Taxonomic and population genetic re-interpretation of two color morphs of the decollate snail, Rumina decollata (Mollusca, Pulmonata) in southern France. | - CCMAR -

Journal Article

TitleTaxonomic and population genetic re-interpretation of two color morphs of the decollate snail, Rumina decollata (Mollusca, Pulmonata) in southern France.
Publication TypeJournal Article
AuthorsPrévot, V, Jordaens, K, Van Houtte, N, Sonet, G, Janssens, K, Castilho, R, Backeljau, T
Year of Publication2013
JournalGenetica
Volume141
Issue7-9
Date Published2013 Sep
Pagination281-92
ISSN1573-6857
KeywordsAlleles, Animals, Gene Frequency, Genetic Loci, Homozygote, Inbreeding, Isoenzymes, Microsatellite Repeats, Pigmentation, Polymorphism, Genetic, Population, Snails
Abstract

The hermaphroditic terrestrial snail Rumina decollata has a mixed breeding system with a high prevalence of self-fertilization. In the Montpellier area (France), the species is represented by a dark and a light color morph. Based on allozyme data, both morphs have been reported as single, homozygous multilocus genotypes (MLG), differing at 13 out of 26 loci, but still showing occasional hybridization. Recent DNA sequence data suggest that each morph is a different phylogenetic species. In order to further evaluate this new taxonomic interpretation, the present contribution explores to what extent populations or color morphs indeed consist of single or few MLG. As such it is shown that both morphs are not single, homozygous MLG, but instead reveal a considerable amount of allelic variation and substantial numbers of heterozygous microsatellite genotypes. This suggests that outcrossing may be more prevalent than previously reported. Nevertheless, both morphs maintain a diagnostic multimarker differentiation in the presence of outcrossing in sympatric conditions, implying that they may be interpreted as species under the biological species concept. Finally, our data challenge the idea that simultaneous hermaphrodites should be either strict selfers or strict outcrossers.

DOI10.1007/s10709-013-9727-4
Sapientia

http://www.ncbi.nlm.nih.gov/pubmed/23887892?dopt=Abstract

Alternate JournalGenetica
PubMed ID23887892
CCMAR Authors