MULTIVARIATE ADAPTATION BUT NO INCREASE IN COMPETITIVE ABILITY IN INVASIVE GERANIUM CAROLINIANUM L. (GERANIACEAE)

摘要: Adaptive evolution can affect the successful establishment of invasive species, but changes in selective pressures, loss genetic variation relevant traits, and/or altered trait correlations make adaptation difficult to predict. We used a common-garden experiment assess and patterns plant, Geranium carolinianum, sampled across 20 populations its native (United States) (China) ranges. multivariate QST - FST tests determine if phenotypic differences between countries are attributable adaptation. also compared population-level within each country whether local resulted similar phenotypes United States China. Between countries, most indistinguishable from drift, although we detected signature colder, drier winters There was no evidence for increases traits Within strong appears be driven by latitudinal climatic States, not Additionally, adaptive combinations as well their underlying differ two indicating that does parallel due selection constraints, or both.