Figure 3. Unweighted pair group method with arithmetic mean (UPGMA) tree depicting the relationships between 15 Solanum rostratum populations from Mexico, the U.S.A. and China.

The tree is based on the standardized genetic distances among populations (Nei's D _S) calculated from a matrix of genotypes at 10 microsatellite loci. The numbers above the nodes represent percentage of bootstrap support (1000 replications). Only bootstrap support above 50% is shown. Population codes as in Table 1.