P Satheeshkumar, S Elakkiya, K Saravanan, A Kamaraj, ST Ponsiva, S Thirugnanakumar
The estimates of additional biometrical genetic parameters indicated the importance of dominance in the expression of almost all the traits of interest, among the parents of the present study. Gene symmetric was observed for days to 50 per cent flowering, number of productive tillers per plant, panicle length and seed breadth. Predominance of the presence of dominant alleles was observed for plant height at maturity, number of filled seeds per panicle, seed length, seed L/B ratio, hundred seed weight and seed yield per plant. The ratio of dominance to recessive indicated the prevalence of dominant alleles among the parents except, for number of productive tillers per plant. Similarly, opulence of dominant genetic variation was observed for all the traits of interest, except, seed breadth. The magnitudes of dominance variances were higher than that of additive genetic variance for all the traits of interest except number of filled seeds per panicle. The study amply indicated that the parents utilized for the present inquiry possessed more of dominant alleles. Hence, they may be well utilized in heterosis breeding program.