Heterosis, inbreeding depression and heritability for yield and yield components in cowpea

Pathak, A. R.; Naik, M. R.; Joshi, H. K.

doi:10.5958/0975-928x.2017.00010.2

Cited by 6 publications

(9 citation statements)

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“…Lower estimates were found for the environmental coefficients of variation, showing high experimental accuracy. Coefficient of variation ratios higher than one and heritability values higher than 63% show that the phenotype is mostly attributable to genetic causes, indicating accuracy and efficiency in selection of early maturity individuals (Vencovsky et al 2012, Pathak et al 2017).…”

Section: Resultsmentioning

confidence: 99%

“…These heritable phenotypic proportions are within the limits found in the literature for segregating populations of cowpea crosses. Pathak et al (2017) obtained broad sense heritability ranging from 37.46% to 86.43% for number of days to flowering and from 34.52% to 95.83% for days to maturity. In the narrow sense, they found heritability with variations from 4.26% to 82.34% for days to flowering and 4.79% to 93.73% for days to maturity.…”

Section: Table 1 Mean and Variance Estimates For Number Of Days To Flowering (Ndf) And Number Of Days To Maturity (Ndm) In Six Populationmentioning

confidence: 97%

“…A wide range of heritability has been reported in genetic studies conducted with segregating cowpea populations. For number of days to flowering, variations of 37.46% to 89.7% can be found for broad sense heritability, while narrow sense heritability has ranged from 4.26% to 90.87% (Ishiyaku et al 2005, Adeyanju and Ishiyaku 2007, Pathak et al 2017, Owusu et al 2018a. For number of days to maturity, genetic studies have shown broad sense heritability from 34.52% to 95.83% and variations from 4.79% to 93.73% for narrow sense heritability (Ribeiro et al 2014, Pathak et al 2017, Owusu et al 2018a).…”

Section: Sp Santos Et Almentioning

confidence: 99%

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Genetic control of traits related to maturity in cowpea

Santos

Damasceno‐Silva

Aragão

et al. 2020

Crop Breed. Appl. Biotechnol.

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The aim of this study was to investigate genetic control of the traits number of days to flowering (NDF) and number of days to maturity (NDM) in a cowpea cross. Genetic parameters were estimated in segregating and nonsegregating generations of a cross between two contrasting cowpea genotypes (MNC05-828C-1-9-1 × MNC04-792F-146). No evidence for maternal effect was found for either trait. Broad and narrow sense heritability estimates were above 50%, allowing genetic gains from selection of plants in the F 2 generation. High significance of additive gene effects and low contribution of dominance and epistatic effects were detected for both traits. The estimated number of genes controlling the traits was around 4 for NDF and 5 for NDM. The results suggest that early-maturing cowpea self-fertilized cultivars can be developed through standard breeding approaches, meeting the demands of modern agricultural systems for more crop seasons per year and mechanized harvesting.

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Section: Resultsmentioning

confidence: 99%

Section: Table 1 Mean and Variance Estimates For Number Of Days To Flowering (Ndf) And Number Of Days To Maturity (Ndm) In Six Populationmentioning

confidence: 97%

Section: Sp Santos Et Almentioning

confidence: 99%

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Genetic control of traits related to maturity in cowpea

Santos

Damasceno‐Silva

Aragão

et al. 2020

Crop Breed. Appl. Biotechnol.

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“…High estimates of genetic advance (e.g. for HSW and SDS) and high heritability indicate that selection would result in foreseeable genetic improvement [ 36 , 37 ]. The large discrepancies values of PCV compared to GCV in this study, suggests that trait expression was also influenced by environment factors in addition to genetic effects, which was also confirmed by the significant location main effects in the ANOVA (Table 2 ).…”

