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Adaptive Divergence in Moor Frog (Rana Arvalis) Populations Along an Acidification Gradient: Inferences from QST-FST Correlations
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Populationsbiologi och naturvårdsbiologi.
2012 (Engelska)Ingår i: Evolution, ISSN 0014-3820, E-ISSN 1558-5646, Vol. 66, nr 3, s. 867-881Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Microevolutionary responses to spatial variation in the environment seem ubiquitous, but the relative role of selection and neutral processes in driving phenotypic diversification remain often unknown. The moor frog (Rana arvalis) shows strong phenotypic divergence along an acidification gradient in Sweden. We here used correlations among population pairwise estimates of quantitative trait (PST or QST from common garden estimates of embryonic acid tolerance and larval life-history traits) and neutral genetic divergence (FST from neutral microsatellite markers), as well as environmental differences (pond pH, predator density, and latitude), to test whether this phenotypic divergence is more likely due to divergent selection or neutral processes. We found that trait divergence was more strongly correlated with environmental differences than the neutral marker divergence, suggesting that divergent natural selection has driven phenotypic divergence along the acidification gradient. Moreover, pairwise PSTs of embryonic acid tolerance and QSTs of metamorphic size were strongly correlated with breeding pond pH, whereas pairwise QSTs of larval period and growth rate were more strongly correlated with geographic distance/latitude and predator density, respectively. We suggest that incorporating measurements of environmental variation into QSTFST studies can improve our inferential power about the agents of natural selection in natural populations.

Ort, förlag, år, upplaga, sidor
2012. Vol. 66, nr 3, s. 867-881
Nyckelord [en]
Acid stress, adaptive divergence, amphibians, environmental gradient, environmental stress, QST-FST comparisons
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
URN: urn:nbn:se:uu:diva-174208DOI: 10.1111/j.1558-5646.2011.01472.xISI: 000300931400019OAI: oai:DiVA.org:uu-174208DiVA, id: diva2:526805
Tillgänglig från: 2012-05-15 Skapad: 2012-05-14 Senast uppdaterad: 2017-12-07Bibliografiskt granskad

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