content in the endosperm, incorporation of opaque2 into high yielding cultivars was not commercially successful, because of its numerous agronomic and processing problems due to soft endosperm. Quality protein maize - QPM has lately been introduced as opaque2 maize with improved endosperm hardness and improved agronomic traits, but mostly within tropical and subtropical germplasm. The ongoing breeding project at MRI incl

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Graham, George G., Jorge Lembcke, and Enrique Morales. "Quality-Protein Maize as the Sole Source of Dietary Protein and Fat for Rapidly Growing Young Children." Pediatrics 85, no. 1 (1990): 85–91. http://dx.doi.org/10.1542/peds.85.1.85.

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Earlier studies demonstrated that quality protein maize (QPM), with increased lysine and tryptophan and decreased leucine contents, was more digestible and supported 45% greater nitrogen retention than common maize. Ten recovering malnourished children (ages 13 to 29 months, height-ages 5 to 15 months, weight-ages 3 to 11 months) have now received 90% of their diet energy and 100% of protein and fat from QPM. Energy intake was adjusted to allow them to reach the 50th centile of weight-for-length (according to the National Center for Health Statistics) in 90 days (two completed 60 days only). G

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Mageto, Edna K., Michael Lee, Thanda Dhliwayo, et al. "An Evaluation of Kernel Zinc in Hybrids of Elite Quality Protein Maize (QPM) and Non-QPM Inbred Lines Adapted to the Tropics Based on a Mating Design." Agronomy 10, no. 5 (2020): 695. http://dx.doi.org/10.3390/agronomy10050695.

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Genetic improvement of maize with elevated levels of zinc (Zn) can reduce Zn deficiency among populations who rely on maize as a staple. Inbred lines of quality protein maize (QPM) and non-QPM with elevated Zn levels in the kernel have been identified. However, information about the optimal strategy to utilize the germplasm in breeding for high-Zn concentration is lacking. As a preliminary step, this study was conducted to ascertain the potential of QPM, non-QPM, or a combination of QPM and non-QPM hybrids for attaining desirable Zn concentration. Twenty elite inbreds, 10 QPM and 10 non-QPM, w

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Mankad, Pooja M. "Nutritional and Phytonutrient Analysis of QPM and Normal Maize Inbred Lines." Indian Journal of Pure & Applied Biosciences 12, no. 1 (2024): 7–14. http://dx.doi.org/10.18782/2582-2845.9040.

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Investigations were carried out to characterize twenty maize inbreds at biochemical levels among QPM and normal maize lines for their effective utilization in the breeding program. Proximate analysis was carried out to study the nutritional quality of maize inbred lines based on lysine and tryptophan levels among the two groups. The nutritional composition includes lysine, tryptophan, moisture, oil, crude protein, starch and total soluble sugars, showing significant differences between QPM and normal maize inbreds, while fibre and total ash content showed little variation. Phytonutrients showe

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Sewando, Ponsian, and Theresia Gregory. "Adoption of Quality Protein Maize Technology in Hai and Babati Districts, Tanzania." Asian Journal of Advances in Agricultural Research 21, no. 3 (2023): 7–13. http://dx.doi.org/10.9734/ajaar/2023/v21i3417.

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Technology adoption is a crucial driver of economic growth. The paper assesses the acceptance of quality protein maize (QPM) among farmers in the Hai and Babati districts Tanzania. The study used a random sample of 120 smallholder maize farmers in four villages to collect information regarding the adoption of QPM in the study area. The study employed descriptive statistics to analyse the data collected. The results show that only 25% of the sampled farmers have adopted and are still using the technology. This outcome has a low adoption rate. The study recommends that the government ensure farm

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Almajiri, M. I., Doma, U. D., and Mai, H. M. "PERFORMANCE AND COST BENEFIT OF BROILER CHICKENS FED DIETARY LEVELS OF QUALITY PROTEIN MAIZE AS REPLACEMENT FOR NORMAL MAIZE." Nigerian Journal of Agriculture and Agricultural Technology 3, no. 1 (2023): 97–103. http://dx.doi.org/10.59331/njaat.v3i1.458.

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An experiment was carried out to evaluate the performance and cost benefits of broiler chickens fed dietary levels of Quality Protein Maize (QPM) as replacement for normal maize. Five diets were formulated in which QPM replaced normal maize at 0, 25, 50, 75 and 100% levels. The diets were designated as D1, D2, D3. D4 and D5, respectively. Two hundred and forty (240) day-old Abor Acre broiler chickens were allotted to 5 diets in replicates of 4 containing 12 birds each in a completely randomized design. Feed and water were provided ad libitum and the study lasted for 42 days. Results showed a s

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Donato, Katherine, Margaret McConnell, Dan Han, et al. "Behavioural insights to support increased consumption of quality protein maize by young children: a cluster randomised trial in Ethiopia." BMJ Global Health 5, no. 12 (2020): e002705. http://dx.doi.org/10.1136/bmjgh-2020-002705.

