Data from: Independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback

Charles B Kimmel, William A Cresko, Patrick C. Phillips, Bonnie Ullmann, Mark Currey, Frank Von Hippel, Bjarni K Kristjánsson, Ofer Gelmond & Katrina McGuigan
Evolution of similar phenotypes in independent populations is often taken as evidence of adaptation to the same fitness optimum. However, the genetic architecture of traits might cause evolution to proceed more often toward particular phenotypes, and less often toward others, independently of the adaptive value of the traits. Freshwater populations of Alaskan threespine stickleback have repeatedly evolved the same distinctive opercle shape after divergence from an oceanic ancestor. Here we demonstrate that this pattern of...
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