Hierarchical analyses of variance for hypothesized groupings, based on data from 11 microsatellite loci (top) and mtDNA sequence data (bottom).

Shown are fixation indices and percentage of the total variance explained by the hypothesized regional grouping and significance. The first grouping (Model A) tests the hypothesis that genetic variation is partitioned along currently accepted subspecies designations (e.g., F. p. tundrius, F. p. anatum, and F. p. pealei, with SJI placed with pealei). Bold values are significantly different from zero (P P