GLOBAL ANALYSIS OF GENES INVOLVED IN FRESHWATER ADAPTATION IN THREESPINE STICKLEBACKS (GASTEROSTEUS ACULEATUS)
Open Access
- 11 February 2011
- journal article
- research article
- Published by Oxford University Press (OUP) in Evolution
- Vol. 65 (6) , 1800-1807
Abstract
Examples of parallel evolution of phenotypic traits have been repeatedly demonstrated in threespine sticklebacks (Gasterosteus aculeatus) across their global distribution. Using these as a model, we performed a targeted genome scan—focusing on physiologically important genes potentially related to freshwater adaptation—to identify genetic signatures of parallel physiological evolution on a global scale. To this end, 50 microsatellite loci, including 26 loci within or close to (EDA), showed signatures of selection in three or more locations. Hence, although these results give some evidence for consistent parallel molecular evolution in response to freshwater colonization, they suggest that different evolutionary pathways may underlie physiological adaptation to freshwater habitats within the global distribution of the threespine stickleback.Keywords
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