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dc.contributor.authorSezen, U. Uzayen_US
dc.contributor.authorBarney, Jacoben_US
dc.contributor.authorAtwater, Daniel Z.en_US
dc.contributor.authorPederson, Gary A.en_US
dc.contributor.authorPederson, Jeffrey F.en_US
dc.contributor.authorChandler, J. Mikeen_US
dc.contributor.authorCox, T. Stanen_US
dc.contributor.authorCox, Sheilaen_US
dc.contributor.authorDotray, Peteren_US
dc.contributor.authorKopec, Daviden_US
dc.contributor.authorSmith, Steven E.en_US
dc.contributor.authorSchroeder, Jillen_US
dc.contributor.authorWright, Steven D.en_US
dc.contributor.authorJiao, Yuannianen_US
dc.contributor.authorKong, Wenqianen_US
dc.contributor.authorGoff, Valorieen_US
dc.contributor.authorAuckland, Susanen_US
dc.contributor.authorRainville, Lisa K.en_US
dc.contributor.authorPierce, Gary J.en_US
dc.contributor.authorLemke, Corneliaen_US
dc.contributor.authorCompton, Rosanaen_US
dc.contributor.authorPhillips, Christineen_US
dc.contributor.authorKerr, Alexandraen_US
dc.contributor.authorMettler, Matthewen_US
dc.contributor.authorPaterson, Andrew H.en_US
dc.description.abstractJohnsongrass (Sorghum halepense) is a striking example of a post-Columbian founder event. This natural experiment within ecological time-scales provides a unique opportunity for understanding patterns of continent-wide genetic diversity following range expansion. Microsatellite markers were used for population genetic analyses including leaf-optimized Neighbor-Joining tree, pairwise FST, mismatch analysis, principle coordinate analysis, Tajima’s D, Fu’s F and Bayesian clusterings of population structure. Evidence indicates two geographically distant introductions of divergent genotypes, which spread across much of the US in <200 years. Based on geophylogeny, gene flow patterns can be inferred to have involved five phases. Centers of genetic diversity have shifted from two introduction sites separated by ~2000 miles toward the middle of the range, consistent with admixture between genotypes from the respective introductions. Genotyping provides evidence for a ‘habitat switch’ from agricultural to non-agricultural systems and may contribute to both Johnsongrass ubiquity and aggressiveness. Despite lower and more structured diversity at the invasion front, Johnsongrass continues to advance northward into cooler and drier habitats. Association genetic approaches may permit identification of alleles contributing to the habitat switch or other traits important to weed/invasive management and/or crop improvement.
dc.rightsCreative Commons Attribution 4.0en_US
dc.titleMulti-Phase US Spread and Habitat Switching of a Post-Columbian Invasive, Sorghum halepenseen_US
dc.typeArticle - Refereeden_US
dc.description.versionPeer Revieweden_US
dc.contributor.departmentSchool of Plant and Environmental Sciencesen_US
dc.title.serialPLOS ONEen_US

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Creative Commons Attribution 4.0
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