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抑制一个自私的遗传元素增加了雄性在中的交配成功
Sophie Lyth1, Andrea J Betancourt1, Tom A R Price1
1Institute of Infection Veterinary and Ecological Sciences, University of Liverpool Liverpool UK.
Ecology and evolution
|November 15, 2023
概括
果中的X染色体介质驱动 (XCMD) 表明被抑制的雄性具有更高的交配成功率. 不被抑制的雄性减少了后代,但XCMD的传播仍然不清楚.
科学领域:
- 进化遗传学的进化遗传学
- 人口遗传学 人口遗传学
- 行为生态学 行为生态学
背景情况:
- X染色体介质驱动 (XCMD) 通过消除携带Y的精子来偏向遗传.
- XCMD系统通常在低频率下持续存在,这表明健身成本或抵消遗传因素.
- 携带XCMD或其抑制剂的男性的交配成功程度尚不清楚.
研究的目的:
- 研究XCMD雄性和抑制的XCMD雄性与*Drosophila subobscura*中的野生型雄性相比的交配能力.
- 为了确定XCMD的遗传抑制剂是否会影响雄性交配的成功.
- 探索限制XCMD在自然种群中传播的因素.
主要方法:
- 竞争性和非竞争性交配试验是在Drosophila subobscura中进行的.
- 对野生型,未被抑制的XCMD和被抑制的XCMD雄性进行了评估.
- 对于未被抑制的XCMD雄性,量化了后代产量.
主要成果:
- 不被抑制的XCMD雄性在交配试验中没有表现出任何歧视.
- 没有被抑制的XCMD雄性比野生型雄性下降12%的后代产量.
- 被抑制的XCMD雄性比野生类型对照表现出明显更高的交配成功.
结论:
- 在未被抑制的XCMD雄性中,减少后代的产生不足以解释它们的低频率.
- 被抑制的XCMD雄性具有增强的交配成功,这是以前没有考虑的因素.
- 在*Drosophila subobscura*中XCMD的稳定低频率需要进一步的研究,而不仅仅是直接的男性健身成本.
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