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Evidence for the paternal mitochondrial DNA in the crucian carp-like fish lineage with hybrid origin

文献类型： 外文期刊

作者： Wang, Shi 1 ; Jiao, Ni 1 ; Zhao, Lu 1 ; Zhang, Meiwen 1 ; Zhou, Pei 1 ; Huang, Xuexue 1 ; Hu, Fangzhou 1 ; Yang, Conghui; 1 ;

作者机构： 1.Hunan Normal Univ, State Key Lab Dev Biol Freshwater Fish, Changsha 410081, Peoples R China

2.Hunan Normal Univ, Coll Life Sci, Changsha 410081, Peoples R China

3.Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Peoples R China

4.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Minist Agr, Key Lab Trop & Subtrop Fisheries Resource Applica, Guangzhou 510380, Peoples R China

关键词： hybridization; homodiploid; common carp; blunt snout bream; crucian carp; mitochondrial genome; genetic evolution

期刊名称：SCIENCE CHINA-LIFE SCIENCES （ 影响因子：6.038； 五年影响因子：4.754 ）

ISSN： 1674-7305

年卷期： 2020 年 63 卷 1 期

页码：

收录情况： SCI

摘要： In terms of taxonomic status, common carp (Cyprinus carpio, Cyprininae) and crucian carp (Carassius auratus, Cyprininae) are different species; however, in this study, a newborn homodiploid crucian carp-like fish (2n=100) (2nNCRC) lineage (F-1-F-3) was established from the interspecific hybridization of female common carp (2n=100)xmale blunt snout bream (Megalobrama amblycephala, Cultrinae, 2n=48). The phenotypes and genotypes of 2nNCRC differed from those of its parents but were closely related to those of the existing diploid crucian carp. We further sequenced the whole mitochondrial (mt) genomes of the 2nNCRC lineage from F-1 to F-3. The paternal mtDNA fragments were stably embedded in the mt-genomes of F-1-F-3 generations of 2nNCRC to form chimeric DNA fragments. Along with this chimeric process, numerous base sites of F-1-F-3 generations of 2nNCRC underwent mutations. Most of these mutation sites were consistent with the existing diploid crucian carp. Moreover, the mtDNA organization and nucleotide composition of 2nNCRC were more similar to those of the existing diploid crucian carp than those of the parents. The inheritable chimeric DNA fragments and mutant loci in the mt-genomes of different generations of 2nNCRC provided important evidence of the mtDNA change process in the newborn lineage derived from hybridization of different species. Our findings demonstrated for the first time that the paternal mtDNA were transmitted into the mt-genomes of homodiploid lineage, which provided new insights into the existence of paternal mtDNA in the mtDNA inheritance.

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