Analysis of Natural Mutant of Photoperiod Sensitive Genetic Male Sterile Japonica 920S under Different Photoperiods in Rice

다국어 초록 (Multilingual Abstract)

Photoperiod sensitive genetic male sterile (PGMS) rice 920S was characterized as sterile when it was grown under longday condition but fertile when grown under short day condition. PGMS rice 920S, F1 and F2 plants were examined for their fer-tilities under diferent photoperiods. All 920S parent plants were fertile in short photoperiod condition at 10 hrs day length, partialfertile in intermediate photoperiod condition at 13 hrs day length and sterile in long photoperiod condition at 14 hrs day length.antsshowed wide range of fertility with partial segregation of complete fertile, partial fertile, and complete sterile plants when theywere exposed to intermediate day length condition of 13 hrs day length. Therefore, here we suggest that there is a critical pho-toperiod to affect a PGMS gene that causes an alteration in fertility.