Both nuclear and cytoplasmic polymorphisms are involved in genetic conflicts over male fertility in the gynodioecious snail, Physa acuta.

IF 3.1 2区 环境科学与生态学 Q2 ECOLOGY
Evolution Pub Date : 2024-07-01 DOI:10.1093/evolut/qpae053
Fanny Laugier, Nathanaëlle Saclier, Kévin Béthune, Axelle Braun, Lara Konecny, Tristan Lefébure, Emilien Luquet, Sandrine Plénet, Jonathan Romiguier, Patrice David
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引用次数: 0

Abstract

Gynodioecy, the coexistence of hermaphrodites with females, often reflects conflicts between cytoplasmic male sterility (CMS) genes and nuclear genes restoring male fertility. CMS is frequent in plants and has been recently discovered in one animal: the freshwater snail, Physa acuta. In this system, CMS was linked to a single divergent mitochondrial genome (D), devoid of apparent nuclear restoration. Our study uncovers a second, novel CMS-associated mitogenome (K) in Physa acuta, demonstrating an extraordinary acceleration of molecular evolution throughout the entire K mitochondrial genome, akin to the previously observed pattern in D. This suggests a pervasive occurrence of accelerated evolution in both CMS-associated lineages. Through a 17-generation introgression experiment, we further show that nuclear polymorphisms in K-mitogenome individuals contribute to the restoration of male function in natural populations. Our results underscore shared characteristics in gynodioecy between plants and animals, emphasizing the presence of multiple CMS mitotypes and cytonuclear conflicts. This reaffirms the pivotal role of mitochondria in influencing male function and in generating genomic conflicts that impact reproductive processes in animals.

雌雄异体蜗牛Physa acuta的雄性生殖力遗传冲突涉及核多态性和细胞质多态性。
雌雄同体,即雌雄同体与雌性共存,往往反映了细胞质雄性不育(CMS)基因与恢复雄性生育能力的核基因之间的冲突。细胞质雄性不育基因在植物中很常见,最近在一种动物中也被发现:淡水蜗牛Physa acuta。在这个系统中,CMS 与单一的线粒体基因组(D)分化有关,没有明显的核恢复。我们的研究发现了阿库塔蜗牛的第二个新的 CMS 相关有丝分裂基因组(K),表明整个 K 线粒体基因组的分子进化异常加速,这与之前在 D 中观察到的模式类似。通过 17 代引种实验,我们进一步发现 K 线粒体基因组个体的核多态性有助于雄性功能在自然种群中的恢复。我们的研究结果强调了动植物雌雄同体的共同特征,强调了多种 CMS 有丝分裂型和细胞核冲突的存在。这再次证实了线粒体在影响雄性功能和产生影响动物生殖过程的基因组冲突方面的关键作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Evolution
Evolution 环境科学-进化生物学
CiteScore
5.00
自引率
9.10%
发文量
0
审稿时长
3-6 weeks
期刊介绍: Evolution, published for the Society for the Study of Evolution, is the premier publication devoted to the study of organic evolution and the integration of the various fields of science concerned with evolution. The journal presents significant and original results that extend our understanding of evolutionary phenomena and processes.
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