The genetic diversity of annual wild soybeans grown in China

文献类型： 外文期刊

第一作者： Dong, YS

作者： Dong, YS;Zhuang, BC;Zhao, LM;Sun, H;He, MY

作者机构：

关键词： annual wild soybean;genetic diversity;origin;germplasm;diversity center

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2001 年 103 卷 1 期

页码：

收录情况： SCI

摘要： Annual wild soybeans (Glycine soja), the ancestors of cultivated soybeans (G. max), are important sources of major genes for resistance to pests, diseases and environmental stresses. The study of their genetic diversity is invaluable for efficient utilization. conservation and management of germplasm collections. In this paper, the number of accessions. the variation of traits. the genetic diversity indexes (Shannon index) and the coefficient of variation were employed to study the geographical distribution of accessions, genetic diversity of characters and genetic diversity centers of annual wild soybean by statistical analysis of the database from the National Germplasm Evaluation Program of China. Most annual wild soybeans are distributed in Northeast China. and the number of accessions decreases from the Northeast to other directions in China. The genetic diversity indexes (Shannon index) were 0.49, 0.74. 0.02, 0.55, 1.45. 2.41, 1.27 and 1.89 for flower color. sootiness of seed coat. cotyledon color. pubescence color. hilum color. leaf shape, stem type and seed color, respectively. Coefficients of variation were 7.1%. 28.7%, 76.43% and 18.2% for protein content, oil content, 100-seed weight and days to maturity, respectively. Three genetic diversity centers, the Northeast. the Yellow River Valley and the Southeast Coasts of China, are proposed based on the geographical distribution of the number of accessions, genetic diversity and the multivariate variation coefficient. Based on these results and Vavilov's theory of crop origination, two opposing possible models for the formation of the three centers are proposed, either these centers are independent of each other and the annual wild soybeans in these centers originated separately, or the Northeast center was the primary center for annual wild soybeans in China. while the Yellow River Valley center was derived from this primary center and served as the origin for the Southeast Coast center.

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