Character Association and Path Analysis in Cowpea [Vigna unguiculata (L.) Walp] Germplasm Line

Sharma, Mahesh; Sharma, P.P.; Upadhyay, B.; Bairwa, H.L.; Meghawal, D.R.

doi:10.20546/ijcmas.2017.606.092

Cited by 8 publications

(8 citation statements)

References 11 publications

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“…Furthermore, high heritability coupled with genetic advance were recorded for days to flowering, grain filling period, plant height, pod length, seed yield and thousand seed weight, indicates additive gene action control the expression inheritance of these traits in cowpea (Ubi et al, 2001). A similar result was reported by Thorat and Gadewar (2013), Sharma et al, (2017) and Das et al (2018) for seed yield and Khan et al (2015) *, ** = significant at P≤ 0.05 and P≤ 0.01, respectively. Where: DF = days to flowering, GFP = grain filling period, DM = days to maturity, PH = plant height, PL = pod length, NSP = number of seeds per pod, SY = seed yield, TSW = thousand seed weight; MSg = mean square of genotypes, MSe = mean square of error (environmental variance, δ2e), σ2g = genotypic variance, σ2p = phenotypic variance, PCV = phenotypic coefficient of variance (%), GCV = genotypic coefficient of variance (%), H2 = broad sense heritability (%), GA = Genetic advance and GAM = genetic advance as percent of mean (%).…”

Section: Expected Genetic Advance For Selectionsupporting

confidence: 88%

Genetic Variability, Heritability, Genetic advance and Divergence in Ethiopian Cowpea [Vigna unguiculata (L) Walp] Landraces

Belay

Fischa

2020

Preprint

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Information on genetic variability in cowpea germplasm is important for crop improvement and for efficient utilization of the existing genetic resources. Hence, the objectives of the present investigation were to estimate genetic variability, heritability, genetic advance and to identify divergent parents from distantly related clusters among Ethiopian cowpea accessions. The field experiment was carried out using 42 accessions at Abergelle Agricultural Research Center on station during the 2019 cropping season. Data were collected for 8 agronomic traits and analysis of variance revealed significant differences (p<0.01) among the accessions for the traits studied. Seed yield had higher genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) coupled with the highest genetic advance as percent of mean (100%). All the traits had moderate (68.01) to very high (99.98%) broad sense heritability. Further, high heritability coupled with high genetic advance as percent of mean was attained for days to flowering, grain filling period, plant height, pod length, seed yield and thousand seed weight reflecting the presence of additive gene action for the expression of these traits and improvement of these traits could be done through selection. The cluster analysis based on agronomic traits revealed four distinct groups at 90% similarity level. The highest inter cluster D2 was recorded between cluster III and cluster IV (D2=133.69 units). The range of inter cluster distance was 15.25 to 133.69 units, respectively. In conclusion, the high genetic distance revealed among clusters has to be exploited via crossing and selection of the most divergent parents for future cowpea improvement program.

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Section: Expected Genetic Advance For Selectionsupporting

confidence: 88%

Genetic Variability, Heritability, Genetic advance and Divergence in Ethiopian Cowpea [Vigna unguiculata (L) Walp] Landraces

Belay

Fischa

2020

Preprint

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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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“…Moderate GCV was recorded for seeds pod -1 and low GCV was observed for pod length. High PCV and GCV for plant height and clusters plant -1 was observed by Vinay et al (2022), for primary branches plant -1 by Sharma et al (2017), for pods cluster -1 by Verma et al (2019), for pods plant -1 by Ajayi et al (2014) for seed yield plant -1 and 100 seed weight by Singh et al (2022).…”

Section: Resultsmentioning

confidence: 91%

Genetic Variability Studies for Yield and Yield-Attributing Traits in Cowpea Germplasm Accessions (Vigna Unguiculata L. Walp.)

Deeksha,

Krishna

2024

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A set of 153 cowpea germplasm accessions were evaluated under the augmented design at Zonal Agricultural Research Station, Gandhi Krishi Vignana Kendra (GKVK), Bengaluru during Kharif 2022 to study genetic variability for yield-related traits. High phenotypic coefficient of variation (PCV) for pods plant -1 , plant height, primary branches plant -1 , clusters plant -1 , pods cluster -1 , seed yield plant -1 and 100 seed weight, high genotypic coefficient of variation (GCV) for pods plant -1 , plant height, primary branches plant -1 , clusters plant -1 , pods cluster -1 , seed yield plant -1 and 100 seed weight were observed. PCV was relatively higher than GCV and the difference between the phenotypic and genotypic coefficient of variation was narrow for all the traits under consideration indicating higher genetic variability. The plant height, primary branches plant -1 , pods cluster -1 , pods plant -1 , seeds pod -1 , 100 seed weight and seed yield plant -1 had high heritability implying that these traits are highly inherited and environmental factors have little influence on trait expression. Selection practiced based on these characters is inherited efficiently by the next generation. k-means clustering analysis conducted for genetic divergence assessment categorized the accessions into eleven clusterswith the number of accessions per cluster varying from 4 to 29 indicating substantial genetic diversity among the accessions.

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Character Association and Path Analysis in Cowpea [Vigna unguiculata (L.) Walp] Germplasm Line

Cited by 8 publications

References 11 publications

Genetic Variability, Heritability, Genetic advance and Divergence in Ethiopian Cowpea [Vigna unguiculata (L) Walp] Landraces

Genetic Variability, Heritability, Genetic advance and Divergence in Ethiopian Cowpea [Vigna unguiculata (L) Walp] Landraces

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

Genetic Variability Studies for Yield and Yield-Attributing Traits in Cowpea Germplasm Accessions (Vigna Unguiculata L. Walp.)

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