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IntroductionBiofortified crops have tremendous potential to improve child nutrition. We tested whether complementing the distribution of quality protein maize (QPM) with a package of interventions informed by behavioural insights could support greater consumption of QPM by young children and translate into improved growth.MethodsWe conducted a cluster-randomised trial in Oromia, Ethiopia. Clusters of households with a child between 6 and 35 months were randomised into an arm receiving QPM seed only (320 households, 203 clusters) or an arm receiving QPM seed and a child consumption targeting in

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Kundu, Poonam, Rajesh Dahiya, and Beena Yadav. "Enhance Nutrition Security through Quality Protein Maize (QPM)." International Journal of Current Microbiology and Applied Sciences 8, no. 11 (2019): 80–84. http://dx.doi.org/10.20546/ijcmas.2019.811.009.

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HELEENA JATI* , SARITA MISHRA, SALONI CHAUHAN and ROJA GHOSH. "EFFECT OF PROCESSING ON THE PHYSICO-CHEMICAL PARAMETERS AND PROXIMATE COMPOSITION OF QUALITY PROTEIN MAIZE FLOUR." Journal of Research ANGRAU 51, no. 4 (2024): 138–48. http://dx.doi.org/10.58537/jorangrau.2023.51.4.16.

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The purpose of the study (2022) is to compare QPM maize flour’s physico-chemical composition before and after processing. A bag of 12 kg of QPM of the Shaktiman-5 variety was purchased. The gathered maize grains were cleaned by sifting out any remaining foreign material and sick or damaged seeds. In case of processing, the remaining 10 kg of maize grains were split into four equal sets in duplicate. There were 2.5 kg of corn grains in each replica. One set was preserved as the control (in triplicate) out of the four sets (in triplicate) for the study. In case of processing, the other three set

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Neupane, Saraswati, Subash Subedi, Prazwal Neupane, and Ramesh Kumar Shrestha. "Screening of Maize Genotypes against Maize Leaf Aphid [Rhopalosiphum maidis (Fitch)] under Field Condition at Chitwan, Nepal." Journal of Nepal Agricultural Research Council 8 (May 9, 2022): 1–6. http://dx.doi.org/10.3126/jnarc.v8i.44806.

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Thirty maize genotypes including five hybrids, eight quality protein (QPM) and seventeen full season open pollinated (OP) were screened for their resistance against maize leaf aphid (Rhopalosiphum maidis Fitch) at the research field of National Maize Research Program, Rampur, Chitwan, Nepal during the year 2019 and 2020. The design of the experiment was randomized incomplete block with three replications. The plot size was 2 rows of 5 m long with the spacing of 60 cm × 25 cm. The recommended dose of fertilizer for full season OP and QPM were 120:60:40 and for hybrid maize 180:60:40 N: P2O5:K2O

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Rugema, Hilary. "Promotion of Quality Protein Maize as a strategic solution to Addressing Food and Nutrition Security: The legacy of Dr. Wayne Haag." African Journal of Food, Agriculture, Nutrition and Development 14, no. 4 (2014): 1–9. http://dx.doi.org/10.18697/ajfand.64.cy033.

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Quality protein maize (QPM) contains nearly twice as much usable protein as other maize varieties and yields 10% more grain than traditional varieties of maize. It was developed by Dr. Surinder Vasal and Dr. Evangelina Villegas at the International Maize and Wheat Improvement Centre (CIMMYT) in the late 1990s. For their achievement, they won the 2000 World Food Prize

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Denic, Miloje, Pedro Chaque, Pedro Fato, Constantino Senete, David Mariote, and Wayne Haag. "Approaches in breeding for high quality protein maize." Genetika 40, no. 3 (2008): 237–47. http://dx.doi.org/10.2298/gensr0803237d.

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Maize is the principal crop and major staple food in the most African and South American countries. The main problem in human nutrition in developing countries, and in livestock feed in developed countries, is insufficient production and poor quality of cereal proteins. In the case of maize, due to the very low content of essential amino acids lysine and tryptophan in grain endosperm, biological value is very low, which is main limiting factor of common maize in human nutrition and feeding of monogastric animals. Quality protein maize (QPM) can help in solving of this problem. Maize production

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Liu, Hongjun, Junpeng Shi, Chuanlong Sun та ін. "Gene duplication confers enhanced expression of 27-kDa γ-zein for endosperm modification in quality protein maize". Proceedings of the National Academy of Sciences 113, № 18 (2016): 4964–69. http://dx.doi.org/10.1073/pnas.1601352113.

