Abstract
Harvest index and crop growth rate was studied in eight semidwarf mutants and two standard varieties at 4 different growth stages viz. seedling, tillering, flowering and maturity. Semidwarf mutants DM38, DM-16-5-1, DM-15-1 exhib-ited highest CGR at maturity stage. The results of the study with respect to harvest index showed a significant variation among all the semidwarf mutants. Mutant DM-24, DM-107-4 and DM-38. It was also noticed that harvest index is not related with biological and grain yield.
