山鸡遗传分化背后的环境驱动因素(Poecile gambeli)。

IF 2.3 3区 生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Genome Pub Date : 2024-02-01 Epub Date: 2023-11-03 DOI:10.1139/gen-2023-0067
P Srikanthan, T M Burg
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引用次数: 0

摘要

人为气候变化对野生动物种群产生了巨大影响,影响的规模一直在增加。在这项研究中,我们利用3dRAD序列数据调查了北美12个山雀科山雀种群之间的遗传差异,并确定了遗传分化的环境驱动因素。为了检验整个范围内的遗传变异模式,我们进行了主成分判别分析(DAPC)、混合分析和计算的成对Fst值。DAPC揭示了四个集群:加利福尼亚州南部、落基山脉东部、落基山西北部和俄勒冈州/加利福尼亚州北部。然后,我们使用贝叶斯环境变量来突出与五个环境变量相关的显著异常SNP。我们鉴定了150多个与异常SNPs相关的基因,这些基因与15多种途径相关,包括应激反应和昼夜节律。我们还发现,通过距离和当地温度隔离的强烈信号与遗传距离高度相关。Maxent模拟显示,在未来50年里,范围向北移动,合适的栖息地减少,这突出了立即采取保护行动的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Environmental drivers behind the genetic differentiation in mountain chickadees (Poecile gambeli).

Anthropogenic climate change has a large impact on wildlife populations and the scale of the impacts has been increasing. In this study, we utilised 3dRAD sequence data to investigate genetic divergence and identify the environmental drivers of genetic differentiation between 12 populations of mountain chickadees, family Paridae, sampled across North America. To examine patterns of genetic variation across the range, we conducted a discriminant analysis of principal components (DAPC), admixture analysis, and calculated pairwise Fst values. The DAPC revealed four clusters: southern California, eastern Rocky Mountains, northwestern Rocky Mountains, and Oregon/northern California. We then used BayeScEnv to highlight significant outlier SNPs associated with the five environmental variables. We identified over 150 genes linked to outlier SNPs associated with more than 15 pathways, including stress response and circadian rhythm. We also found a strong signal of isolation by distance and local temperature was highly correlated with genetic distance. Maxent simulations showed a northward range shift over the next 50 years and a decrease in suitable habitat, highlighting the need for immediate conservation action.

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来源期刊
Genome
Genome 生物-生物工程与应用微生物
CiteScore
5.30
自引率
3.20%
发文量
42
审稿时长
6-12 weeks
期刊介绍: Genome is a monthly journal, established in 1959, that publishes original research articles, reviews, mini-reviews, current opinions, and commentaries. Areas of interest include general genetics and genomics, cytogenetics, molecular and evolutionary genetics, developmental genetics, population genetics, phylogenomics, molecular identification, as well as emerging areas such as ecological, comparative, and functional genomics.
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