在热应激下选择性多阴性,以及交配系统中气候驱动的转变的进化潜力
Matilda Q R Pembury Smith1,2, Laura Latkova3, Rhonda R Snook3,4
1Department of Zoology, Stockholm University, Stockholm, Sweden. matilda.pembury.smith@zoologi.su.se.
Heredity
|September 17, 2025
概括
环境变化,如气温上升,可以导致男性不育,可能导致物种转向多夫多妻制 (多夫多妻制). 这项研究探讨了影响Drosophila subobscura耐热性和交配系统的遗传因素.
科学领域:
- 进化生物学 进化生物学
- 生态生态学 生态生态学
- 气候变化研究 气候变化研究
背景情况:
- 交配系统是由交配生态形成的,但对环境变化的影响尚不清楚.
- 升高的温度可以诱导男性不育,可能导致女性为了保证生育能力而进行再测试.
- 如果雌性只与不育的雄性交配,那么单类物种中因热引起的雄性不育会带来灭绝的风险.
研究的目的:
- 为了调查由热应激引起的男性不育是否可以在典型的单物种中驱动多.
- 检查基因变异是男性生育能力的基础,耐热压力和选择性多夫制.
- 评估不同交配系统在热应力下适应性的后果.
主要方法:
- 使用的是Drosophila subobscura的雌性线条,这是一个单的物种.
- 暴露于发育热应激的雄性,以诱导不育.
- 观察到女性的回行为,并评估生育敏感性和多夫多妻性可塑性的遗传变异.
主要成果:
- 热应激诱导了男性不育,导致女性重生.
- 在男性生育敏感性和女性在更高温度下生育方面存在显著的遗传变异.
- 在多合一的可塑性中发现了很少的遗传变异,这表明通过对多合一相关基因的选择会发生转变.
结论:
- 温度上升可能会通过热生态和性选择的相互作用改变物种的交配系统.
- 虽然多夫制可以改善与无菌雄性交配后的后代产量,但它不能完全恢复生殖产量,并增加女性死亡率.
- 对于男性生育弹性和多体性,存在进化潜力,但交配系统的变化更可能是由多体性基因的选择而不是可塑性驱动的.
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