Population genomic variation reveals roles of history, adaptation and ploidy in switchgrass.

ABSTRACT: Geographic patterns of genetic variation are shaped by multiple evolutionary processes, including genetic drift, migration and natural selection. Switchgrass (Panicum virgatum L.) has strong genetic and adaptive differentiation despite life history characteristics that promote high levels of gene flow and can homogenize intraspecific differences, such as wind-pollination and self-incompatibility. To better understand how historical and contemporary factors shape variation in switchgrass, we use genotyping-by-sequencing to characterize switchgrass from across its range at 98 042 SNPs. Population structuring reflects biogeographic and ploidy differences within and between switchgrass ecotypes and indicates that biogeographic history, ploidy incompatibilities and differential adaptation each

SUBMITTER: Grabowski PP 

PROVIDER: S-EPMC4142443 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature