在人口间杂交物中,线核对性别比例的影响在几代人之间持续存在
Suzanne Edmands1, Jacob R Denova1, Ben A Flanagan1
1Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States.
Journal of evolutionary biology
|September 26, 2024
概括
性别特定的线粒细胞协调会影响足动物的性别比率,即使在复杂的杂交世代中也会持续存在. 这些发现强调了线粒体和核基因相互作用在进化过程中的重要作用.
科学领域:
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
- 生态生态学 生态生态学
背景情况:
- 细胞的能量生产依赖于协调的核和线粒体基因产物.
- 由于雄性和雌性之间有不同的能量策略,最佳的线粒核协调可能是性别特异的.
- 之前的研究表明,Tigriopus californicus的性别特异性线核效应,但另一个假设提出了父母核等位基源作为驱动因素.
研究的目的:
- 为了测试另一种假设,即父母核等位基源,而不是性别特异的线核效应,驱动了先前观察到的模式.
- 通过F1杂交物来调查F2杂交物中线核效应的持久性,这些杂交物通过F1杂交物从父母双方继承核基因.
主要方法:
- 扩展的互惠F1交叉到F2杂交在Tigriopus californicus的copepod.
- 分析了父母,F1和F2世代的性别比例,健康状况,线粒体DNA含量,常规代谢率和氧化DNA损伤.
- 在不同混合世代中比较表型特征,以评估线粒子核相互作用的影响.
主要成果:
- 证实了线粒子核对性别比例的影响,尽管F2混合体适应性降低了,但F1到F2世代的扭曲仍然存在.
- 对于其他测量的表型特征,没有观察到性别交叉相互作用.
- 发现女性的线粒体DNA含量更高,F2杂交体的常规代谢率和氧化DNA损伤较低.
结论:
- 性别特定的线粒子核效应是强大的,即使在F2杂交分解时也会持续存在,这强调了它们的意义.
- 这些持续的影响有助于维持群体内的线粒体DNA多态性.
- 这项研究提供了强有力的证据,证明性别特异性线粒细胞协调会影响关键的生物特征.
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