Section: Discussionmentioning

confidence: 99%

Assessing the genetic diversity of cowpea [Vigna unguiculata (L.) Walp.] germplasm collections using phenotypic traits and SNP markers

et al. 2020

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Background Productivity of cowpea [Vigna unguiculata (L.) Walp] in sub-Sahara Africa is curtailed by a lack of farmer-preferred and improved cultivars and modern production technologies. The objectives of the study were to determine the extent of genetic diversity present among a collection of cowpea accessions from Zambia and Malawi using phenotypic traits and single nucleotide polymorphism (SNP) markers and, to select distinct and complementary parental lines for cultivar development. One hundred cowpea genotypes were evaluated for agronomic traits in two selected sites in Zambia, using a 10 × 10 alpha lattice design with two replications. Ninety-four of the test genotypes were profiled with 14,116 SNP markers. Results Number of pods plant− 1 (NPP), pod length (PDL), and number of seeds pod− 1 (NSP), were significantly (p < 0.05) affected by genotype × environment interaction effects. Genotypes such as CP411, CP421, CP645, CP732, Chimponongo, and MS1–8–1-4 exhibited higher grain yield of > 1200 kg/ha with excellent performance in yield components such as NSP, PDL, HSW and GYD. Grain yield had significant (p < 0.05) associations with NPP (r = 0.50), NSP (r = 0.46) and PDL (r = 0.42) useful for simultaneous selection for yield improvement in cowpea. The SNP markers revealed gene diversity and polymorphic information content of 0.22 and 0.17, respectively, showing that the tested cowpea accessions were genetically diverse. Test genotypes were classified into four genetic groups irrespective of source of collection allowing selection and subsequent crosses to develop breeding populations for cultivar development. Conclusions Genotypes Bubebe, CP411, CP421, CP645, Chimponogo and MS1–8–1-4 were identified to be the most genetically divergent and high yielding making them ideal parental lines for breeding. This study provided a baseline information and identified promising cowpea genetic resources for effective breeding and systematic conservation.

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“…Traits with moderate to high heritability accompanied by high genetic advance as a percent of mean (GAM) indicates additive genetic effects leading to effective respond to selection, while high heritability with low GAM suggests a nonadditive genetic action [52,53]. erefore, the heritability estimates and the high genetic advance indicate that selection would result in foreseeable genetic improvement in most of the traits [54], while 50% FLO and 50%MAT with low genetic advance estimates show the effects of equal contribution of additive and nonadditive gene action in the trait's expression [55].…”

Section: Heritability and Genetic Advancementioning

confidence: 99%

High-Density DArT Markers and Phenotypic Characterization of Cowpea Accessions (Vigna unguiculata (L.) Walp)

Adu

Amoah

Aboagye

et al. 2021

Advances in Agriculture

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Cowpea (Vigna unguiculata (L.) Walp) is an important component of most traditional cropping systems in the tropics. It provides leafy vegetables and/or grains and forages and acts as a cover crop. We characterized 16 cowpea accession collections in Ghana using agromorphological traits and high-density silicoDArT markers for breeding and efficient conservational purposes. Principal component analysis indicated pod, leaf, and seed characters such as pod length, seeds per pod, terminal leaves shape, number of leaves, hundred seed weight, and seed weight per plant as discriminatory traits in revealing the variation among the accessions. Trait association analysis revealed a significant correlation between the pod number, pod length, seeds per pod, number of leaves, and seed weight per plant that could allow the selection to improve the grain yield. Moderate to high broad-sense heritability and genetic advance observed for most of the traits indicate that the selection would result in foreseeable genetic improvement. The 9,706 silicoDArT markers used in the study were able to reveal genetic variation among the tested cowpea collections. Accessions GH5039 and GH6056 were established as duplicates based on the silicoDArT markers, which could enhance efficient germplasm utilization and conservation. Accessions GH3685, GH3674, and GH4541 were identified for high leaf and pod production and high seed yield per plant, which could be good candidates for dual purpose cowpea production, which is common in the subsistence farming system.

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Heterosis, inbreeding depression and heritability for yield and yield components in cowpea

Cited by 6 publications

References 0 publications

Genetic control of traits related to maturity in cowpea

Genetic control of traits related to maturity in cowpea

Assessing the genetic diversity of cowpea [Vigna unguiculata (L.) Walp.] germplasm collections using phenotypic traits and SNP markers

High-Density DArT Markers and Phenotypic Characterization of Cowpea Accessions (Vigna unguiculata (L.) Walp)

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