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Evolution and Diversification of Kiwifruit Mitogenomes through Extensive Whole-Genome Rearrangement and Mosaic Loss of Intergenic Sequences in a Highly Variable Region

文献类型：期刊论文

作者Wang, Shuaibin2,3,4; Li, Dawei5; Yao, Xiaohong5; Song, Qingwei2,3,4; Wang, Zupeng5; Zhang, Qiong5; Zhong, Caihong5; Liu, Yifei1; Huang, Hongwen2,5
刊名GENOME BIOLOGY AND EVOLUTION
出版日期2019-04-01
卷号11期号:4页码:1192-1206
ISSN号1759-6653
关键词Actinidia asterids genomic rearrangement intracellular gene transfer mitochondrial evolution structural variation
DOI10.1093/gbe/evz063
英文摘要Angiosperm mitochondrial genomes (mitogenomes) are notable for their extreme diversity in both size and structure. However, our current understanding of this diversity is limited, and the underlying mechanism contributing to this diversity remains unclear. Here, we completely assembled and compared the mitogenomes of three kiwifruit (Actinidia) species, which represent an early divergent lineage in asterids. We found conserved gene content and fewer genomic repeats, particularly large repeats (> 1 kb), in the three mitogenomes. However, sequence transfers such as intracellular events are variable and dynamic, in which both ancestral shared and recently species-specific events as well as complicated transfers of two plastid-derived sequences into the nucleus through the mitogenomic bridge were detected. We identified extensive whole-genome rearrangements among kiwifruit mitogenomes and found a highly variable V region in which fragmentation and frequent mosaic loss of intergenic sequences occurred, resulting in greatly interspecific variations. One example is the fragmentation of the V region into two regions, V1 and V2, giving rise to the two mitochondrial chromosomes of Actinidia chinensis. Finally, we compared the kiwifruit mitogenomes with those of other asterids to characterize their overall mitogenomic diversity, which identified frequent gain/loss of genes/introns across lineages. In addition to repeat-mediated recombination and import-driven hypothesis of genome size expansion reported in previous studies, our results highlight a pattern of dynamic structural variation in plant mitogenomes through global genomic rearrangements and species-specific fragmentation and mosaic loss of intergenic sequences in highly variable regions on the basis of a relatively large ancestral mitogenome.
资助项目National Natural Science Foundation of China[31870198] ; National Natural Science Foundation of China[31770374] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2018376]
WOS研究方向Evolutionary Biology ; Genetics & Heredity
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000476569800016
源URL[http://202.127.146.157/handle/2RYDP1HH/8460]  
专题中国科学院武汉植物园
通讯作者Liu, Yifei; Huang, Hongwen
作者单位1.Hubei Univ Chinese Med, Coll Pharm, Wuhan, Hubei, Peoples R China
2.Chinese Acad Sci, South China Bot Garden, Key Lab Plant Resources Conservat & Sustainable U, Guangzhou, Guangdong, Peoples R China
3.Guangdong Prov Key Lab Appl Bot, Guangzhou, Guangdong, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Plant Germplasm Enhancement & Specially A, Wuhan, Hubei, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Shuaibin,Li, Dawei,Yao, Xiaohong,et al. Evolution and Diversification of Kiwifruit Mitogenomes through Extensive Whole-Genome Rearrangement and Mosaic Loss of Intergenic Sequences in a Highly Variable Region[J]. GENOME BIOLOGY AND EVOLUTION,2019,11(4):1192-1206.
APA Wang, Shuaibin.,Li, Dawei.,Yao, Xiaohong.,Song, Qingwei.,Wang, Zupeng.,...&Huang, Hongwen.(2019).Evolution and Diversification of Kiwifruit Mitogenomes through Extensive Whole-Genome Rearrangement and Mosaic Loss of Intergenic Sequences in a Highly Variable Region.GENOME BIOLOGY AND EVOLUTION,11(4),1192-1206.
MLA Wang, Shuaibin,et al."Evolution and Diversification of Kiwifruit Mitogenomes through Extensive Whole-Genome Rearrangement and Mosaic Loss of Intergenic Sequences in a Highly Variable Region".GENOME BIOLOGY AND EVOLUTION 11.4(2019):1192-1206.

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来源：武汉植物园

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