Sun skink landscape genomics: assessing the roles of micro-evolutionary processes in shaping genetic and phenotypic diversity across a heterogeneous and fragmented landscape

Molecular Ecology
Anthony J BarleyRafe M Brown

Abstract

Incorporating genomic data sets into landscape genetic analyses allows for powerful insights into population genetics, explicitly geographical correlates of selection, and morphological diversification of organisms across the geographical template. Here, we utilize an integrative approach to examine gene flow and detect selection, and we relate these processes to genetic and phenotypic population differentiation across South-East Asia in the common sun skink, Eutropis multifasciata. We quantify the relative effects of geographic and ecological isolation in this system and find elevated genetic differentiation between populations from island archipelagos compared to those on the adjacent South-East Asian continent, which is consistent with expectations concerning landscape fragmentation in island archipelagos. We also identify a pattern of isolation by distance, but find no substantial effect of ecological/environmental variables on genetic differentiation. To assess whether morphological conservatism in skinks may result from stabilizing selection on morphological traits, we perform FST -PST comparisons, but observe that results are highly dependent on the method of comparison. Taken together, this work provides novel insights ...Continue Reading

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Citations

Jan 13, 2016·Molecular Ecology·Jonathan L RichardsonStephen F Spear
Jul 28, 2016·Molecular Ecology Resources·Mercedes BurnsMarshal Hedin
Jul 20, 2016·Proceedings of the National Academy of Sciences of the United States of America·Kelly R ZamudioNicholas A Mason
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Jun 9, 2019·International Journal of Molecular Sciences·Maria M RomeirasMónica Moura
Aug 6, 2019·Ecology and Evolution·Alexander R KrohnErica Bree Rosenblum

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