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| DOI | 10.1016/j.pld.2024.03.0062468-2659 |
| Conservation genomics provides insights into genetic resilience and adaptation of the endangered Chinese hazelnut, Corylus chinensis | |
| 发表日期 | 2024 |
| ISSN | 2096-2703 |
| EISSN | 2468-2659 |
| 起始页码 | 46 |
| 结束页码 | 3 |
| 卷号 | 46期号:3 |
| 英文摘要 | Global climate change has increased concerns regarding biodiversity loss. However, many key conservation issues still required further research, including demographic history, deleterious mutation load, adaptive evolution, and putative introgression. Here we generated the first chromosome-level genome of the endangered Chinese hazelnut, Corylus chinensis , and compared the genomic signatures with its sympatric widespread C. kwechowensis-C. yunnanensis complex. We found large genome rearrangements across all Corylus species and identi fied species-speci fic expanded gene families that may be involved in adaptation. Population genomics revealed that both C . chinensis and the C. kwechowensis - C. yunnanensis complex had diverged into two genetic lineages, forming a consistent pattern of southwestern-northern differentiation. Population size of the narrow southwestern lineages of both species have decreased continuously since the late Miocene, whereas the widespread northern lineages have remained stable ( C . chinensis ) or have even recovered from population bottlenecks ( C. kwechowensis - C. yunnanensis complex) during the Quaternary. Compared with C. kwechowensis-C. yunnanensis complex, C . chinensis showed signi ficantly lower genomic diversity and higher inbreeding level. However, C . chinensis carried signi ficantly fewer deleterious mutations than C. kwechowensis-C. yunnanensis complex, as more effective purging selection reduced the accumulation of homozygous variants. We also detected signals of positive selection and adaptive introgression in different lineages, which facilitated the accumulation of favorable variants and formation of local adaptation. Hence, both types of selection and exogenous introgression could have mitigated inbreeding and facilitated survival and persistence of C . chinensis . Overall, our study provides critical insights into lineage differentiation, local adaptation, and the potential for future recovery of endangered trees. Copyright (c) 2024 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| 英文关键词 | Conservation genomics; Demographic history; Inbreeding; Genetic load; Runs of homozygosity; Local adaptation |
| 语种 | 英语 |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| WOS记录号 | WOS:001229580100001 |
| 来源期刊 | PLANT DIVERSITY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/303705 |
| 作者单位 | Chinese Academy of Forestry; Research Institute of Forestry, CAF; China Three Gorges Corporation; China Three Gorges Corporation |
| 推荐引用方式 GB/T 7714 | . Conservation genomics provides insights into genetic resilience and adaptation of the endangered Chinese hazelnut, Corylus chinensis[J],2024,46(3). |
| APA | (2024).Conservation genomics provides insights into genetic resilience and adaptation of the endangered Chinese hazelnut, Corylus chinensis.PLANT DIVERSITY,46(3). |
| MLA | "Conservation genomics provides insights into genetic resilience and adaptation of the endangered Chinese hazelnut, Corylus chinensis".PLANT DIVERSITY 46.3(2024). |
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