Keeping it local: evidence for positive selection in Swedish Arabidopsis thaliana.

ABSTRACT: Detecting positive selection in species with heterogeneous habitats and complex demography is notoriously difficult and prone to statistical biases. The model plant Arabidopsis thaliana exemplifies this problem: In spite of the large amounts of data, little evidence for classic selective sweeps has been found. Moreover, many aspects of the demography are unclear, which makes it hard to judge whether the few signals are indeed signs of selection, or false positives caused by demographic events. Here, we focus on Swedish A. thaliana and we find that the demography can be approximated as a two-population model. Careful analysis of the data shows that such a two island model is characterized by a very old split time that significantly predates the last glacial maximum followed by secondary con

SUBMITTER: Huber CD 

PROVIDER: S-EPMC4209139 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature