Figure 5.

Two-row varieties are differentiated by farmer names. (A) First and second PCA axes on covariance of allele frequencies of 2-rowed samples by site and variety. Populations are labeled as one of four 2-rowed varieties: Ocho (O), Wake (W), Solga (S), and Koltso (K), and cluster by variety name. Populations identified by north (light) and south (dark). (B) STRUCTURE analysis of 2-rowed varieties, at k = 5, shows inferred populations corresponding to variety names. The Ocho variety, the most widespread, appears as a distinct population in the northern portion of the range, and as a mixture in the southern portion of the range.