Genetic analysis of quantitative traits in cowpea [vigna unguiculata (L.) walp.] using six parameter genetic model

Singh, A. K.; Singh, Yashvir; Sharma, Anita; Visen, Amit; Singh, Manju; Singh, Surendra

doi:10.18805/lr.v0iof.10285

Cited by 8 publications

(10 citation statements)

References 4 publications

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“…They found that all characters are under the influence of duplicate epistasis. This duplicate type of epistasis generally hinders improvement via selection because it decreases the variation in F 2 and subsequent generations (Mistry et al, 2016;Singh et al 2016a). Thus selection of these characters should be mild in the early generations and intense in later generations after genes controlling the desirable characters have been fixed and the dominance effect would have diminished.…”

Section: Resultsmentioning

confidence: 99%

Genetic studies in mungbean [Vigna radiata (L.) Wilczek]

Khajudparn

Poolsawat

Tantasawat

2018

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To study the genetics of seven agronomic and physiological characters (total dry matter (TDM), number of pods per plant, seed weight per plant, 100-seed weight, number of seeds per pod, pod length and root length density) which were correlated with yield, eight crosses of mungbean were made, and the agronomic and physiological characters were evaluated in the six basic generations (P1, P2, F1, F2, BC1 and BC2) of each cross. It was found that most characters including TDM, number of pods per plant, seed weight per plant and root length density showed additive, dominance and epistatic gene effects, except for 100-seed weight, number of seeds per pod and pod length. One hundred-seed weight and number of seeds per pod possessed only additive gene effects, while pod length was controlled by both additive and dominance gene effects. The duplicate epistasis revealed the presence of a large number of non-additive gene actions controlling TDM, number of pods per plant, seed weight per plant and root length density that may hinder the improvement of these characters, and confirmed that selection of these characters in later generations would be more feasible.

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Section: Resultsmentioning

confidence: 99%

Genetic studies in mungbean [Vigna radiata (L.) Wilczek]

Khajudparn

Poolsawat

Tantasawat

2018

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“…Inadequacy of models with digenic epistatic effects for some of the traits suggests the involvement of higher order gene interactions for those traits. The involvement of epistasis for yield components in cowpea has been reported [13,14,33]. Important contribution of epistasis to traits of economic importance implies that a significant component of performance for those traits derives from gene interactions.…”

Section: Discussionmentioning

confidence: 99%

“…In breeding for increased yield, plant breeders require a good knowledge of the nature and magnitude of gene effects that moderate the characters that contribute to it. Inheritance of yield and its components have been reported in cowpea [10][11][12][13][14][15] and yard-long bean [16,17]. Yield-related traits are often correlated and selection for one may lead to negative or positive response in the other traits [18].…”

Section: Introductionmentioning

confidence: 99%

Inheritance of Pod Length and Other Yield Components in Two Cowpea and Yard-Long Bean Crosses

et al. 2021

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This study determined the gene effects involved in the inheritance of pod length and other yield-related traits and relationships among traits in crosses between two cowpea lines (TVu 2280 and TVu 2027) and a yard-long bean (TVu 6642) line with long pods. Plants of six generations (P1, P2, F1, F2, BC1P1, and BC1P2) derived from TVu 2280 × TVu 6642 and TVu 2027 × TVu 6642 were evaluated under field conditions. Data collected on 14 yield components of each cross were used for generation mean analysis. Gene effects and their magnitudes varied with the crosses; digenic epistatic gene effects were detected for 10 traits in TVu 2280 × TVu 6642 and 11 traits in TVu 2280 × TVu 6642. Only additive gene effect was significant for pod length in TVu 2280 × TVu 6642 while additive, dominant, and two of the three digenic epistatic gene effects were significant in TVu 2027 × TVu 6642. Models that incorporated only significant additive, dominant, and digenic epistasis were adequate for all 14 traits in TVu 2280 × TVu 6642 and eight of the 12 traits in TVu 2027 × TVu 6642 for which model-fitting was possible. Across segregating generation of the two crosses, pod length (PodLNT) was significantly (p < 0.001) correlated with three major yield components viz. pod weight (0.84, 0.77), number of seeds per pod (0.41, 0.30) and seed weight per pod (0.61, 0.29). Significant correlation of PodLNT with seed yield per plant was moderate and significant (p < 0.01–0.001) in the BC1P1 of the two crosses (0.31 and 0.41). An improvement in cowpea seed yield is feasible through selection for long pods in segregating generations involving crosses with yard-long bean.

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“…The efficacy of selection depends on the existence and magnitude of genetic variability for yield and yield traits in the breeding material (Adewale et al, 2010;Andrade et al, 2010;Raturi et al, 2015). Considering that the genetic control of quantitative traits as yield and its components is due to additive, dominant and epistatic genetic effects (Singh et al, 2016), heritability in conjunction with genetic advance alone is much better than the inheritance itself in the prediction of the best genotypes (Johnson et al, 1955, Ali et al, 2016. According to Johnson et al (1955), genetic advance the percentage of the mean was high (≥20%), moderate (10-20%) and low (0-10%); In this sense, pods per plant, peduncle length, 100 seed weight and days to harvest, accounted for the highest genetic gain GAM (%), with values of 36.06; 47.65; 84.11 and 87.07%, respectively (Table 2).…”

Section: Genetic Parametersmentioning

confidence: 99%

Estimation of genetic parameters in white seed cowpea (Vigna unguiculata (L) Walp)

Araméndiz-Tatis¹,

Ayala²,

Camacho³

et al. 2018

Aust J Crop Sci

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The objective of this research was to estimate genetic parameters of characteristics associated with yield in 42 genotypes of white colored cowpea. The experimental design was Federer's augmented blocks, with five replications. Ten quantitative characters were recorded. Analysis of variance detected significant and highly significant differences between genotypes, in nine of the ten characters. The coefficients of phenotypic variation were greater than those of genotypic variation, due to the influence of the environment. High broad-sense heritability was revealed for peduncle length, 97.05%, number of pods per plant, 95.48% and weight of 100 seeds, 98.51%; the expected genetic progress varied between 0.07 (seed width) and 17.04 (seed yield per plant), while the genetic advance as a percentage of the average ranged from 2.80 (days to harvest) to 87.07 (seed yield per plant). The first four principal components explained 80.66% of the total variability; the length and width of the seed, and the weight of 100 seeds contributed to PC1; and the number of days, both for maturity of the first pod and for harvest, and the length of the pod, contributed to a greater degree to PC2. It was concluded that the number of pods per plant, the weight of 100 seeds and the yield of seed per plant are selection criter ia for future breeding programs

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Genetic analysis of quantitative traits in cowpea [vigna unguiculata (L.) walp.] using six parameter genetic model

Cited by 8 publications

References 4 publications

Genetic studies in mungbean [Vigna radiata (L.) Wilczek]

Genetic studies in mungbean [Vigna radiata (L.) Wilczek]

Inheritance of Pod Length and Other Yield Components in Two Cowpea and Yard-Long Bean Crosses

Estimation of genetic parameters in white seed cowpea (Vigna unguiculata (L) Walp)

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