以湖南和湖北大豆[Glycine max（L.）Merr.]为例分析影响遗传多样性评价的因素

作物学报 ›› 2007, Vol. 33 ›› Issue (03): 461-468.

以湖南和湖北大豆[Glycine max（L.）Merr.]为例分析影响遗传多样性评价的因素

关媛¹;鄂文弟^1,3;王丽侠¹;关荣霞¹;刘章雄¹;常汝镇¹;曲延英²;邱丽娟^1,*

¹中国农业科学院作物科学研究所，国家农作物基因资源与遗传改良重大科学工程/农业部作物种质资源与生物技术重点开放实验室，北京 100081；²新疆农业大学，新疆乌鲁木齐 830052；³东北农业大学，教育部大豆生物学重点实验室，黑龙江哈尔滨 150030

收稿日期:2006-01-26 修回日期:1900-01-01 出版日期:2007-03-12 网络出版日期:2007-03-12
通讯作者: 邱丽娟

Analysis of Factors Influencing the Genetic Diversity Evaluation Using Two Soybean[Glycine max（L.）Merr.] Collections from Hunan and Hubei

GUAN Yuan ¹;E Wen-Di ^1,3; WANG Li-Xia¹;GUAN Rong-Xia¹;LIU Zhang-Xiong ¹;CHANG Ru-Zhen ¹;QU Yan-Ying ²;QIU Li-Juan^1,*

¹ National Key Facility of Crop Gene Resources and Genetic Improvement / Key Laboratory of Crop Germplasm & Biotechnology, Ministry of Agriculture / Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081;² Xinjiang Agricultural University, Urumchi 830052, Xinjiang; ³ Northeast Agricultural University, Key Laboratory of Soybean biology. Ministry of Education, Harbin 150030, Heilongjiang, China

Received:2006-01-26 Revised:1900-01-01 Published:2007-03-12 Published online:2007-03-12
Contact: QIU Li-Juan

摘要/Abstract

摘要：

以不同来源大豆种质为材料进行基因组SSR分析，探讨大豆遗传多样性研究方法，旨在为科学评价大豆种质资源提供参考。当取样比例相同时，湖北大豆的遗传丰富度显著高于湖南大豆，但两省大豆遗传多样性指数之间没有显著差异。当取样量相同时，利用随机取样法比较，湖南大豆的遗传多样性显著高于湖北，而利用聚类取样比较，两省大豆的遗传多样性没有显著差异。在遗传多样性指数相同情况下，湖北大豆的遗传丰富度显著高于湖南大豆。取样数与三个遗传多样性评价参数（等位变异数、Shannon指数、He）之间均达到显著和极显著相关。以湖南大豆为例，估算出在大豆SSR遗传多样性分析中，至少需要50~60个样本，即占总体9.0%~10.8%的取样比例，才能代表总体的遗传变异。提出在评价大豆遗传多样性时，应用大豆样本数对其遗传多样性指数计算公式进行修正，建议将Shannon指数计算公式改为H＝－lnN ∑P_i lnP_i (N为样本数)。根据修正公式分析，结果表明，湖北大豆的遗传多样性高于湖南大豆。

关键词: 大豆, 遗传多样性, SSR标记, Shannon指数, 期望杂合度, 等位变异数, 取样量

Abstract:

Accessions from Hunan and Hubei provinces in the Chinese soybean pre-core collection were analyzed with SSR markers to determine an optimal strategy in genetic diversity evaluation. The results showed that when analyzed with the same sampling ratio, the number of alleles in accessions from Hubei province was higher than those from Hunan province, however the difference was not up to significant level in genetic diversity index. When analyzed with same sample size by random sampling, accessions from Hunan province were higher both in number of alleles and diversity index than those from Hubei, while there was no significant difference between them as sampled based on cluster. Accessions from Hubei were larger in number of alleles than those from Hunan when sampled by the same genetic diversity index. Genetic diversity index was influenced by sample size as we concluded, and we deduced that in genetic diversity analysis, a minimum of 50–60 accessions (9.0%–10.8% percent of total accessions) was required to represent most of genetic variation, so that it could explain the total genetic variation. An adjustment of the formula for Shannon index was also proposed after a set of analyses based on accessions from Hunan and Hubei. And with it, accessions from Hubei showed higher genetic diversity than those from Hunan province.

Key words: Soybean, Genetic diversity, SSR Markers, Shannon index, He, Number of alleles, Sample size

关媛;鄂文弟;王丽侠;关荣霞;刘章雄;常汝镇;曲延英;邱丽娟. 以湖南和湖北大豆[Glycine max（L.）Merr.]为例分析影响遗传多样性评价的因素[J]. 作物学报, 2007, 33(03): 461-468.

GUAN Yuan ;E Wen-Di ; WANG Li-Xia;GUAN Rong-Xia;LIU Zhang-Xiong ;CHANG Ru-Zhen ;QU Yan-Ying ;QIU Li-Juan ;. Analysis of Factors Influencing the Genetic Diversity Evaluation Using Two Soybean[Glycine max（L.）Merr.] Collections from Hunan and Hubei[J]. Acta Agron Sin, 2007, 33(03): 461-468.

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