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The maize opaque2 (o2) mutant has a high nutritional value but it develops a chalky endosperm that limits its practical use. Genetic selection for o2 modifiers can convert the normally chalky endosperm of the mutant into a hard, vitreous phenotype, yielding what is known as quality protein maize (QPM). Previous studies have shown that enhanced expression of 27-kDa γ-zein in QPM is essential for endosperm modification. Taking advantage of genome-wide association study analysis of a natural population, linkage mapping analysis of a recombinant inbred line population, and map-based cloning, we id

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Regmi, Aradhana, Dikshya Niraula, Upasana Shrestha, Suraj Shrestha, and Bishnu Prasad Kandel. "Evaluation of performance and genetic parameters in quality protein maize genotypes." Journal of Agriculture and Natural Resources 5, no. 1 (2022): 52–62. http://dx.doi.org/10.3126/janr.v5i1.50514.

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Quality protein maize (QPM) contains opaque-2 mutant genes that increases lysine and tryptophan level which are not normally found in maize. The objective of this study was to evaluate the performance of QPM genotype based on their yield, yield attributing and other relevant characteristics. A varietal trial on QPM was conducted in the research field of Lamahi municipality-3, Dang, Nepal from February to June 2021. This experiment was performed in Randomized Complete Block Design with three replications. Thirteen genotypes of QPM and one standard check (Poshilo Makai-2) were evaluated. Each ge

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Amegbor, Isaac Kodzo, Angeline van Biljon, Nemera Shargie, Amsal Tarekegne, and Maryke T. Labuschagne. "Heritability and Associations among Grain Yield and Quality Traits in Quality Protein Maize (QPM) and Non-QPM Hybrids." Plants 11, no. 6 (2022): 713. http://dx.doi.org/10.3390/plants11060713.

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Maize (Zea mays L.) is the main staple cereal food crop cultivated in southern Africa. Interactions between grain yield and biochemical traits can be useful to plant breeders in making informed decisions on the traits to be considered in breeding programs for high grain yield and enhanced quality. The objectives of this study were to estimate the heritability of grain yield and its related traits, as well as quality traits, and determine the association between quality protein maize (QPM) with non-QPM crosses. Grain yield, and agronomic and quality trait data were obtained from 13 field trials

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Adeoluwa, Olusola Oluyinka, Charles Shelton Mutengwa, Cornelius Chiduza, and Ngoune Liliane Tandzi. "Nitrogen Use Efficiency of Quality Protein Maize (Zea mays L.) Genotypes." Agronomy 12, no. 5 (2022): 1118. http://dx.doi.org/10.3390/agronomy12051118.

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Use of more nutrient-use efficient Quality Protein Maize (QPM) varieties will likely play a pivotal role in maintaining or increasing crop yields and nutritional values in fields where soils are degraded. This study aimed to: (i) assess the nitrogen use efficiency (NUE) of different QPM inbred lines at various levels of nitrogen (N) fertilizer application; (ii) determine the relationships among NUE indices and yield; and (iii) determine the appropriate rate of fertilizer application for QPM genotypes under conditions of this study. Thirty-two QPM inbred lines were evaluated at 0, 30, 60, 90 an

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González-Núñez, David Guillermo, Karen Virginia Pineda-Hidalgo, Nancy Yareli Salazar-Salas, and José Angel López-Valenzuela. "Mecanismos asociados con la modificación del endospermo en maíz de calidad proteínica." Biotecnia 25, no. 2 (2023): 79–89. http://dx.doi.org/10.18633/biotecnia.v25i2.1905.

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Protein quality maize (QPM) combines the protein quality of the opaque-2 (o2) mutant with a vitreous endosperm. These characteristics have allowed breeding programs worldwide to produce QPM genotypes that help alleviate malnutrition of people in developing countries from Africa, Asia and Latin America with a cereal-based diet. However, the development of these materials has been inefficient due to the limited knowledge about the molecular basis of the conversion of the soft o2 endosperm into a vitreous phenotype in QPM. This conversion has been associated with an increase in small protein bodi

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N. Tandzi, Liliane, Charles S. Mutengwa, Eddy L. M. Ngonkeu, Noé Woïn, and Vernon Gracen. "Breeding for Quality Protein Maize (QPM) Varieties: A Review." Agronomy 7, no. 4 (2017): 80. http://dx.doi.org/10.3390/agronomy7040080.

