Variability, Heritability and Genetic Advance Studies in F2 Generation of Cowpea (Vigna unguiculata sub sp. unguiculata)

Abstract

An experiment was conducted with 23 F 2 generation genotypes in randomized block design with three replication rabi season of 2017-18 at Research and Education farm, Department of Agriculture Botany, College of Agriculture, Dapoli. The estimates of phenotypic, genotypic and environmental variances revealed that, in general phenotypic variances for all the characters studied were higher than genotypic variances. Phenotypic coefficient of variation was greater than the genotypic coefficient of variation for all the characters for present study. The high phenotypic and genotypic coefficient of variation was observed for seed yield per plant, number of pods per plant, number of clusters per plant and number of primary branches per plant, while lowest GCV and PCV was observed for days to first flowering and days to maturity. High heritability with high genetic advance as percentage of mean was observed for seed yield per plant, number of pods per plant, plant height, number of primary branches per plant, hundred seed weight and harvest index. It indicates additive gene action and made it suitable for direct selection. K e y w o r d sCowpea [Vigna unguiculata (L.

Variability and interrelation analysis in cowpea [Vigna unguiculata (L.) Walp.] Genotypes

“…Days to 50 per cent flowering along with days to maturity had low values of GCV and PCV suggesting narrow range of variation for these characters. Findings were in similar trend with Ramesh et al (2014) [15] for days to 50 per cent flowering and Sable et al (2018) [16] for days to maturity. The characters like plant height (99.80%), biological yield per plant (99.10%), harvest index (97.60%), number of pods per plant (97.20%), seed yield per plant (96.50%), 100-seed weight (92.80%) and pod length (89.60%) depicted high estimates of heritability.…”

“…These characters can be easily transferred from parent to offsprings. These findings were in conformity with the resultsof Suganthi and Murugan (2008) [22] for seed yield per plant, pod length and 100-seed weight;Sarath and Reshma (2017) [17] for plant height, seed yield per plant and pod length; Surpura et al (2017) [23] for number of pods per plant, biological yield per plant, seed yield per plant, 100-seed weight and plant height; Sable et al (2018) [16] for plant height, seed yield per plant, 100-seed weight, number of pods per plant and harvest index and Gupta et al (2019) [6] for plant height and number of pods per plant. Table 1 clearly showed that the number of pods per plant (101.66%) followed by harvest index (86.59%), seed yield per plant (81.74%) and plant height (70.58%) had high result values of genetic advance as per cent of mean.…”

“…Table 1 clearly showed that the number of pods per plant (101.66%) followed by harvest index (86.59%), seed yield per plant (81.74%) and plant height (70.58%) had high result values of genetic advance as per cent of mean. Similar outcomes were obtained by Kumar et al (2018) [10] for number of pods per plant; Khan et al (2015) [8] and Surpura et al (2017) [23] for number of pods per plant, plant height and seed yield per plant and Sable et al (2018) [16] for seed yield per plant, number of pods per plant, harvest index and plant height. Whereas, moderate estimate of genetic advance as per cent of mean were reported for biological yield per plant (51.03%), 100-seed weight (42.35%), number of branches per plant (36.81%), number of seeds per pod (31.41%) and pod length (30.12%).…”

Variability in Yield and Yield Components of Selected Pro-vitamin A Maize (Zea mays L.) Varieties in a Humid Environment of Port Harcourt, Nigeria

“…High heritability estimates for characters practically often denote the ease and efficiency of selection in any breeding program as it suggests that the characters are likely to be easily passed on to the next generation. Although, it is more reliable to consider heritability values along with those of genetic advance [30], as high heritability coupled with genetic advance reveals the presence of lesser environmental influence and prevalence of additive gene action in their expression [48].…”

Genotypic Variability of Exotic Cowpea Genotypes for Agro-Morphological Traits in Mid-Western Region of Nepal

“…High genetic advance was recorded for seed yield per plant by Khan et al (2015). Sabale et al (2018) reported lower PCV recorded for maturity day and flowering day. Traits namely seed per pods, pod per plant, plant height, hundred grain weight and grain yield showed moderate to high GCV and PCV value along with high heritability and GAM.…”