Inheritance of yield and yield traits in rice

摘要

Magnitude of four components of variation, viz., D, H, F and E was estimated using six generations namely PI, PZ, FI, Fa, BCi, and BCj of a Pankaj x Manoharsali, cross of rice for yield and yield traits. Additive genetic variance (D) was high for daysto 50% flowering, panicle length, spikelets panicle~(-1) and panicle number. Dominance variance (H) was of high magnitude for plant height and yield plant~(-1). Positive sign of F component for panicle length and spikelets panicle~(-1) revealed that genes with positive effects were dominant for these two characters, whereas for other four characters genes with negative effects were dominant. The presence of additive and dominance variance for yield and yield traits indicated that biparental mating followed by selection or diallel selective mating system could improve these characters in rice.