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Tripathy, Swapan K., Dinesh M. Ithape, Manasmita Maharana, and A. M. Prusty. "Quality protein maize (QPM): Genetic basis and breeding perspective." Tropical Plant Research 4, no. 1 (2017): 145–52. http://dx.doi.org/10.22271/tpr.2017.v4.i1.021.

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Kumar, Ramesh, RB Dubey, KD Ameta, and Rajani Verma. "Genetic diversity in quality protein maize QPM inbreed lines." Bangladesh Journal of Botany 49, no. 1 (2020): 113–16. http://dx.doi.org/10.3329/bjb.v49i1.49103.

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The experimental material consisting of 18 lines and four standard checks were raised in RBD in three replications. Significant differences between the test entries were observed for all the traits. Twenty-two genotypes were grouped into VII clusters on the basis of observed distance among genotypes within a cluster as compared to genotypes in another cluster. Cluster III contains maximum number (seven) of genotypes. Cluster I had highest grain yield per plant, 100-grain weight, harvest index and tryptophan content while cluster VII had lowest anthesis silking interval and highest oil and lysi

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Aguado-Santacruz, Gerardo Armando, Edmundo García-Moya, José Luis Aguilar-Acuña, et al. "In vitro plant regeneration from quality protein maize (QPM)." In Vitro Cellular & Developmental Biology - Plant 43, no. 3 (2007): 215–24. http://dx.doi.org/10.1007/s11627-007-9042-9.

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González-Núñez, David Guillermo, Jesús Christian Grimaldi-Olivas, Karen Virginia Pineda-Hidalgo, et al. "Activity of starch biosynthetic enzymes and their association with endosperm modification in quality protein maize." Biotecnia 27 (February 28, 2025): e2421. https://doi.org/10.18633/biotecnia.v27.2421.

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The formation of vitreous endosperm in quality protein maize (QPM) is associated with changes in the composition and structure of starch granules, but little is known about the role of alterations in the structure and activity of the main starch biosynthetic enzymes. Developing endosperms from K0326Y-QPM, W64Ao2, and derived recombinant inbred lines were used to analyze the activity of ADP-glucose pyrophosphorylase (AGPase), granule-bound starch synthase (GBSS), starch-branching enzyme (SBE) and pullulanase (PULL). GBSS activity correlated positively with kernel vitreousness and the opposite w

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BELLO, Bashir Omolaran, Sunday Ayodele IGE, and Micheal Segun AFOLABI. "Genic resistance mechanisms of Turcicum leaf blight in early provitamin A quality protein maize." Peruvian Journal of Agronomy 8, no. 2 (2024): 145–57. https://doi.org/10.21704/pja.v8i2.2172.

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Provitamin A quality protein maize (PVA-QPM), as a cost-effective staple maize with improved nutritional quality, has the potential to address malnutrition in rural communities in sub-Saharan Africa. The objective was to identify early maturing Turcicum leaf blight (TLB)-resistant PVA-QPM hybrids and lines with promising grain quality and yield. There are significant yield discrepancies among the selected PVA-QPM hybrids, with five hybrids - TZEIORQ 11 × TZEIORQ 20, TZEIORQ 11 × TZEIORQ 24, TZEIORQ 20 × TZEIORQ 24, TZEIORQ 22× TZEIORQ 42 and TZEIORQ 24 × TZEIORQ 42 - standing out with an avera

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Denic, Miloje, Dragana Ignjatovic-Micic, Goran Stankovic, et al. "Role of genetic resources from different geographic and climatic regions in simultaneous breeding for high quality protein maize (HQPM) and stress tolerance." Genetika 44, no. 1 (2012): 13–23. http://dx.doi.org/10.2298/gensr1201013d.

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Due to the low biological value of proteins of common maize, it was reinitiated breeding for high protein quality maize (HQPM) using three genetic systems, namely: opaque-2 gene, endosperm modifier genes and enhancer genes, which are increasing lysine and tryptophan content in opaque-2 background In order to alleviate effect of abiotic and biotic stress factors, the genotypes with tolerance to those factors were included. Genetic resources originating from North, Central and South America, then West, Central and Southern Africa and gene bank of Maize Research Institute ?Zemun Polje? were used.

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Bamaiyi, Joseph, and Modupe Oniemayin. "Management of stem borers on some quality protein maize varieties." Journal of Agricultural Sciences, Belgrade 56, no. 3 (2011): 197–205. http://dx.doi.org/10.2298/jas1103197b.

