中籼杂交水稻新组合结实性的高温适应性鉴定  

The Spikelet Fertility of Sever Mid Mature Indica Hybrid Rice Combinations Under High Temperature Conditions

作　　者：曾汉来[1] 卢开阳[2] 贺道华 潘雪祥 张端品[1] 

机构地区：[1]华中农业大学农学系,武汉430070 [2]湖北省种子管理站,武汉430070

出　　处：《华中农业大学学报》2000年第1期1-4,共4页Journal of Huazhong Agricultural University

基　　金：863资助项目

摘　　要：为了评价中籼杂交组合产量性状对高温的适应性 ,在开花期对 3份Ⅱ优新组合进行了人工气候和分期播种的系列温度处理。结果表明 ,在人工控制气温条件下 ,这些组合的结实性在开花期的适宜日均温度为2 7～ 2 9℃ ,高于 32℃的日均温即引起结实性明显降低。供试组合在高温下结实性的稳定性依次为 :汕优 6 3>Ⅱ优 5 0 1 >Ⅱ优 838>Ⅱ优 6 3。To evaluate the ecological adaptability of spikelet fertility to high temperature, the seed set (%) of 5 high yield hybrid rice combinations (Shanyou63, Ⅱyou838,Ⅱyou501 and Ⅱyou63) under a series of different temperatures are observed. All temperature treatments are processed within the flowering stage in a group of artificial climate environment phytotron and green house with natural light. Results show that the optimal mean temperature to these combinations in heading phase is 27～29℃,and when the average temperature goes beyond 32℃, the seed set (%) will decrease obviously. The order of tested combinations of stability to high temperature is Shanyou63>Ⅱ you501>Ⅱ you838>Ⅱ you63. The methods using artificial climate environment to evaluate the yield ecological adaptability of rice variety/combination are discussed in this paper. \;

关 键 词：杂交水稻 生态适应性 高温 中灿型 结实性 产量 

分 类 号：S511.210.1[农业科学—作物学]