光(温)敏核不育水稻育性转换与气象条件的关系

RELATIONSHIPS BETWEEN THE FERTILITY CHANGES OF PHOTO-THERMO-SENSITIVE GENIC MALE STERILE RICE AND METEOROLOGICAL CONDITIONS

利用１９８９～１９９５年２７个光（温）敏核不育水稻不育系在湖北省仙桃市沙湖和浠水县自然条件下的分期播种试验资料，以及同期气候和实际光照时间观测资料，模拟了自然光长与天气条件，太阳赤纬的数字模型，在此基础上，分析了光（温）敏核不育水稻不育系的不育度与光、温因子的关系，研究了光（温）敏核不育水稻育性转换的光、温互作特性，提出了光温互作方程Ｌ＝１８．８９９７－０．１８０５Ｔ和光温互作系数，鉴定了几个核不育系的临界光。

According to the date of stage by stage seeding experiment on 27 species of photo-and thermo-sensitve genic male-sterile rice (PTGMR) and observation of climate and light duration under natural surroundings in Xiantao and Xishui county from 1989 to 1995, We conclude: First, the numeral model of light duration in a day with weather condition and the sun declination. Second, the relationships between sterility of PTGMR and photoperied or temperature, and the light duration and temperature interacting feature of fewtility changes of PTGMR. Finally, an interacting equation ( L=18.8997-0.1805 T ) and coefficient of photoperied ( L ) and temperature ( T ) for the first time, and a few critical photoperied and temperature indexes of PTGMR.