摘要
[目的]研究三系杂交稻谷的遗传动态,探索不育系和恢复系各自对杂交稻谷粒性状的影响。[方法]利用华中地区常用的4个三系不育系与27个恢复系(品种)为供试材料,组成4×27NCⅡ交配设计,对三系杂交稻谷粒性状进行了遗传及相关分析。[结果]谷粒长、粒宽、千粒重和长宽比等4个性状均为加性基因效应起主导作用;谷粒长、粒宽、千粒重和长宽比同时受到父母本的影响,但受父本的影响比受母本的影响大。谷粒长、粒宽、千粒重和长宽比都有很高的广义遗传力,分别为99.65%、98.31%、95.27%和98.81%。相关分析表明,粒长与千粒重和长宽比均达极显著正相关;千粒重与粒长和长宽比均达极显著正相关,与粒宽未达显著相关;粒宽与粒长和长宽比达极显著负相关。通径分析表明,粒长、粒宽和千粒重对长宽比的直接通径系数分别为0.6246、-0.555 9和-0.015 8。[结论]该研究系统分析了不育系和恢复系对杂交稻谷粒性状的影响,为杂交水稻高产、优质育种提供了理论基础。
[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 rice. [Method] Four three-line sterile lines and 27 restoring lines（cultivars） commonly cultivated in Central China were regarded as experimental materials to conduct 4×27NCⅡ cross design, and the grain characters of three-line hybrid were analyzed at genetic and correlation levels. [Result] Four characters of grain length, grain width, 1000-grain weight and length- to-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, 1000-grain weight and length-to-width ratio all have high broad heritabilities （respectively 99.65 %, 98.31% , 95.27% and 98.81% ）. Correlation analysis showed that grain length was positively correlated with 1000-grain weight and length-to-width ratio at extremely significant level; 1000-grain weight was positively correlated with grain length and length-to-width ratio at extremely significant level, and was insignificantly correlated with grain width; grain width was negatively correlated with grain length and length-to-width ratio at extremely significant level. Path analysis showed that the direct path coefficients of grain length, grain width and 1000-grain weight to length-to-width ratio were 0.624 6, -0.5559 and -0.0158, respectively.[Conclusion] This study systematically analyzed the effects of sterile line and restoring line on grain characters of hybrid rice, which provided theoretical basis for breeding high quality and yield hybrid rice.
出处
《安徽农业科学》
CAS
北大核心
2009年第18期8391-8393,8427,共4页
Journal of Anhui Agricultural Sciences
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
关键词
三系杂交稻
谷粒性状
遗传
相关
Three-line hybrid rice
Grain characters
Inheritance
Correlation
作者简介
邹小云（1978-），男，江西新余人，硕士，助理研究员，从事作物遗传与育种研究。
通讯作者：贺浩华。
