抽穗扬花期高温对水稻重组自交系群体RIL47结实率的影响  

Effect of high temperature at heading and flowering stage on seed-setting rate of rice recombinant inbreed line population (RIL47)

作　　者：周浩[1,2] 胡文彬[2,3] 王作平[2] 彭克勤[1] 肖国樱[2] 

机构地区：[1]湖南农业大学生物科学技术学院,长沙410128 [2]中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,长沙410125 [3]湖南农业大学农学院,长沙410128

出　　处：《中国生态农业学报》2011年第1期69-74,共6页Chinese Journal of Eco-Agriculture

基　　金：国家科技支撑计划区域项目(2007BAD77B03);湖南省杰出青年基金项目(03JJY1004)资助

摘　　要：以水稻重组自交系群体RIL47的254个株系为材料,在抽穗扬花期于逆境气候鉴定室进行高温处理,并设自然常温对照,研究了高温对RIL47群体结实率的影响。结果表明,自然条件下该群体结实率正常且呈正态分布;而高温处理下RIL47群体结实率极显著下降,平均降幅达81.6%,结实率下降绝对值符合正态分布。同时,以热害指数为筛选指标,从RIL47中筛选出5个耐高温株系(07H1619、1590、1521、1706、1608)和3个高温敏感株系(07H1751、1710、1719),可用于水稻抗高温相关研究。Rice recombinant inbreed line population RIL47 （comprising 254 lines） was treated with high and natural （CK） temperatures at heading and flowering stage and the effect of high temperature on seed-setting rates evaluated. The results indicated that seed-setting rate of RIL47 followed a normal distribution curve under natural conditions. Compared with natural temperature, high temperature significantly decreased RIL47 seed-setting rate with an average decline of 81.6%. Absolute decline in RIL47 seed-setting rate followed a normal distribution curve. Five heat-tolerant lines （07H1619, 1590, 1521, 1706 and 1608） and three heat-sensitive lines （07H1751, 1710 and 1719） were simultaneously selected from the 254 RIL47 lines by using a heat-injure index. This could be used in analyzing heat resistance of rice.

关 键 词：高温 结实率 抽穗扬花期 重组自交系 水稻 

分 类 号：S184[农业科学—农业基础科学]