Variability and correlation studies in cowpea (Vigna unguiculata)

Variability and correlation studies in cowpea (Vigna unguiculata)

2013

E07777

Genotypic coefficient of variation, heritability and genetic advance were assessed in 30 genotypes of cowpea. (Vigna unguiculata (L.) Walp). Genotype differed significantly for all characters studied. Almost all characters showed high heritability values. High heritability coupled with high genetic advance was observed for plant height, number of pods per plant and number of branches per plant and high GCV observed for leaf area index followed by days to 50% flowering indicating thereby the preponderance of additive gene effects for this characters. Interrelationships between seed yield per plot, number of pods per plant, and their component traits were studied. Days to maturity had highly significant positive correlation with days to 50% flowering both genotypically and phenotypically. Protein content is significant but negatively associated with days to maturity. Number of clusters per plant showed\n strong positive significant correlation with protein content .Pod length exhibited significant positive correlation with protein content. Number of seeds per pod exhibited positive significant correlation with protein content and strongly correlated with pod length Seed yield per plot exhibited strong positive significant correlation with clusters per plant, number of pods per plant It also shows moderately positive significant correlation with protein content. Components of seed yield viz. number of pods per cluster and number of clusters per plant appears to provide reliable criteria for effective selection in cowpea.

4(1):44-49, INTERNATIONAL JOURNAL FOR ENVIRONMENTAL REHABILITATION & CONSERVATION

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