生态遗传雄性不育理论与两系杂交植物 Ⅶ.水稻CMS系Ⅱ-32A自交系的育性转换机制  

Theory of ecological-genetical male sterility and hybrid plants produced by two-line method Ⅶ.The fertility alteration mechanism for self-line of rice CMS line Ⅱ-32A

作　　者：莫俊杰[1] 何觉民[1] 陆建农[1] 何仪[1] 

机构地区：[1]广东海洋大学农业生物技术研究所,广东湛江524088

出　　处：《湖南农业大学学报（自然科学版）》2007年第3期262-266,共5页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：广东省科学技术厅重大专项(2003A2010101)

摘　　要：通过分期播种和人工气候箱定温处理试验,研究了CMS系Ⅱ-32A自交繁殖系Ⅱ-32A-4的育性转换机制,确定了其育性转换的临界温度.结果表明:Ⅱ-32A-4为高温不育,低温可育,长日对Ⅱ-32A-4的正常育性发育有一定的抑制作用,短日则反之.其育性转变的临界温度为25.5℃,而11.87 h/d以下的日长对其育性的恢复也有一定影响.与Ⅱ-32A相比,Ⅱ-32A-4在较高温度条件下的不育性稳定性变好,天然异交结实率提高,有效分蘖数增加.By investi gating the mechanism of the fertility alteration critical temperature of Ⅱ-32A-4, selected from the CMS line Ⅱ-32A were determined in sequential sowing and disposing in phytotrons at nine temperature point of transition. The main results are as below： Ⅱ-32A-4 show sterility under high temperature condition while fertility under low temperature condition. Photoperiod had an effect somewhat, the longday-length restrained the development of the male to some extent, but the shortday-length promoted its male development. The fertility alteration of Ⅱ-32A-4 was mainly govered by temperature. Its critical temperature point was 25.5 ℃. And its fertility recovery was also promoted partly by the short day-length of below Ⅰ 1.87 h/d. The sterility of Ⅱ-32A-4 became stable under higher temperature. The cross-pollination traits of Ⅱ-32A-4 were improved and effective tillers were increased compared with Ⅱ-32A,

关 键 词：水稻CMS系 Ⅱ-32A Ⅱ-32A-4 自交系 育性转换机制 改造效果 

分 类 号：S511.035.1[农业科学—作物学]