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Evidence of introgressive hybridization between the morphologically divergent land snails Ainohelix and Ezohelix

Morii, Yuta; Yokoyama, Jun; Kawata, Masakado; Davison, Angus; Satoshi, Chiba

Authors

Yuta Morii

Jun Yokoyama

Masakado Kawata

ANGUS DAVISON angus.davison@nottingham.ac.uk
Associate Professor and Reader in Evolutionary Genetics

Chiba Satoshi



Abstract

Hybridization between different taxa is likely to take place when adaptive morphological differences evolve more rapidly than reproductive isolation. When studying the phylogenetic relationship between two land snails of different nominal genera, Ainohelix editha and Ezohelix gainesi, from Hokkaido, Japan, using nuclear internal transcribed spacer and mitochondrial 16S ribosomal DNA, we found a marked incongruence in the topology between nuclear and mitochondrial phylogenies. Furthermore, no clear association was found between shell morphology (which defines the taxonomy) and nuclear or mitochondrial trees and morphology of reproductive system. These patterns are most likely explained by historical introgressive hybridization between A. editha and E. gainesi. Because the shell morphologies of the two species are quite distinct, even when they coexist, the implication is that natural selection is able to maintain (or has recreated) distinct morphologies in the face of gene flow. Future studies may be able to reveal the regions of the genome that maintain the morphological differences between these species.

Citation

Morii, Y., Yokoyama, J., Kawata, M., Davison, A., & Satoshi, C. (2015). Evidence of introgressive hybridization between the morphologically divergent land snails Ainohelix and Ezohelix. Biological Journal of the Linnean Society, 115(1), https://doi.org/10.1111/bij.12466

Journal Article Type Article
Acceptance Date Nov 30, 2014
Online Publication Date Feb 12, 2015
Publication Date May 1, 2015
Deposit Date Jun 21, 2016
Publicly Available Date Jun 21, 2016
Journal Biological Journal of the Linnean Society
Print ISSN 0024-4066
Electronic ISSN 1095-8312
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 115
Issue 1
DOI https://doi.org/10.1111/bij.12466
Keywords ancestral, ancestral hybridization, Bradybaenidae, phenotypic evolution, phylogeny, speciation
Public URL http://eprints.nottingham.ac.uk/id/eprint/34169
Publisher URL http://onlinelibrary.wiley.com/doi/10.1111/bij.12466/abstract
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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