精液基因表达的演变和Drosophila的后交配生殖隔离
Carolina Flacchi1, Nicole Capri1, Alberto Civetta1
1Department of Biology, University of Winnipeg, Winnipeg, Canada.
Evolution; international journal of organic evolution
|February 28, 2024
概括
精液蛋白 (Sfp) 基因表达迅速进化,是由性选择驱动的,而不是放松的约束. 在Sfp表达的变化有助于物种之间的繁殖隔离.
科学领域:
- 进化遗传学的进化遗传学
- 分子进化是分子进化的过程.
- 生殖生物学 生殖生物学
背景情况:
- 精液蛋白 (Sfp) 基因表现出快速序列分歧,通常与性选择或冲突有关.
- 替代解释,如放松的选择性约束,被提出为快速演变的Sfp基因与性别有限的表达.
- 在Sfp基因中差异性表达水平的演变仍然不太了解.
研究的目的:
- 研究多态性和Sfp基因表达在Drosophila melanogaster和Drosophila simulans之间的差异.
- 确定选择对Sfp基因表达演化的影响.
- 评估Sfp基因表达的变化是否有助于生殖隔离.
主要方法:
- 对Sfp基因表达多态性和D. melanogaster和D. simulans之间的差异进行比较分析.
- 识别作用于Sfp基因表达的选择模式 (定向,稳定,放松).
- 对特定的Sfp基因进行实验性淘汰,以评估它们对生殖隔离的影响.
主要成果:
- 与其他男性生殖腺基因相比,Sfp基因显示出更高的表达分歧,但不显示出更高的多态性.
- 生殖组织特定的Sfp基因被丰富为定向和稳定选择.
- 放松选择主要用于具有非繁殖或非组织特异性表达的Sfp基因.
- 单个Sfp基因的淘汰并没有破坏交配后的生殖隔离障碍.
结论:
- 在男性生殖组织中Sfp基因表达是选择的重要目标.
- Sfp基因表达的进化是复杂的,涉及后交性选择.
- 单个Sfp基因表达的变化可能不足以引起物种化,但有助于繁殖隔离.
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