| Genomic basis of homoploid hybrid speciation within chestnut trees | |
Sun, Yongshuai1 ; Lu, Zhiqiang1; Zhu, Xingfu; Ma, Hui
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| 2020 | |
| Source Publication | NATURE COMMUNICATIONS
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| ISSN | 2041-1723 |
| Volume | 11Issue:1Pages:- |
| Abstract | Hybridization can drive speciation. We examine the hypothesis that Castanea henryi var. omeiensis is an evolutionary lineage that originated from hybridization between two nearsympatric diploid taxa, C. henryi var. henryi and C. mollissima. We produce a high-quality genome assembly for mollissima and characterize evolutionary relationships among related chestnut taxa. Our results show that C. henryi var. omeiensis has a mosaic genome but has accumulated divergence in all 12 chromosomes. We observe positive correlation between admixture proportions and recombination rates across the genome. Candidate barrier genomic regions, which isolate var. henryi and mollissima, are re-assorted in the hybrid lineage. We further find that the putative barrier segments concentrate in genomic regions with less recombination, suggesting that interaction between natural selection and recombination shapes the evolution of hybrid genomes during hybrid speciation. This study highlights that reassortment of parental barriers is an important mechanism in generating biodiversity. |
| Keyword | FLOWERING-TIME GENE FLOW INFERENCE ASSOCIATION POPULATIONS DIVERSITY EVOLUTION SELECTION CASTANEA HISTORY |
| Subject Area | Science & Technology - Other Topics |
| DOI | 10.1038/s41467-020-17111-w |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000550671200001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/11756 |
| Collection | 2012年后新成立研究组 植物进化生态研究组 |
| Affiliation | 1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, CAS Key Lab Trop Forest Ecol, Mengla 666303, Yunnan, Peoples R China 2.Chinese Acad Sci, Core Bot Gardens, Ctr Plant Ecol, Mengla 666303, Yunnan, Peoples R China |
| Recommended Citation GB/T 7714 | Sun, Yongshuai,Lu, Zhiqiang,Zhu, Xingfu,et al. Genomic basis of homoploid hybrid speciation within chestnut trees[J]. NATURE COMMUNICATIONS,2020,11(1):-. |
| APA | Sun, Yongshuai,Lu, Zhiqiang,Zhu, Xingfu,&Ma, Hui.(2020).Genomic basis of homoploid hybrid speciation within chestnut trees.NATURE COMMUNICATIONS,11(1),-. |
| MLA | Sun, Yongshuai,et al."Genomic basis of homoploid hybrid speciation within chestnut trees".NATURE COMMUNICATIONS 11.1(2020):-. |
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| Genomic basis of hom（1348KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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