The frequency of rDNA variants within individuals provides evidence of population history and gene flow across a grasshopper hybrid zone

The frequency of rDNA variants within individuals provides evidence of population history and gene flow across a grasshopper hybrid zone


Irene Keller, Paris Veltsos, Richard A Nichols

Evolution (2008/4/1) 62(4):833-844

In the grasshopper Podisma pedestris, units of the ribosomal DNA (rDNA) multigene family are not identical, but comprise multiple genetic variants. We surveyed this variation using a novel pyrosequencing approach. The history of the study populations is well characterized as the pattern of colonization can be inferred from the distribution of two chromosomal races that invaded from different directions after the last glacial maximum and finally met to form a hybrid zone. This knowledge of the populations’ ancestry allows us to draw inferences …


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