| 摘要: |
| 以489A等6个小育系和94FR30等6个恢复系配制不完全双列杂交组合，采用数量性状加性-显性遗传模型（AD）。对粳稻谷粒性状进行了遗传分析。结果表明，粳稻谷粒的粒长、村宽、粒厚、长宽比、长厚比等性状主要受基因的显性效应控制；显性方差比率（VD/VP）约为加性方差比率（VA/VP）的2倍，宽厚比和干粒重主要受基因的加性效应控制；在谷粒性状F1代的超亲优势（Hpb）预测中，各性状都有正向超亲优势的群体出现。 |
| 关键词: 粳稻 谷粒性状 遗传效应 加性-显性遗传模型 超亲优势 |
| DOI： |
| 分类号:S511.032 |
| 基金项目:宁夏回族自治区自然科学基金项目（2004-AA003） |
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| Genetic effect analysis of of grain trait in paddy rice |
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MA Hong-wen DAI Xiao-hua WANG Xin WANG Jian QIANG Ai-ling LIU Wei SHI Yan-li
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| Abstract: |
| Genetic effect analysis of grain traits was based on the experiment of paddy rice by using an addative-dominance genetic model(AD).The crosses were made by using six steriling lines(489A etc) as females and six resume lines(94FR30 etc) as males in incomplete diallel crosses.The results showed that the grain traits,such as grain length,grain width,grain thickness,ratio of grain length to width and ratio of grain length to thickness etc,were mainly controlled by dominance genetic effects;VD/Vp was twice the value of VA/Vp,and ratio of grain width to thickness and 1000-grain weight were mainly controlled by additive genetic effects.The groups of height beyond parent were presented on all grain traits through the predicted value of height beyond parent in F1 hybrids. |
| Key words: paddy rice grain traits genetic effect AD genetic model Hpb |
