抽穗扬花期高温对水稻重组自交系群体RIL47结实率的影响.PDF

2011 1 19 1 Chinese Journal of Eco-Agriculture, Jan. 2011, 19(1): 6974 DOI: 10.3724/SP.J.1011.2011.00069 RIL47 * 1,2 2,3 2 1 2** 周 浩 胡文彬 王作平 彭克勤 肖国樱 (1. 410128; 2. 410125; 3. 410128) 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。 高温 结实率 抽穗扬花期 重组自交系 水稻 : S184 : A : 1671-3990(2011)01-0069-06 Effect of high temperature at heading and flowering stage on seed-setting rate of rice recombinant inbreed line population (RIL47) 1,2 2,3 2 1 2 ZHOU Hao , HU Wen-Bin , WANG Zuo-Ping , PENG Ke-Qin , XIAO Guo-Ying (1. College of Bioscience Biotechnology, Hunan Agricultural University, Changsha 410128, China; 2. Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; 3. College of Agronomy, Hunan Agricultural University, Changsha 410128, China) Abstract Rice recombinant inbreed line population RIL47 (comprising 254 lines) was treated with high and natural (CK) tempera- tures 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