| 云南红豆杉天然群体的遗传多样性和群体分化 |
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| 引用本文： | 吴丽圆,陈少瑜.云南红豆杉天然群体的遗传多样性和群体分化[J].中南林业科技大学学报,2001,21(3):37-40. |
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| 作者姓名： | 吴丽圆 陈少瑜 |
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| 作者单位： | 吴丽圆（云南省林业科学院云南省森林植物培育与开发利用重点实验室，中国云南昆明 650204）
陈少瑜（云南省林业科学院云南省森林植物培育与开发利用重点实验室，中国云南昆明 650204） |
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| 基金项目： | 中国林科院林业部林木培育重点实验室开放研究基金资助项目. |
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| 摘 要： | 利用云南红豆杉Taxusyunnanensis种子的单倍体胚乳,采用水平淀粉凝胶电泳技术,对分布于金沙江流域的云南红豆杉天然群体的遗传多样性和群体分化进行了研究.对8个酶系统15个酶位点的分析结果表明该地区的云南红豆杉天然群体遗传变异水平较高,多态位点比率P=0.933,等位基因平均数A=2.90.平均期望杂合度He=0.290;4个小群体间遗传分化很小.基因分化系数GST=0.071.云南红豆杉天然群体具有明显丰富的遗传变异和较小的群体间分化,其原因是云南红豆杉寿命长、风媒异花授粉、种子传播、基因交流频繁.
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| 关 键 词： | 云南红豆杉 遗传多样性 群体分化 |
| 文章编号： | 1000-2502(2001)03-0037-04 |
| 修稿时间： | 2000年8月21日 |
Genetic Diversity and Population Differentiation of Taxus yunnanensis in the Jingsha River Valley |
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| WU Li yuan,CHEN Shao yu.Genetic Diversity and Population Differentiation of Taxus yunnanensis in the Jingsha River Valley[J].Journal of Central South Forestry University,2001,21(3):37-40. |
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| Authors: | WU Li yuan CHEN Shao yu |
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| Abstract: | The genetic diversity and population differentiation of Taxus yunanensis Cheng et L K Fu were studied among four populations in the Jingsha River Valley, using the method of horizontal starch gel electrophoresis with the material of endosperm. Allozyme data for fifteen loci of eight enzymes indicated a high level of genetic variability in this region with P = 0.933 , A =2.90 and H e = 0.290 . In contrast, there existed a low degree of differentiation among the four populations( G ST =0.071). The high interpopulational variability and weak interpopulational heterogeneity of T.yunanensis in the Jingsha River Valley could be from the impacts of the following factors long life cycle, wind pollination, seed dissemination and frequent interflow of genes. |
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| Keywords: | Taxus yunnanensis genetic diversity population differentiation |
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