Temperature of Influence on the Fertility Alteration of Pingxiang Dominant Genic Male Sterile Rice

This paper reports the study of fertility alteration character of Pingxiang Dominant Genic Male Sterile Rice under na- ture condition and in phytotron.The results showed that light temperature played the most role in fertility change followed by daily mean temperature among all kinds of temperature factors.The rate d pollen fertility increased as light temperature increased in a certain temperature range.Under nature condition,this material had two different fertility alteration stages:it was sterile heading before July 25th,heading between July 29th and September 2nd it was fertile,after September 5th it was sterile again.