Identification of RAPD markers linked to fertility restoring gene of rice cytoplasmic male sterile line

摘要

Rice cytoplasmic male sterility (CMS) is a complicated phenomenon yet to be elucidated. Numerous studies have focused on the difference in mitochondrial genomes between CMS line and its maintainer counterpart without breakthrough. Induction of fertility restoration of CMS line may open a new way in CMS study. We have obtained a fertile revertant induced from CMS line II-32A with ~(60)CO γ-rays treatment. The revertant is able to restore not only the fertility of its parental CMS line, but also thatof other indica CMS lines such as Zhenshan 97 A, Xieqingzao A. The restoration is conditioned by one nuclear gene, which is different from other restorer genes so far in practical use, such as those of IR24 and Minghui 63 (Shen et al. 1996).