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Development of Polymorphic Genic SSR Markers by Transcriptome Sequencing in the Welsh Onion (Allium fistulosum L.)

文献类型: 外文期刊

作者: Yang, Liuyi 1 ; Wen, Changlong 1 ; Zhao, Hong 1 ; Liu, Qianchun 1 ; Yang, Jingjing 1 ; Liu, Lecheng 3 ; Wang, Yongqin 1 ;

作者机构: 1.Beijing Acad Agr & Forestry Sci, Beijing Vegetable Res Ctr, Key Lab Biol & Genet Improvement Hort Crops North, Minist Agr, Beijing 100097, Peoples R China

2.Yangtze Univ, Coll Hort & Gardening, Jingzhou 434025, Peoples R China

3.Yangtze Univ, Col

关键词: simple sequence repeats (SSR);genic marker;transcriptome;genetic diversity;Allium fistulosum L.

期刊名称:APPLIED SCIENCES-BASEL ( 影响因子:2.679; 五年影响因子:2.736 )

ISSN: 2076-3417

年卷期: 2015 年 5 卷 4 期

页码:

收录情况: SCI

摘要: Transcriptome analysis is an efficient way to explore molecular markers in plant species, for which genome sequences have not been published. To address the limited number of markers published for the Welsh onion, this study found 6486 loci of genic simple sequence repeats (SSR), which consisted of 1-5 bp repeat motifs, based on next-generation sequencing (NGS) technology and the RNA-Seq approach. The most abundant motif was mononucleotide (52.33%), followed by trinucleotide (31.96%), and dinucleotide (14.57%). A total of 2525 primer pairs were successfully designed, and 91 out of 311 tested primers were polymorphisms. Overall, 38 genic SSR markers were randomly selected to further validate the degree of genetic diversity, and 22 genic SSR markers (57.89%) showed high levels of polymorphism. The average polymorphism information content (PIC) value and the number of alleles (Na) were 0.63 and 5.27, respectively, and the unweighted pair-group method with arithmetic average (UPGMA) cluster analysis grouped the 22 Allium accessions into three groups with Nei's similarity coefficients ranging from 0.37 to 0.99. This result suggested that these genic SSR markers could be used to develop a higher resolution genetic map and/or to analyze the phylogenetic relationships among Allium plants in the near future.

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