title: Admixture determines genetic diversity and population differentiation in the biological invasion of a lizard species.
abstract: Molecular genetic analyses show that introduced populations undergoing biological invasions often bring together individuals from genetically disparate native-range source populations, which can elevate genotypic variation if these individuals interbreed. Differential admixture among multiple native-range sources explains mitochondrial haplotypic diversity within and differentiation among invasive populations of the lizard Anolis sagrei. Our examination of microsatellite variation supports the hypothesis that lizards from disparate native-range sources, identified using mtDNA haplotypes, form genetically admixed introduced populations. Furthermore, within-population genotypic diversity increases with the number of sources and among-population genotypic differentiation reflects disparity in their native-range sources. If adaptive genetic variation is similarly restructured, then the ability of invasive species to adapt to new conditions may be enhanced.
authors.affiliation: Department of Biology, Washington University, St Louis, MO 63130, USA. kolbe@berkeley.edu
authors.forename: Jason J
authors.initials: JJ
authors.lastname: Kolbe
authors.forename: Allan
authors.initials: A
authors.lastname: Larson
authors.forename: Jonathan B
authors.initials: JB
authors.lastname: Losos
authors.forename: Kevin
authors.initials: K
authors.lastname: de Queiroz
mesh_terms: D000483:Alleles; D000818:Animals; D001522:Behavior, Animal; D004272:DNA, Mitochondrial / Q000737:chemistry; D017753:Ecosystem; D014644:Genetic Variation; D006239:Haplotypes; D006824:Hybridization, Genetic; D008116:Lizards / Q000235:genetics* / Q000502:physiology; D018895:Microsatellite Repeats; D010802:Phylogeny; D011157:Population Dynamics; D017422:Sequence Analysis, DNA; D015144:Southeastern United States
chemical_list: D004272:DNA, Mitochondrial