Abstract: | A doubled haploid (DH) population derived from anther culture of F-1's between an Indica var. Zhai|Ye|Qing 8 and a Japonica var. Jing|Xi17 as well as two backcross populations derived from this DH population were used to investigate inheritance of the embryo sac abortion at early megagametogenesis occurring in Indica/Japonica rice crosses. Two major loci, dominant and complementary %esa|1% and %esa|2%, located on chromosomes 6 and 12 respectively, were detected. Genetic analysis indicated that embryo sac fertility is mainly regulated by the gametophytic genotype at these two loci. |