Ecology, Environment and Conservation Paper

GENETIC ANALYSIS OF QUANTITATIVE CHARACTERS IN AEROBIC RICE

A.R. Patel1, V.P. Patel, V.N. Parmar and A.G. Kasture

Abstract

The gene effects for grain yield and its components including grain characters were studied using parental, F1, F2, BC1 and BC2 generations in four rice crosses under aerobic condition. Additive and dominance effects had significant role in most of the crosses for the expression of plant height, days to flowering, and productive tillers per plant, panicle length, grains per panicle, 100 grain weight, kernel length, length/breadth ratio, straw yield per plant and grain yield per plant. Similarly epistasis was noticed in the majority of characters for all crosses. Among interactions, additive x additive and dominance x dominance effects were almost equally important, while additive x dominance was less important than the other genetic effects for the inheritance of traits. Duplicate type of epistasis was observed in most of the traits studied. In general, both additive and non-additive gene action were important for the expression of almost all characters studied.