STRUCTURE analysis of SSR markers from all switchgrass cultivars and collected plants (n = 365).

<p>Individuals are shown as a vertical line representing the membership fractions for each of the K populations and sorted according to q-value (K = 9). Switchgrass lineages abbreviated as shown in [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130414#pone.0130414.ref042" target="_blank">42</a>]. Other abbreviation: Southern New England Lowland Tetraploid, SNELT; UID, Unidentified. Genotype groups with an asterisk (*) include one or more individuals collected from the LISCL coastal ecoregion or inland road verges.