In addition, values of a trait are more dissimilar across geographical barriers, independent of geographic distance. The negative correlation between genetic similarity and geographic distance between populations is known as isolation by distance (IBD). The level of gene flow is at maximum between adjacent populations and decreases with increase in geographic distance.

When a species has a wide distributional range relative to its dispersal capacity, geographic variation in a trait may be explained by the balance of gene flow and selection. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Ĭompeting interests: The authors have declared that no competing interests exist. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.įunding: This work was supported financially by a research grant of the National Academy of Agricultural Science (PJ006788) to YJ and by a National Research Foundation of Korea grant (371-2009-1-C00001) to Y-JW. Received: JAccepted: JPublished: August 17, 2011Ĭopyright: © 2011 Jang et al. PLoS ONE 6(8):Įditor: Matjaz Perc, University of Maribor, Slovenia Citation: Jang Y, Hahm EH, Lee H-J, Park S, Won Y-J, Choe JC (2011) Geographic Variation in Advertisement Calls in a Tree Frog Species: Gene Flow and Selection Hypotheses.

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