Environmental correlates of cytotype distribution in Andropogon gerardii (Poaceae).

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Premise Of The Study: Information about geographic distribution of cytotypes can provide insight into the origin and maintenance of autopolyploid complexes and builds a foundation for understanding cytotype differentiation and the dynamics of mixed-ploidy populations. Here, we investigate environmental correlates of the geographic distributions of 6x and 9x individuals in the ecologically dominant grass Andropogon gerardii to examine the role of climate in shaping patterns of cytotype distribution in this species.•

Methods: Flow cytometry was used to estimate ploidy level in 352 individuals from 32 populations across North America.