Figure 5.

Phylograms depicting genetic diversity among sequences from the six non-surface glycoprotein RNA segments isolated from northern pintails in Alaska (black circles) and California (white circles). Unlabelled roots of each tree are equine reference samples included as outgroups. Bayesian posterior probabilities and levels of neighbor-joining bootstrap support >70% between major clades are shown on branches for three segments (NS, PA, and PB2) that exhibit patterns of Alaska- or California-specific lineages (see text).