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作物学报

作物学报 ›› 2007, Vol. 33 ›› Issue (09): 1393-1398.

• 研究论文 •    下一篇

国外种质对中国大豆育成品种遗传贡献的分子证据

关荣霞1,**;郭娟娟1,2,**;常汝镇1;邱丽娟1,*   

  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新疆农业大学农学院，新疆乌鲁木齐830052
  • 收稿日期:2006-12-04 修回日期:1900-01-01 出版日期:2007-09-12 网络出版日期:2007-09-12
  • 通讯作者: 邱丽娟

Marker-Based Evidence of Broadening the Genetic Base of Chinese Soybeans by Using Introduced Soybeans

GUAN Rong-Xia1**,GUO Juan-Juan12**,CHANG Ru-Zhen1,QIU Li-Juan1*   

  1. 1 The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI)/Key Laboratory of Germplasm & Biotechnology (MOA), Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 10008; 2 College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China
  • Received:2006-12-04 Revised:1900-01-01 Published:2007-09-12 Published online:2007-09-12
  • Contact: QIU Li-Juan

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1340

被引次数

20

摘要：

用SSR标记对32份中国大豆品种与40份国外引进大豆育成品种祖先亲本的遗传多样性进行分析，以明确引进国外大豆种质对中国大豆育种的遗传贡献。结果表明，在22个SSR位点共检测到170个等位变异，中国大豆和引进国外大豆平均等位变异数分别为6.0和6.9个，遗传多样性指数都为0.71，国外品种中检测到48个特有等位变异，而中国大豆中仅检测到22个，且共有等位变异在中外大豆中的分布频率差异较大。聚类分析也发现中国育成品种与国外引进大豆存在较大差异。遗传组成分析发现，Amsoy和十胜长叶2个国外种质的引入使5个中国大豆育成品种增加了23个国外种质特有等位变异；其在育成品种中的保留比例为29.13%，但不同遗传背景中保留的等位变异不同，说明国外种质在中国大豆育种中起着重要作用，而且仍有很多特有等位变异没有被利用，可以继续作为亲本在中国大豆改良中发挥作用。

关键词: 大豆, 育成品种, 引进种质, 遗传贡献

Abstract:

Molecular marker analysis can be used to quantify diversity of Chinese and introduced soybean germplasm and can provide useful information for the relationship of these materials. The genetic diversity of 32 Chinese varieties and 40 foreign ancestral cultivars were investigated by 22 SSR markers. One hundred and seventy alleles were detected, with an average of 6.0 and 6.9 in Chinese and foreign materials, respectively. The polymorphism information content (PIC) was 0.71 in both populations, which indicated a relatively high genetic diversity. There were 48 specific alleles in foreign materials and only 22 in Chinese varieties. The frequency of the alleles in common was very different in the two populations. Great differentiation was also observed between the two populations when UPGMA cluster analysis was used. We analyzed the pedigree of 5 Chinese cultivars derived from two introduced soybean cultivars, Amsoy and Tokachi nagaha, and found 23 specific alleles from foreign materials. The reserved specific alleles were different in each genetic background, and 29.13% specific alleles were reserved in total. This indicated that the introduction of foreign materials in Chinese soybean breeding increased the soybean genetic diversity. For foreign materials, more specific alleles have not been used yet, and should be used as parental materials in elite lines breeding in the future to enlarge the genetic bases of Chinese soybean.

Key words: Soybean, Cultivars, Soybean germplasm introduction, Genetic contribution

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