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通过寄生虫介导的选择维持宿主外交所需的高寄生虫毒性

Samuel P Slowinski¹, JaeHoon Cho², McKenna J Penley²

¹Department of Biology, University of Maryland, College Park, MD, United States.

Evolution letters

|December 4, 2023

概括

同进化的寄生虫可以防止自我受精入侵外交种群,但只有高度毒性菌株是有效的. 低毒性寄生虫无法停止自杀,影响宿主-寄生虫动态.

科学领域:

进化生物学是进化的生物学.
遗传学是一个遗传学.
微生物学微生物学

背景情况:

与单亲生殖相比,双亲生殖很常见,但成本高.
红皇后假设表明,共同进化的寄生虫通过防止无性或自我受精的血统入侵来维持性繁殖.
寄生虫毒性在维持外交中的作用尚未完全理解.

研究的目的:

为了调查寄生虫的毒性是否影响共进化的寄生虫的能力,以防止自我受精的入侵在外交宿主群体.
在不同水平的寄生虫毒性下测试红皇后假设.

主要方法:

使用野生类型的 *Caenorhabditis elegans* 两性化动物 (自我受精和外交) 引入 *C. elegans* 种群,具有义务外交突变.
暴露复制种群的四个菌株的 * Serratia marcescens * 寄生虫与不同的毒力.
实施了三种治疗方法:热杀死 (控制),固定的基因型 (不进化) 和共聚 (共进化) 寄生虫在24个宿主世代.

主要成果:

在控制和固定寄生虫治疗中,自受精成功入侵宿主种群,无论寄生虫的毒性如何.
在共同进化的寄生虫治疗中,自我侵袭的种群暴露在低到中等毒性菌株中.
在与高度毒性细菌菌株共同进化的宿主群体中,自我受精仍然很少发生.

结论:

只有高度有毒的共同进化的寄生虫才能有效地防止在外交宿主群体内自我受精的入侵.
寄生虫的毒性是红女王假设预测维持性繁殖的关键因素.

关键词:

红皇后假设红皇后假设共同进化的共同进化实验进化的实验进化.寄生虫寄生虫是一种寄生虫.在性爱中,性爱是性爱.毒性毒性是一种毒性.

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