| 栽培稻的基因型差异程度和分类 |
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| 引用本文： | 李任华,徐才国.栽培稻的基因型差异程度和分类[J].作物学报,1999,25(4):518-526. |
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| 作者姓名： | 李任华 徐才国 |
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| 作者单位： | 中国农业大学，北京，100094 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 本文利用来自一个籼/粳交(圭630/02428)的双单倍体(DH)系和由多种类型的籼、粳品种(系)组成的对照组，从分子水平上研究亚洲栽培稻的基因型差异。结果表明，栽培稻中存在两种主要的差异类型，即质的差异和量的差异。前者主要存在于籼、粳分化程度比较高的对照组中，85%以上的有关位点已经发生了籼或粳的分化趋向；后者主要存
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| 关 键 词： | 基因型差异 质的差异 量的差异 栽培稻分类 |
| 收稿时间： | 1998-11-25 |
| 修稿时间： | 1998-02-13 |
Genotypic Divergence and Classification of Asian Cultivated Rice (Oryza sativa L. ) |
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| Li Renhua,Xu Caiguo,Sun Chuanqing,Li Zichao,Wang Xiangkun.Genotypic Divergence and Classification of Asian Cultivated Rice (Oryza sativa L. )[J].Acta Agronomica Sinica,1999,25(4):518-526. |
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| Authors: | Li Renhua Xu Caiguo Sun Chuanqing Li Zichao Wang Xiangkun |
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| Institution: | China Agricultural University, Beijing 100094 |
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| Abstract: | The extent of genotypic divergence of the Asian cultivated rice was investigated at the molecular level, using two sets of rice materials, i. e. , a set of doubled haploid lines, and another set of Indica or Japonica cultivars (lines) representing a broad spectrum of the Asian cultivated rice gene pool including landraces, primitive cultivators, historically important cultivators, modern elite cultivators, new plant type rice and parents of superior hybrids. Results showed that two major types of genotypic divergence were exhibited, that is, qualitative and quantitative divergence. The former was mainly existed in the second set of apparently classified Indica and Japonica lines in which more than 85% of diagnostic marker loci (DMLs) have well differentiated into Indica or Japonica, while the latter was mainly exhibited in DH lines in which only 51.5% of DMLs are differentiating toward Indica or 48. 5% are differentiating toward Japonica. A relation was preliminarily established between the extent of genotypic divergence and classification, based on the data of 41 diagnostic marker loci and morphological traits. |
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| Keywords: | Oryza sativa L Genotypic divergence Classification |
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