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SNP-revealed genetic diversity in wild emmer wheat correlates with ecological factors

文献类型： 外文期刊

作者： Ren, Jing 2 ; Chen, Liang 1 ; Sun, Daokun 1 ; You, Frank M. 3 ; Wang, Jirui 3 ; Peng, Yunliang 5 ; Nevo, Eviatar 6 ; Beil 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Plant Germplasm Enhancement & Specialty A, Wuhan 430074, Peoples R China

2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

3.Univ Calif Davis, Dept Plant Sci, Davis, CA 95616 USA

4.Agr & Agri Food Canada, Cereal Res Ctr, Winnipeg, MB R3T 2M9, Canada

5.Sichuan Acad Agr Sci, Inst Plant Protect, Chengdu 610066, Sichuan, Peoples R China

6.Univ Haifa, Inst Evolut, IL-31905 Haifa, Israel

7.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430071, Hubei, Peoples R China

8.Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO 8052

关键词： Triticum dicoccoides;SNP marker;Adaptive genetic diversity;Population structure;Natural selection

期刊名称：BMC EVOLUTIONARY BIOLOGY （ 影响因子：3.26； 五年影响因子：3.732 ）

ISSN： 1471-2148

年卷期： 2013 年 13 卷

页码：

收录情况： SCI

摘要： Background: Patterns of genetic diversity between and within natural plant populations and their driving forces are of great interest in evolutionary biology. However, few studies have been performed on the genetic structure and population divergence in wild emmer wheat using a large number of EST-related single nucleotide polymorphism (SNP) markers. Results: In the present study, twenty-five natural wild emmer wheat populations representing a wide range of ecological conditions in Israel and Turkey were used. Genetic diversity and genetic structure were investigated using over 1,000 SNP markers. A moderate level of genetic diversity was detected due to the biallelic property of SNP markers. Clustering based on Bayesian model showed that grouping pattern is related to the geographical distribution of the wild emmer wheat. However, genetic differentiation between populations was not necessarily dependent on the geographical distances. A total of 33 outlier loci under positive selection were identified using a FST-outlier method. Significant correlations between loci and ecogeographical factors were observed. Conclusions: Natural selection appears to play a major role in generating adaptive structures in wild emmer wheat. SNP markers are appropriate for detecting selectively-channeled adaptive genetic diversity in natural populations of wild emmer wheat. This adaptive genetic diversity is significantly associated with ecological factors.

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