| 水稻抽穗期数量性状基因的定位及遗传效应分析 |
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| 引用本文： | 郭晶心,陈忠正,刘耀光.水稻抽穗期数量性状基因的定位及遗传效应分析[J].分子植物育种,2004,2(6):788-794. |
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| 作者姓名： | 郭晶心 陈忠正 刘耀光 |
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| 作者单位： | 华南农业大学生命科学学院遗传工程研究室,广州,510642 |
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| 基金项目： | 本项目由广东省自然科学基金(B201,20003023)资助. |
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| 摘 要： | 本研究利用特早抽穗粳稻品种石狩白毛和籼稻品种明恢63杂交的F2分离群体共116株，构建了含88个共显性分子标记的连锁图谱，对水稻(Oryza sativA L．)抽穗期进行基因定位。利用2种分析软件MAPMAKER／QTL和QTLMapper进行分析，共检测到3个抽穗期的数量性状基因座(QTLs)。2个软件共同发现第7染色体上RM214与A5106标记区间内存在1个主效QTL Hd7a（Hd7c)，来自明恢63的这个位点的等位基因可使抽穗期延迟。其余2个QTLs分别位于第7、9染色体上。同时检测到有5对位点间存在上位性作用，但相对贡献率较小，表明上位性效应也是影响抽穗期的遗传基础。
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| 关 键 词： | 水稻 抽穗期 数量性状基因 基因定位 遗传效应 上位性效应 |
Identification of QTLs Controlling Rice Heading Date and Analysis of the Genetic Effects |
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| Guo Jingxin Chen Zhongzheng Liu YaoguangGenetic Engineering Lab,College of Life Science,South China Agricultural University,Guangzhou.Identification of QTLs Controlling Rice Heading Date and Analysis of the Genetic Effects[J].Molecular Plant Breeding,2004,2(6):788-794. |
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| Authors: | Guo Jingxin Chen Zhongzheng Liu YaoguangGenetic Engineering Lab College of Life Science South China Agricultural University Guangzhou |
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| Institution: | Guo Jingxin Chen Zhongzheng Liu Yaoguang*Genetic Engineering Lab,College of Life Science,South China Agricultural University,Guangzhou,510642 |
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| Abstract: | Quantitative trait loci (QTL) were identified for heading date in rice (Oryza sative L.) using an F2 population derived from a cross between a japonica variety, Shishoubaimao, and an indica variety Minghui63. A total of three QTLs for heading date were detected with two software MAPMAKER/QTL and QTLMapper. Scan-analysis revealed the existence of a QTL with major effect in the interval between marker RM214 and A5106 on chromosome 7. The allele of this locus from Minghui63 delayed days-to-heading of the hybrids. In addition, two QTLs with relatively smaller effects were found to be located on chromosome 7 and 9. Five pairs of QTLs with epistatic effect minor contributions to heading date were detected, demonstrating the existence of epistasis as a genetic basis of heading date in rice. |
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| Keywords: | Rice Heading date Quantitative trait loci (QTL) Epistasis |
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