水稻光温敏核不育系的温敏期研究

• 作 者: 陈雄辉 万邦惠 陈伟栋 梁克勤
• 机 构: 华南农业大学农学系
• 出 处: 华南农业大学学报
• 发表日期: 1996年01期
• 关键词: 光温敏核不育系 温敏 育性转换 敏感期 花粉育性 均温 核不育 多元回归 万邦惠 温度因素

以农垦５８Ｓ为基因供体转育的ｗ６１５４Ｓ，Ｋｓ－９，Ｎ１２Ｓ，Ｎ１５Ｓ，Ｎ１８Ｓ５个籼稻光温敏核不育系，于１９９１～１９９３年在广州自然条件下观察了它们的育性变化，对温度诱导其育性转换规律进行了相关，多元回归及通径分析。结果表明：１．不同的不育系，其温敏性越强不育系温敏期越长。同一不育系，日最低温温敏期最长，日均温其次，日最高温最短。２．不同不育系各温度因素对花粉育性的影响不同。有的以日最低温影响最大；有的以日均温影响最大。各温度因素之间的作用有的相差悬殊；有的则相差较小。３．温敏期内通常有２～３个强温敏时段，它们因不育系不同而分布的区段不同；同一不育系，日最低温、日均温、日最高温的强温敏时段分布也有差异。

Five genomic male sterile lines, w6154S, Ks-9, N12S, N15S and N18S, were selected from Nongken 58S as a gene donor. Their fertility changes were observed under natural conditions in Guangzhou from 1991 to 1993, Temperature-induced fertility conversion rules were correlated, multiple regression and path analysis. The result shows: 1. The different male sterile lines, the more temperature-sensitive male sterile line longer temperature-sensitive period. The same sterile line, the lowest temperature in Japan the longest, the average daily temperature followed by the shortest daily maximum temperature. 2. The effects of different temperature factors on pollen fertility were different in different CMS lines. Some have the greatest impact on the lowest temperature day; some have the greatest impact on the average daily temperature. The role of the temperature difference between some differences; while others differ less. 3. During the temperature-sensitive period, there are usually 2 ~ 3 intense temperature-sensitive periods, which are different due to different male sterile lines; the same temperature-sensitive periods with the lowest temperature, the average daily temperature and the highest temperature in the same sterile line There are also differences.