亚热带森林中一种濒危树种的品系分化和基因组脆弱性

IF 3.5 2区 生物学 Q1 EVOLUTIONARY BIOLOGY
Xian-Liang Zhu, Jing Wang, Hong-Feng Chen, Ming Kang
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引用次数: 0

摘要

东亚的亚热带森林以其高度的植物多样性而闻名,尤其是丰富的古老孑遗物种。然而,这些孑遗物种的进化历史及其面对即将到来的气候变化的恢复能力仍不清楚。利用全基因组重测序数据,我们研究了濒危孑遗树种--中华缅茄(Akaniaceae)的世系分化和人口历史。我们采用了种群基因组学和景观基因组学相结合的方法来评估突变负荷和基因组偏移的变化,旨在预测不同种群如何应对气候变化。我们的分析表明,东西两系之间的基因组差异很大,这可能是冰川期气候波动造成的反复瓶颈所致。此外,我们还发现了几个可能与生长特性和缺氧反应有关的基因,这些基因在品系分化过程中受到了正向选择。我们对基因组脆弱性的评估发现,与核心种群相比,中华白海豚边缘种群的突变负荷和基因组偏移量明显更高。这意味着边缘种群可能会受到预测气候条件的最大影响。总之,我们的研究揭示了中华鳖历史上的种系分化和当代基因组的脆弱性。拓宽我们对中华白喉等孑遗和濒危物种的物种分化历史和未来恢复能力的认识,对于制定有效的保护策略以应对未来气候变化至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Lineage Differentiation and Genomic Vulnerability in a Relict Tree From Subtropical Forests

Lineage Differentiation and Genomic Vulnerability in a Relict Tree From Subtropical Forests

The subtropical forests of East Asia are renowned for their high plant diversity, particularly the abundance of ancient relict species. However, both the evolutionary history of these relict species and their capacity for resilience in the face of impending climatic changes remain unclear. Using whole-genome resequencing data, we investigated the lineage differentiation and demographic history of the relict and endangered tree, Bretschneidera sinensis (Akaniaceae). We employed a combination of population genomic and landscape genomic approaches to evaluate variation in mutation load and genomic offset, aiming to predict how different populations may respond to climate change. Our analysis revealed a profound genomic divergence between the East and West lineages, likely as the result of recurrent bottlenecks due to climatic fluctuations during the glacial period. Furthermore, we identified several genes potentially linked to growth characteristics and hypoxia response that had been subjected to positive selection during the lineage differentiation. Our assessment of genomic vulnerability uncovered a significantly higher mutation load and genomic offset in the edge populations of B. sinensis compared to their core counterparts. This implies that the edge populations are likely to experience the most significant impact from the predicted climate conditions. Overall, our research sheds light on the historical lineage differentiation and contemporary genomic vulnerability of B. sinensis. Broadening our understanding of the speciation history and future resilience of relict and endangered species such as B. sinensis, is crucial in developing effective conservation strategies in anticipation of future climatic changes.

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来源期刊
Evolutionary Applications
Evolutionary Applications 生物-进化生物学
CiteScore
8.50
自引率
7.30%
发文量
175
审稿时长
6 months
期刊介绍: Evolutionary Applications is a fully peer reviewed open access journal. It publishes papers that utilize concepts from evolutionary biology to address biological questions of health, social and economic relevance. Papers are expected to employ evolutionary concepts or methods to make contributions to areas such as (but not limited to): medicine, agriculture, forestry, exploitation and management (fisheries and wildlife), aquaculture, conservation biology, environmental sciences (including climate change and invasion biology), microbiology, and toxicology. All taxonomic groups are covered from microbes, fungi, plants and animals. In order to better serve the community, we also now strongly encourage submissions of papers making use of modern molecular and genetic methods (population and functional genomics, transcriptomics, proteomics, epigenetics, quantitative genetics, association and linkage mapping) to address important questions in any of these disciplines and in an applied evolutionary framework. Theoretical, empirical, synthesis or perspective papers are welcome.
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