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脂肪酸代谢下降,而在布朗老鼠扩散到南方的性选择增加
Yao-Hua Zhang1, Lei Zhao1,2, Ming-Yu Zhang1,2
1State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture, Institute of Zoology, Chinese Academy of Sciences, Beichen West Road 1-5, Chaoyang District, Beijing 100101, China.
iScience
|September 21, 2023
概括
棕色的老鼠 棕色的大鼠
科学领域:
- 基因组学和进化生物学
- 动物生理学和动物行为.
背景情况:
- 棕色老鼠 (Rattus norvegicus) 起源于中国东北部,已成为全球性的害虫.
- 适应更温暖的气候是寒冷适应哺乳动物向南入侵的关键.
研究的目的:
- 研究棕色老鼠亚种R. n. humiliatus (RNH) 在从寒冷环境入侵到温暖环境时的遗传和生理适应.
- 了解温度,基因流动和选择在亚种分化中的作用.
主要方法:
- 对RNH和R. n. caraco (RNC) 进行了基因组和转录组分析.
- 进行了与脂肪酸代谢和激素相关的基因表达的比较分析.
- 行为实验评估了与费罗蒙信号和遗传差异相关的交配偏好.
主要成果:
- 亚种的分化是由温度驱动的,但受到基因流动的阻碍,脂肪酸代谢基因受到强烈的选择.
- 与RNC相比,RNH表现出低调的脂肪酸代谢肝脏基因和高调的费洛蒙基因.
- RNH显示对伴侣的偏好具有更强的费洛蒙信号和更大的遗传差异.
结论:
- 通过减少脂肪利用和增加依赖费洛蒙介导的性选择,RNH适应了更温暖的南方环境.
- 这些适应促进了从其寒冷的北方起源成功入侵温暖的地区.
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