Comparative Analysis of Effectiveness of Wide Compatibility (WC) Trait Between Improved Maintainer Line Having WC and eui Genes and Maintainer Line with eui and Without WC Genes in Rice (Oryza sativa L.)

摘要

The present study was carried out to know the effectiveness of wide compatibility trait. The compatibility as measured by percentage pollen and spike-let fertility in revealed it to vary with the IR 58025eWCB having WC and eui genes and IR58025eB witheui gene. In crossing of IR58025eWCB with in-dica, japonica and tropical japonica testers, group mean spikelet fertility (83.62%), (77.03%) and (68.84%) respectively, the comparison with crossing of recurrent parent JR58025eB with indica, Japonica and tropical japonica testers, group mean spikelet fertil-ity (82.19%), (43.85%) and (59.54%) respectively. The estimated increase in group mean percentage overcome with indica, japonica and tropical japonica testers 7.18% 17.00% and 40.00% for pollen fertility and 1.74%, 75.66% and 15.61% for spikelet fertility respectively. The effectiveness of wide compatibility trait in improved parental line helps us to further exploitation of it in hybrid rice breeding program.