关键词: 水稻, 光敏不育系, 育性, AMMI模型

Abstract: We have developed an identification method for the PGMS （photo-sensitive genic male sterile） lines under the natural day length. A comparison of genetic sensibility of the eight rice genotypes to longday and temperature was performed with the AMMI（additive main effects and multiplicative interaction）model，in which the longday and temperature at sensitive stages of the fertility were divided into 6 and 11 gradients，respectively，the results showed that these eight lines grown under the natural condition in Hangzhou belong to PGMS type，with the following characteristics：10-20 d before heading was the sensitive stage for the fertility transformation，3.0-13.8 h for critical day-length was 13.0-13.8 h，25 ℃ and 21 ℃ for the critical high temperature and critical low temperature of the fertility，respectively.

Key words: rice, PGMS （photo-sensitive genic male sterile）, fertility, AMMI （additive main effects and multiplicative interaction）