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Genetic Diversity and Population Structure of Elite Foxtail Millet [Setaria italica (L.) P. Beauv.] Germplasm in China

文献类型： 外文期刊

作者： Liu, Zhengli 1 ; Bai, Guihua 1 ; Zhang, Dadong 1 ; Zhu, Chengsong 1 ; Xia, Xueyan 2 ; Cheng, Ruhong 2 ; Shi, Zhigang 2 ;

作者机构： 1.Kansas State Univ, Dept Agron, Manhattan, KS 66506 USA

2.Hebei Acad Agr & Forestry Sci, Inst Millet Crops, Shijiazhuang 050031, Hebei, Peoples R China

3.ARS, USDA, Hard Winter Wheat Res Unit, Manhattan, KS 66506 USA

关键词： simple sequence repeat markers: SSR markersChina: Asia;Palearctic region;geographic origin;genetic diversity;drought tolerance;breeding program;population structure;pedigree information;polymorphism information content;severe water deficiency;limited genetic resource

期刊名称：CROP SCIENCE （ 影响因子：2.319； 五年影响因子：2.631 ）

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收录情况： SCI

摘要： China is among the countries that have the most severe water deficiency. Due to its excellent drought tolerance, foxtail millet [Setaria italica (L.) P. Beauv.] has become one of the important cereal crops in China. Information on genetic diversity and population structure of foxtail millet may facilitate effective use of limited genetic resources in breeding programs. In this study, a selected panel of 128 accessions was screened with 79 simple sequence repeat (SSR) markers to investigate genetic diversity and population structure of foxtail millet. The panel was selected from 3356 germplasm collections from three major ecological areas of China: North, Northwest, and Northeast China. The mean genetic diversity was 0.75 and the mean polymorphism information content (PIC) was 0.72, indicating a high level of genetic diversity across the panel. Structure analysis identified six groups, which matches with their pedigree information, in general, but not with their geographic origins. Germplasm in Group 2 (G2) have unique geographic origins and pedigrees, which is different from other five groups; thus, crosses of accessions in this group to accessions from other groups are more likely to generate expected recombination for developing both conventional and hybrid cultivars.

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