【摘要】 本研究以农垦５８Ｓ、７００１Ｓ、３１１６Ｓ、Ｃ４７Ｓ、培矮６４Ｓ、Ｂ１４０１８Ｓ等外引不育系为供体，黑龙江省早粳材料为授体的转育后代中，所选出的不育株系，在哈尔滨地区（Ｎ４５°４６′）气候生态条件下，观察研究镜检套袋自交和自然结实率与气温的关系。结果认为，转育后代不育株受年度间气温变化的影响，长日高温的１９９４年与正常气温年份的１９９５年相比，套袋自交结实率和自然结实率有较明显的下降趋势，表现出长日高温下不育，长日低温下可育的光温敏核的特性。但是仍达不到不育系的达标指数（不育率９９．５％）。其主要原因我们认为，现已利用的不育系供体是在长江流域气候生态条件下选育的，不育起点温度以２３～２４℃为指标，而黑龙江省水稻抽穗前６月下旬到８月上旬期间，只有７月中旬平均气温超过２３℃。所以，黑龙江省寒地适宜的不育系应选育光温敏温度宽（宜在２１．５～２８℃之间）、长光对低温的补偿作用强的水稻光温敏核不育系。更多还原

【Abstract】 This article studied the sterile lines chosen from the back cross generations which took EI (early season indica rice) in Heilong jiang Province as receptive parents and the introduced sterile lines of Nong ken 58S, 7001S, 3116S, C47S, Pei Ai 34S, B 14018S etc. as donors and the relation ships between bagged and natural seed set rate and temperature in 45°46′ north latitude. The study conclusion was the developed sterile lines were influenccd by the yearly change of temperatwe. Compared with 1995, a year in which temperature was normal, 1994, a year in which sunshine was longer and the average temperature was higher, had lower bagged seed set rate and natural seed set rate showing the property of photo thermo seansitive nucleus sterile in long day and high tcmperature and fertile in short day and low temperature. but the sterile rate in 1994 was still not reaching the standard of sterile lines (99.5%). The main reason is we supposed, the present used donors of sterility were chosen from those undev the natural ecological conditions of Changjiang Valley where the sterility beginning temperature is 23￣24℃,while in Heilongjiang province, the average temperature only in the middle ten days of july is above 23℃ from june to August. As a result we should choose the photo thermo sensitive genic sterile lines whose sensitive temperature is wide (21.5℃￣28℃), and those having strong long day compensation to low temperature in the frigid zone of Heilong jiang province.更多还原