Genetic and Correlation Analysis of Grain Characters in Three-line Hybrid Rice  

三系杂交水稻谷粒性状的遗传及相关分析(英文)

作　　者：邹小云[1,2] 邓辉明 傅军如[1] 彭小松[1] 朱昌兰[1] 贺晓鹏[1] 陈小荣[1] 贺浩华[1] 刘宜柏[1] 

机构地区：[1]江西农业大学农学院／江西省作物生理生态与遗传育种重点实验室,江西南昌330045 [2]江西省农业科学院作物研究所,江西南昌330200 [3]江西省萍乡市农科所,江西萍乡337000

出　　处：《Agricultural Science & Technology》2009年第2期77-81,共5页农业科学与技术（英文版）

基　　金：国家自然科学基金(305600731);国家科技支撑计划(2006BAD01A01);江西省重大科技创新项目;江西省科技攻关项目(200210100201)资助~~

摘　　要：Abst[Objective] This study was to understand the genetic dynamics of three-line hybrid rice, and explore the respective effect of sterile line and restoring line on grain characters of hybrid rica. [Method] Four three-line stedle lines and 27 restoring lines（cultivars） commonly culti- vated in Central China region were regarded as expadmental materials to conduct 4 x27NCII cross design, and the grain characters of three-line hybrid rico were analyzed at genetic and correlation levels. [ Result] Four characters of grain length, grain width, 1 000-grain weight and length- width ratio play the leading role in additive gene effect; these four characters were simultaneously influenced by male parent and female parent, but the effect from male parent was relatively larger. The grain length, grain width, 1 000-grain weight and length-width ratio all have high brood hedtabUities（ respectively 99.65%, 98.31%, 95.27% and 98.81% ）. Correlation analysis showed that grain length was positively correlated with 1 000-grain weight and length-width ratio at extremely significant level; 1 000-grain weight was positively correlated with grain length and length- width ratio at extremely significant level, and was insignificantly correlated with grain width; grain width was negatively correlated with grain length and length-width ratio at extremely significant level. Path analysis showed that the direct path coefficients of grain length, grain width and 1 0（30- grain weight to length-width ratio were 0.624 6, -0.555 9 and -0.015 8, respectively. [ Conclusion] This study systematically analyzed the effects of stedle line and restoring line on grain characters of hybrid rice, which provided theoretical basis for breeding high quality and yield hy- brid dce.1材料与方法1．1材料不育系：金23A、11-32A、优IA、珍汕97A；恢复系（品种）：桂99、广陆矮4号、桂朝2号、窄叶青8号、特青、胜优2号、比四稻、常杂3号、晚三、培C311、明恢86、明恢63、南京11号、9311、金陵57、盐籼1号、93—9、贵辐籼3号、黔籼2号、IR36、IR24、IR72、密阳46、密阳54、密阳42、水源287、水源290。

关 键 词：Three-line hybrid dce Grain characters INHERITANCE . Correlation 

分 类 号：S511[农业科学—作物学] O212.1[理学—概率论与数理统计]