High DNA sequence diversity in pericentromeric genes of the plant Arabidopsis lyrata

Akira Kawabe, Alan Forrest, Stephen I. Wright, Deborah Charlesworth

Research output: Contribution to journalArticlepeer-review

Abstract

Differences in neutral diversity at different loci are predicted to arise due to differences in mutation rates and from the "hitchhiking" effects of natural selection. Consistent with hitchhiking models, Drosophila melanogaster chromosome regions with very low recombination have unusually low nucleotide diversity. We compared levels of diversity front five pericentromeric regions with regions of normal recombination in Arabidopsis lyrata, an outcrossing close relative of the highly selfing A. thaliana. fit contrast with the accepted theoretical prediction, and the pattern in Drosophila, we found generally high diversity in pericentromeric genes, which is consistent with the observation in A. thaliana. Our data rule out balancing selection in the pericentromeric regions, suggesting that hitchhiking is more strongly reducing diversity in the chromosome arms than the pericentromere regions.

Original languageEnglish
Pages (from-to)985-995
Number of pages11
JournalGenetics
Volume179
Issue number2
DOIs
Publication statusPublished - Jun 2008

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