Combining ability and heterosis for yield and grain quality in two line rice (Oryza sativa L.) hybrids.

摘要

Thirty two rice (Oryza sativa L.) hybrids involving four TGMS (Thermo Sensitive Gene Male Sterile) lines and eight testers were evaluated for combining ability and heterosis. Among the parents, the TGMS lines viz., GD 98049 and GD 98014, and the testers CB 97033 and IR 72 were the best based on the mean and gca effects. Considering the mean performance, sca effects and standard heterosis, six hybrids viz., GD 98013/CB 97033, GD 98013/CO 47, GD 98014/ADT 45, GD 98014/PMK 2, GD 98049/ADT 39 and GD 98049/CB 97033 were superior for grain yield and kernel quality traits and recommended for further evaluation..