Discovery of Four Novel ORFs Responsible for Cytoplasmic Male Sterility (CMS) in Cotton (Gossypium hirsutum L.) through Comparative Analysis of the Mitochondrial Genomes of Four Isoplasmic Lines
文献类型： 外文期刊
作者： Li, Min 1 ; Chen, Li 1 ; Tang, Danfeng 3 ; Liao, Xiaofang 4 ; Kong, Xiangjun 1 ; Li, Bin 1 ; You, Jingyi 1 ; Zhou, Ruiyan 1 ;
作者机构： 1.Guangxi Univ, Coll Agr, Key Lab Plant Genet & Breeding, Nanning 530007, Peoples R China
2.Guangxi Univ, Coll Agr, Natl Demonstrat Ctr Expt Plant Sci Educ, Nanning 530007, Peoples R China
3.Guangxi Bot Garden Med Plants, Guangxi Key Lab Med Resources Protect & Genet Imp, Nanning 530007, Peoples R China
4.Guangxi Acad Agr Sci, Cash Crop Res Inst, Nanning 530007, Peoples R China
关键词： cotton; cytoplasmic male sterility; mitochondrial genome; ORFs
期刊名称：AGRONOMY-BASEL （ 影响因子：3.417； 五年影响因子：3.64 ）
ISSN：
年卷期： 2020 年 10 卷 6 期
页码：
收录情况： SCI
摘要： Cytoplasmic male sterility (CMS) is an important feature for achieving heterosis in the development of hybrid crops. Mitochondria contribute to CMS, especially via mitochondrial DNA (mtDNA) rearrangements and chimeric genes. However, the mechanisms of CMS have not been fully elucidated, and the isonuclear alloplasmic lines used in previous studies have limited utility in cotton CMS research. In this study, three CMS lines (J4A-1, J4A-2 and J4A-3) and their isoplasmic maintainer line (J4B) were analyzed for mtDNA structural differences via high-throughput sequencing. The results showed that mtDNA was conserved (with similarities higher than 99%) among the three CMS lines and their isoplasmic maintainer line. All lines harbored 36 known protein-coding genes, 3 rRNAs, and 15 tRNAs. The protein-coding genes with non-synonymous mutations mainly encoded two types of proteins: ATPase and ribosomal proteins. Four new open reading frames (ORFs) (orf116b,orf186a-1,orf186a-2andorf305a) were identified as candidate ORFs responsible for CMS. Two of the ORFs (orf186a-1andorf186a-2) were identified asorf4andorf4-2of the upland cotton CMS line 2074A (a line withGossypiumharknessiiBrandegee CMS-D2-2 cytoplasm), respectively. These findings provide a reference for CMS research in cotton or other crops.
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