Genetic and morphological divergence between Littorina fabalis ecotypes in Northern Europe

Show full item record



Permalink

http://hdl.handle.net/10138/326981

Citation

Galindo , J , Carvalho , J , Sotelo , G , Duvetorp , M , Costa , D , Kemppainen , P , Panova , M , Kaliontzopoulou , A , Johannesson , K & Faria , R 2021 , ' Genetic and morphological divergence between Littorina fabalis ecotypes in Northern Europe ' , Journal of Evolutionary Biology , vol. 34 , no. 1 , pp. 97–113 . https://doi.org/10.1111/jeb.13705

Title: Genetic and morphological divergence between Littorina fabalis ecotypes in Northern Europe
Author: Galindo, Juan; Carvalho, Joao; Sotelo, Graciela; Duvetorp, Marten; Costa, Diana; Kemppainen, Petri; Panova, Marina; Kaliontzopoulou, Antigoni; Johannesson, Kerstin; Faria, Rui
Contributor: University of Helsinki, Ecological Genetics Research Unit
Date: 2021-01
Language: eng
Number of pages: 17
Belongs to series: Journal of Evolutionary Biology
ISSN: 1010-061X
URI: http://hdl.handle.net/10138/326981
Abstract: Low dispersal marine intertidal species facing strong divergent selective pressures associated with steep environmental gradients have a great potential to inform us about local adaptation and reproductive isolation. Among these, gastropods of the genus Littorina offer a unique system to study parallel phenotypic divergence resulting from adaptation to different habitats related with wave exposure. In this study, we focused on two Littorina fabalis ecotypes from Northern European shores and compared patterns of habitat-related phenotypic and genetic divergence across three different geographic levels (local, regional and global). Geometric morphometric analyses revealed that individuals from habitats moderately exposed to waves usually present a larger shell size with a wider aperture than those from sheltered habitats. The phenotypic clustering of L. fabalis by habitat across most locations (mainly in terms of shell size) support an important role of ecology in morphological divergence. A genome scan based on amplified fragment length polymorphisms (AFLPs) revealed a heterogeneous pattern of differentiation across the genome between populations from the two different habitats, suggesting ecotype divergence in the presence of gene flow. The contrasting patterns of genetic structure between nonoutlier and outlier loci, and the decreased sharing of outlier loci with geographic distance among locations are compatible with parallel evolution of phenotypic divergence, with an important contribution of gene flow and/or ancestral variation. In the future, model-based inference studies based on sequence data across the entire genome will help unravelling these evolutionary hypotheses, improving our knowledge about adaptation and its influence on diversification within the marine realm.
Subject: adaptation
AFLPs
divergent natural selection
ecological speciation
flat periwinkles
gene flow
geometrics&#8211
morphometrics
parallel evolution
shell morphology
REPRODUCTIVE ISOLATION
ECOLOGICAL SPECIATION
POPULATION-STRUCTURE
PARALLEL EVOLUTION
ALLOZYME VARIATION
INTERTIDAL SNAIL
LOCAL ADAPTATION
GENOME-SCAN
MARINE
DIFFERENTIATION
1181 Ecology, evolutionary biology
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Galindo_Genetic ... ween_Littorina_fabalis.pdf 1.339Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record