温度对萍乡显性核不育水稻育性转换的影响

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

利用人工控温条件和自然光温条件,研究了萍乡显性核不育水稻育性转换的特性。结果表明：在各温度因子中,光期温度在育性转换中的作用最大,其次为日均温,在一定的范围内,花粉可育率随光期温度的升高而增加；自然条件下,该水稻具有两个明显的育性转换期,即7月25日前抽穗为不育期,7月29日—9月2日抽穗为可育期,9月5日后抽穗进入稳定的不育期。

This paper reports the study of fertility alteration character of Pingxiang Dominant Genic Male Sterile Rice under nature 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 of 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 Seotember 5th it was sterile again.