在平虫中对比结合前后的性选择的形式和强度
Lucas Marie-Orleach1,2,3, Matthew D Hall4, Lukas Schärer1
1Evolutionary Biology, Zoological Institute, University of Basel, Basel, Switzerland.
Evolution; international journal of organic evolution
|December 27, 2023
概括
性选择在交配阶段起作用,影响特征进化. 这项研究量化了平虫特征的性选择,揭示了选择强度和形式在不同的交配过程中如何变化.
科学领域:
- 进化生物学 进化生物学
- 性选择性选择性选择
- 动物行为 动物行为
背景情况:
- 性特征在选择下在多次交配期间 (交配前,交配期间,交配后) 演变.
- 在这些情节中量化选择是具有挑战性的,因为同时测量特征和健身组件是很困难的.
- 了解选择在各个情节中的强度和形式是如何变化的,对于解释性选择性特征的演变至关重要.
研究的目的:
- 在平虫Macrostomum lignano的不同交配期内量化性选择.
- 调查如何选择强度和形式变化跨前后合性健身组件.
- 在性选择过程中将特定的形态特征与健康成分联系起来.
主要方法:
- 使用了一种转基因 Macrostomum lignano 线,表达绿色光蛋白 (GFP),用于体内精子跟踪.
- 在焦点中评估了交配成功,精子转移效率和精子受精效率.
- 测量了焦点的13个形态特征,包括交配器官和精子形态.
主要成果:
- 鉴定了精子生产率 (交配前和后) 和交配器官形状 (受精效率) 的线性选择.
- 在配合器官和精子形态特征的组合上检测到非线性 (形) 选择,主要与精子转移和受精效率有关.
- 证明性选择的形式和强度在不同的健身组件和交配情节中各不相同.
结论:
- 性选择是一个动态的过程,选择压力在交配阶段和健康组件之间发生变化.
- 在各个情节中对性选择的细度量化提供了对性选择特征演变的洞察力.
- 这项研究强调了考虑性选择的多情节性质的重要性,以全面理解特征进化.
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