Single-gene speciation: mating and gene flow between mirror-image snails

Richards, Paul M. and Morii, Yuta and Kimura, Kazuki and Hirano, Takahiro and Chiba, Satoshi and Davison, Angus (2017) Single-gene speciation: mating and gene flow between mirror-image snails. Evolution Letters, 1 (6). pp. 282-291. ISSN 2056-3744

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Available under Licence Creative Commons Attribution.
Download (611kB) | Preview

Abstract

Variation in the shell coiling, or chirality, of land snails provides an opportunity to investigate the potential for “single-gene” speciation, because mating between individuals of opposite chirality is believed not possible if the snails mate in a face-to-face position. However, the evidence in support of single-gene speciation is sparse, mostly based upon single-gene mitochondrial studies and patterns of chiral variation between species. Previously, we used a theoretical model to show that as the chiral phenotype of offspring is determined by the maternal genotype, occasional chiral reversals may take place and enable gene flow between mirror image morphs, preventing speciation. Here, we show empirically that there is recent or ongoing gene flow between the different chiral types of Japanese Euhadra species. We also report evidence of mating between mirror-image morphs, directly showing the potential for gene flow. Thus, theoretical models are suggestive of gene flow between oppositely coiled snails, and our empirical study shows that they can mate and that there is gene flow in Euhadra. More than a single gene is required before chiral variation in shell coiling can be considered to have created a new species.

Item Type: Article
Keywords: behavioral genetics; evolutionary genomics
Schools/Departments: University of Nottingham, UK > Faculty of Medicine and Health Sciences > School of Life Sciences
Identification Number: https://doi.org/10.1002/evl3.31
Depositing User: Eprints, Support
Date Deposited: 13 Dec 2017 08:58
Last Modified: 02 Jul 2018 09:17
URI: http://eprints.nottingham.ac.uk/id/eprint/48714

Actions (Archive Staff Only)

Edit View Edit View