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Molecular diversity in a germplasm collection of avocado accessions from the tropical and subtropical regions of China

文献类型: 外文期刊

作者: Ge, Yu 1 ; Hu, Fuchu 2 ; Tan, Lin 1 ; Wu, Bin 1 ; Wang, Tao 3 ; Zhan, Teng 4 ; Ma, Funing 1 ; Cao, Jianqiu 5 ; Xu, Zhining 1 ;

作者机构: 1.Chinese Acad Trop Agr Sci, Haikou Expt Stn, Haikou, Hainan, Peoples R China

2.Hainan Acad Agr Sci, Key Lab Trop Fruit Tree Biol Hainan Prov, Haikou, Hainan, Peoples R China

3.Liaoning Acad Agr Sci, Inst Vegetable, Shenyang, Liaoning, Peoples R China

4.Tianjin Derit Seed Ind Co Ltd, Tianjin, Peoples R China

5.Hainan Univ, Coll Hort & Landscape Architecture, Haikou, Hainan, Peoples R China

关键词: Persea americana; botanical races; microsatellite markers; genetic diversity

期刊名称:CROP BREEDING AND APPLIED BIOTECHNOLOGY ( 影响因子:1.282; 五年影响因子:1.493 )

ISSN: 1984-7033

年卷期: 2019 年 19 卷 2 期

页码:

收录情况: SCI

摘要: Avocado is an economically important crop and widely cultivated in the tropical and subtropical regions of China, whereas little is known about its genetic diversification. Twenty-six EST-SSR markers were developed based on avocado EST sequences. Molecular characterization was applied to assess the genetic relationships among different accessions. In total, nine gSSRs and nine EST-SSRs were selected to illuminate the genetic relationships within the 92 samples. Diversity parameters associated to the selected markers indicated the relatively low genetic diversity and a certain degree of inbreeding in the 92 avocado accessions. Clustering method and principal coordinate analysis clearly distinguished the accessions in accordance to the botanical races and geographic regions by molecular characterization. Moreover, the botanical race or hybrids of some unknown race accessions from different geographic origins could be determined based on known genotypes in the same cluster.

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