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Four Quality Protein Maize (QPM) varieties: Dent, Sakatifu, Flint, Sammaz 14 and TZEE (Local Check) were evaluated for their response to stem borers. Furadan 3G was applied at the rate of 20 kg/ha at planting for the control of the stem borers. The stem borers damage was assessed by determining the number of leaves with ?windows? and plants with ?deadhearts?. The number of exit holes and tunnels on the stem were also determined and the tunnel length measured. Varieties Dent and Sakatifu had more windows, deadhearts, exit holes, tunnels and longer tunnel lengths than varieties Flint and Sammaz

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Baba, D., Damisa, M. A., Muhammad, A. B., and Yakubu, Y. L. "IMPACT OF ADOPTION OF QUALITY PROTEIN MAIZE ON POVERTY STATUS OF RURAL FARMING HOUSEHOLDS IN NORTHWEST, NIGERIA." Journal of Agripreneurship and Sustainable Development 3, no. 4 (2020): 135–56. http://dx.doi.org/10.59331/jasd.v3i4.168.

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The study assessed impact of adoption of quality protein maize (QPM) on rural poverty status of households in Northwest, Nigeria. The study collected data from 652 households using descriptive statistics; t-test, poverty decomposition, propensity score matching, average treatment effect, and potential outcome mean to analyze the data. The study found that about 29% - 31% (N351, 894 - N401, 658) of household expenditure goes to the purchase of food. It was equally established that 32% - 37% (N111, 878 - N141, 783) of household’s non-food expenditure was on cloth, transport, school fees and scho

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Belwal, Himani, and Neetu Dobhal. "Assessment of physical characteristics of quality protein maize (QPM) and common maize." International Journal of Research in Agronomy 7, no. 12 (2024): 862–65. https://doi.org/10.33545/2618060x.2024.v7.i12k.2279.

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Bello, Omolaran, Odunayo Olawuyi, Sunday Ige, et al. "Agro-nutritional variations of quality protein maize (Zea mays L.) in Nigeria." Journal of Agricultural Sciences, Belgrade 59, no. 2 (2014): 101–16. http://dx.doi.org/10.2298/jas1402101b.

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Quality protein maize (QPM) combining the enhanced levels of lysine and tryptophan with high grain yield and desirable agronomic traits could reduce food insecurity and malnutrition in West and Central Africa. Twenty-two varieties of QPM and two local checks were evaluated for agronomic characteristics and nutritional qualities in the southern Guinea savanna of Nigeria for two years (2009 and 2010). Though crude protein levels are good indicators of quality, amino acid composition analyses, especially lysine and tryptophan that would provide a final proof are in progress. The genotypes compris

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Marques, Georgiana Eurides Carvalho, Alana Das Chagas Ferreira Aguiar, Vinicius Ribamar Alencar Macedo, Ester De Paiva Alves, and Emanoel Gomes Moura. "Nitrogen Use and Protein Yield of Two Maize Cultivars in Cohesive Tropical Soil." Journal of Agricultural Science 9, no. 3 (2017): 193. http://dx.doi.org/10.5539/jas.v9n3p193.

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One major challenge to developing sustainable family farms in tropical regions is increasing nitrogen use efficiency. The aim of this study was to evaluate the combined effects of leguminous residues of low-and high-quality on nitrogen uptake, as well as on content of protein of a Quality Protein Maize (QPM) and of a hybrid maize in a tropical sandy loam soil. The experimental design consisted of randomized blocks with four replicates in a 6 × 2 factorial and six treatments: Gliricidia + Clitoria (GC); Gliricidia + Acacia (GA); Leucaena + Gliricidia (LG); Leucaena + Clitoria (LC); Leucaena + A

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Akhtar, Shaik Faheem, M. Altaf Wani, Tadar Jamja, et al. "Combining ability of quality protein maize (Zea mays L.) inbred lines for agronomic, yield and quality traits in temperate hilly regions of Kashmir, India." Journal of Applied and Natural Science 16, no. 3 (2024): 1383–92. http://dx.doi.org/10.31018/jans.v16i3.5479.

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The combining ability provides insightful information about the genetic mechanisms that govern the inheritance of traits and enables the identification of potential inbred lines ; and promising hybrid combinations for crop improvement. However, most studies on quality protein maize (QPM) have focused on nutritional aspects, and very few are focused on their combining ability. In addition, studies on the adaptation, hybrid performance and stability of QPM in temperate areas remain scarce.Therefore, the present study sought to examine the combining ability of eight QPM inbred lines (QPM13, QPM14

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Chaurasia, Niranjani. "A Review on Quality Protein Maize (QPM) an Important Agroproduct for Food and Nutrition." International Journal of Science and Research (IJSR) 11, no. 3 (2022): 219–20. http://dx.doi.org/10.21275/sr22304104557.

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