Sequencing of the chloroplast genomes of cytoplasmic male-sterile and male-fertile lines of soybean and identification of polymorphic markers
文献类型: 外文期刊
作者: Lin, Chunjing 1 ; Zhang, Chunbao 2 ; Zhao, Hongkun 2 ; Xing, Shaochen 2 ; Wang, Yumin 2 ; Liu, Xiaodong 2 ; Yuan, Cuip 1 ;
作者机构: 1.Northeast Agr Univ, Coll Agr, Harbin 150030, Peoples R China
2.Jilin Acad Agr Sci, Changchun 130033, Peoples R China
3.Natl Engn Res Ctr Soybean, Changchun 130033, Peoples R China
关键词: Soybean;Cytoplasmic male sterility;Sterile line;Maintainer line;Molecular marker
期刊名称:PLANT SCIENCE ( 影响因子:4.729; 五年影响因子:5.132 )
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收录情况: SCI
摘要: The RN-type cytoplasmic male sterility (CMS) system used to develop Hybsoy-1, the first commercial hybrid soybean, has been subsequently applied to generate nearly all released soybean hybrids. Although more than 3 years are needed to classify sterile (S) and normal male-fertile (F) cytoplasms by conventional crossing, such classifications can be performed rapidly using organellar DNA-based molecular markers. Except for fertility, the agronomic traits of CMS hybrid soybean sterile and maintainer lines are identical. Consequently, it is difficult to distinguish them by routine visual inspection in the mixture arising in the course of field planting and harvesting during breeding. In this study, we performed next-generation sequencing of chloroplast DNAs of F- and S-cytoplasmic soybeans, assembled and annotated the genomes, and identified polymorphisms distinguishing them. Chloroplast DNAs of F and S cytoplasms were very similar in size (152,215 and 152,222 base pairs) and GC contents (35.37%). Among 23 shared SNPs in gene coding regions, we identified four that could be used in conjunction with restriction endonucleases to distinguish S and F cytoplasms. Although CMS is likely associated with mitochondrial DNA, maternal transmission of mitochondrial and chloroplast DNAs allows polymorphisms in either genome to be used to classify soybean cytoplasms, aiding hybrid soybean cultivar development. (C) 2014 Elsevier Ireland Ltd. All rights reserved.
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