Abstract

Genetic analysis of certain physical quality traits of grain in four selected rice crosses indicated that milling recovery in Chandan/Sambamahsuri, head rice recovery in IR-64/Rasi and length/breadth ratio in all the crosses studied were under the control of additive gene action indicating the possibility of true breeding progenies for these parameters. However, the inheritance of traits like kernel length and breadth was influenced by both additive and non -additive type gene actions. Importance of all types of epistatic interactions were found to be governing the inheritance of grain yield. Postponement of selection of desirable segregants, to advanced generations could be suggested to exploit such complex genetic makeup.

Keywords: Milling recovery, Head rice recovery, Length/breadth ratio, epistatic gene effects.