Variability Analysis in Inter Subspecies Crosses of Cowpea (Vigna unguiculata (L.) Walp. and Vigna unguiculata (L.) Walp. spp. sesquipedalis)

By : G. Selvakumar, R. Usha Kumari

Page No: 109-113

Abstract
The study was carried out to determine combining ability analysis among crosses derived from 11 selected cowpea genotypes. The crosses were made in L x T fashion. By using six lines and five testers, thirty hybrids were synthesized. A total of eleven genotypes were selected for crossing. Genotypes GC 3, Co 6, ACM 05-07, RC 101, Co(CP)7, and ACM 05-02 belonging to Vigna unguiculata were used as lines. Vellayani Local, Ettumanoor Local, Vyjayanthi, Vellayani jyothica belonging to Vigna unguiculata spp. sesquipedalis and VBN 2 belonging to Vigna unguiculata were used as testers. Except days to maturity and days to 50 per cent flowering all other traits are recorded high range value in both heritability and GA indicating that these traits were controlled by additive gene action. Additive gene action is fixable in segregating generation to get desirable high yielding genotype in cowpea.

Authors :
G. Selvakumar : PhD scholar, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India
R. Usha Kumari : Agricultural College and Research Institute, Tamil Nadu Agricultural University (TNAU), Madurai 625 104, Tamil Nadu, India.