Genetic variability and interrelationship studies in cowpea [Vigna unguiculata (L.) Walp.]

摘要

Studies on variability, correlation and path coefficients were made on single plant yield and its components in 26 cowpea genotypes. High heritability and high genetic advance were obtained for all the nine traits. Single plant yield had positive andsignificant association with clusters/plant, pods/plant, pod length, seeds/pod and 100-seed weight as indices for improving yield in cowpea. Path analysis revealed that pods/plant, seeds/pod and 100-seed weight had high direct effect towards single plantyield. Clusters/plant showed high indirect effect through pods/ plant on grain yield. The study revealed that genetic improvement of grain yield was possible by selecting characters having positive correlation and positive direct effect.