低温时长对粳型光温敏核不育系GB028S育性转换的影响  

Effect of Low Temperature Duration on Fertility Alteration of Japonica PTGMS GB028S

作　　者：于亚辉[1,2] 唐亮[1] 刘郁[2] 阙补超[2] 夏明[2] 王莹[2] 郑英杰[2] 李振宇[2] 陈广红[2] 徐正进[1] 

机构地区：[1]沈阳农业大学水稻研究所/农业部东北水稻生物学与遗传育种重点实验室/教育部北方超级粳稻遗传育种重点实验室,沈阳110161 [2]辽宁省盐碱地利用研究所,辽宁盘锦124010

出　　处：《沈阳农业大学学报》2012年第6期745-748,共4页Journal of Shenyang Agricultural University

基　　金：沈阳农业大学青年教师科研基金项目(20101010);国家自然科学基金项目(31201158)

摘　　要：用20℃的低温对GB028S分别处理1,3,5,7d,研究不同低温时长对粳型光温敏核不育系育性转换的影响。结果表明:低温使各处理抽穗期滞后2～8d。1d和3d的低温处理下,GB028S花粉不育度大于99.5%,育性没有转换;5d和7d的低温处理下,GB028S的花粉不育度为98.33%和94.33%,自交结实率为2.64%和5.04%,育性恢复。GB028S的临界温度接近20℃,其低温敏感时期的辨别标准为剑叶叶枕距-3～1cm。The fertility alteration of GB028S, a japonica photo-thermo-sensitive genic male sterile （PTGMS） line was studied at 20℃low temperature for ld, 3d, $d and 7d. Low temperature caused heading stage lag for 2-8d. Pollen sterility of ld and 3d was more than 99.5%, so low temperature of ld and 3d had no effect on fertility of GB028S. Pollen sterility of 5d and 7d was 98.33% and 94.33%, bagged seed set of them was 2.64% and 5.04%. The low temperature of 5d and 7d not only decreased remarkably pollen sterility but also induced some extent of self fertility. The critical temperature was nearly 20~C for GB028S. The most sensitive stage of temperature on fertility alteration was that rice was that rice was at -3-1cm of UPI（upmost pulvinus interval, i.e., the length from the pulvinus of the 2nd leaf from the top to that of flag leaf）.

关 键 词：水稻 粳型光温敏核不育系 低温 育性转换 

分 类 号：S511[农业科学—作物学]