杂交产生了一个有希望的怪物：一种雌雄同体的自交慈鲷。

Hybridization generates a hopeful monster: a hermaphroditic selfing cichlid.

机构信息

School of Biological, Biomedical and Environmental Sciences, University of Hull, Hull, UK; Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, Gothenburg 405 30, Sweden.

School of Biological, Biomedical and Environmental Sciences , University of Hull , Hull , UK.

出版信息

R Soc Open Sci. 2016 Mar 23;3(3):150684. doi: 10.1098/rsos.150684. eCollection 2016 Mar.

DOI:10.1098/rsos.150684

PMID:27069660

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4821271/

Abstract

Compared with other phylogenetic groups, self-fertilization (selfing) is exceedingly rare in vertebrates and is known to occur only in one small clade of fishes. Here we report observing one F1-hybrid individual that developed into a functional hermaphrodite after crossing two closely-related sexually reproducing species of cichlids. Microsatellite alleles segregated consistent with selfing and Mendelian inheritance and we could rule out different modes of parthenogenesis including automixis. We discuss why selfing is not more commonly observed in vertebrates in nature, and the role of hybridization in the evolution of novel traits.

摘要

与其他系统发育群相比，脊椎动物的自体受精（自交）极为罕见，已知仅发生在一小部分鱼类中。在这里，我们报告观察到一个 F1 杂种个体，它在两个密切相关的性繁殖慈鲷物种杂交后发育成一个功能性雌雄同体。微卫星等位基因的分离符合自交和孟德尔遗传，我们可以排除不同的孤雌生殖模式，包括自体受精。我们讨论了为什么在自然界中，自交在脊椎动物中不更常见，以及杂交在新特征进化中的作用。