Genetic swamping of the critically endangered Scottish wildcat was recent and accelerated by disease

Genetic swamping of the critically endangered Scottish wildcat was recent and accelerated by disease
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极度濒危的苏格兰野猫的基因淹没最近才出现,并因疾病而加速

DOI:
10.1016/j.cub.2023.10.026
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发表时间:
2023
期刊:
影响因子:
9.2
通讯作者:
Howard-McCombe J
Howard-McCombe J
中科院分区:
生物学1区
文献类型:
--
作者:
Howard-McCombe J

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由于与引进的家猫杂交,苏格兰的欧洲野猫种群被认为是极度濒危的,尽管这种基因流动发生的时间框架尚不清楚。在这里,利用来自现代、博物馆和古代样本的基因组数据,我们重建了当地野猫种群从可存活到严重杂交的下降轨迹,并确定了时间。我们证明,尽管家猫在英国已经存在了2000多年,但杂交的开始只是最近70年的事情。我们的分析表明,现代野猫的家养祖先在基因组的许多部分都明显过度代表,包括主要组织相容性复合体(MHC)。我们假设,基因渐渗为野猫提供了保护,使其免受家猫携带和引入的疾病的侵害,而这种选择通过连锁阻力导致了不适应的遗传沼泽。以苏格兰野猫为例,我们证明了当地祖先估计对于了解野生种群杂交的影响和支持保护工作以减轻人为和环境变化的后果的重要性。
The European wildcat population in Scotland is considered critically endangered as a result of hybridization with introduced domestic cats,1,2though the time frame over which this gene flow has taken place is unknown. Here, using genome data from modern, museum, and ancient samples, we reconstructed the trajectory and dated the decline of the local wildcat population from viable to severely hybridized. We demonstrate that although domestic cats have been present in Britain for over 2,000 years,3the onset of hybridization was only within the last 70 years. Our analyses reveal that the domestic ancestry present in modern wildcats is markedly over-represented in many parts of the genome, including the major histocompatibility complex (MHC). We hypothesize that introgression provides wildcats with protection against diseases harbored and introduced by domestic cats, and that this selection contributes to maladaptive genetic swamping through linkage drag. Using the case of the Scottish wildcat, we demonstrate the importance of local ancestry estimates to both understand the impacts of hybridization in wild populations and support conservation efforts to mitigate the consequences of anthropogenic and environmental change.
DOI: 10.1038/nmeth.1923
发表时间: 2012-03-04
期刊: NATURE METHODS
影响因子: 48
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DOI: --
发表时间: 2021
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DOI: --
发表时间: 2014
期刊:
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