Optimization of Genetic divergence for the occurrence of Heterosis in Blackgram (Vigna Mungo L.)
J. Sankar and P. Satheesh Kumar
Department of Genetics and Plant Breeding, Faculty of Agriculture, Annamalai University, Annamalai Nagar – 608002 (India) *Corresponding Author E-mail: sankarj85@gmail.com
ABSTRACT
A study was conducted with aim of relating genetic divergence among the parents with frequency and magnitude of heterosis in the F1 generation. The divergence among the parents were classified into four classes viz., DC1, DC2, DC3 and DC4. Heterosis was computed as per cent improvement over the better parent for ten important components of the yield. Genetic divergence was measured by D2 statistic. If mean (m), standard deviation (s) of divergence values among them parents. It was postulated that two parents whose genetic divergence D2 values lies between M-S and M+S, (DC2 or DC3) were heterotic than the parental divergence values exceeds the limits (M-S, M+S)