Studies on Gene Action and Combining Ability for Morpho- Physiological Traits in Rice (Oryza Sativa L.) Under Water Stress Condition

摘要

Combining ability analysis was carried out involving 24 crosses tor grain yield and, its components and some of the physiological characters in line x tester design under water stress condition. The magnitudes of specific combining ability variances were higher than the general combining ability variances for all the characters except for days to 50% flowering, grain yield per plant and chlorophyll stability index which indicated predominance ofnon additive gene action in the inheritance of these traits. Three crosses viz., JGL3855/Rajendra, MTU 1001/JGL 17004 and BPT 5204/Annada could be isolated as they possessed desirable SC A, heterosis and per se performance for yield and physiological traits.