气候变化领域集成服务门户(CCPortal): Gradual evolution of allopolyploidy in Arabidopsis suecica

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DOI	10.1038/s41559-021-01525-w
	Gradual evolution of allopolyploidy in Arabidopsis suecica
	Burns R.; Mandáková T.; Gunis J.; Soto-Jiménez L.M.; Liu C.; Lysak M.A.; Novikova P.Y.; Nordborg M.
发表日期	2021
ISSN	2397-334X
起始页码	1367
结束页码	1381
卷号	5 期号:10
英文摘要	Most diploid organisms have polyploid ancestors. The evolutionary process of polyploidization is poorly understood but has frequently been conjectured to involve some form of ‘genome shock’, such as genome reorganization and subgenome expression dominance. Here we study polyploidization in Arabidopsis suecica, a post-glacial allopolyploid species formed via hybridization of Arabidopsis thaliana and Arabidopsis arenosa. We generated a chromosome-level genome assembly of A. suecica and complemented it with polymorphism and transcriptome data from all species. Despite a divergence around 6 million years ago (Ma) between the ancestral species and differences in their genome composition, we see no evidence of a genome shock: the A. suecica genome is colinear with the ancestral genomes; there is no subgenome dominance in expression; and transposon dynamics appear stable. However, we find changes suggesting gradual adaptation to polyploidy. In particular, the A. thaliana subgenome shows upregulation of meiosis-related genes, possibly to prevent aneuploidy and undesirable homeologous exchanges that are observed in synthetic A. suecica, and the A. arenosa subgenome shows upregulation of cyto-nuclear processes, possibly in response to the new cytoplasmic environment of A. suecica, with plastids maternally inherited from A. thaliana. These changes are not seen in synthetic hybrids, and thus are likely to represent subsequent evolution. ? 2021, The Author(s).
语种	英语
scopus关键词	Arabidopsis; diploidy; genetics; human; hybridization; plant genome; polyploidy; Arabidopsis; Diploidy; Genome, Plant; Humans; Hybridization, Genetic; Polyploidy
来源期刊	Nature Ecology & Evolution
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/256854
作者单位	Gregor Mendel Institute, Austrian Academy of Sciences, Vienna BioCenter, Vienna, Austria; CEITEC - Central European Institute of Technology, and Faculty of Science, Masaryk University, Brno, Czech Republic; Institute of Biology, University of Hohenheim, Stuttgart, Germany; VIB-UGent Center for Plant Systems Biology, Ghent, Belgium; Department of Chromosome Biology, Max Planck Institute for Plant Breeding Research, Cologne, Germany
推荐引用方式 GB/T 7714	Burns R.,Mandáková T.,Gunis J.,et al. Gradual evolution of allopolyploidy in Arabidopsis suecica[J],2021,5(10).
APA	Burns R..,Mandáková T..,Gunis J..,Soto-Jiménez L.M..,Liu C..,...&Nordborg M..(2021).Gradual evolution of allopolyploidy in Arabidopsis suecica.Nature Ecology & Evolution,5(10).
MLA	Burns R.,et al."Gradual evolution of allopolyploidy in Arabidopsis suecica".Nature Ecology & Evolution 5.10(2021).