Sampling sites and allele distributions.

<p>(A) Circles indicate sample locations, among them I = 1, II = 2, III = 2, IV = 22, V = 13, VI = 3, VII = 21, and VIII = 9. Numbers indicate sample’s ID (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0116499#pone.0116499.s002" target="_blank">S1 Table</a>). Four geographical populations (group 1 to group 4) are divided according to the previous study [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0116499#pone.0116499.ref008" target="_blank">8</a>]. Grey shade means the range of the Hume’s pheasant (<i>Syrmaticus humiae</i>) in China. (B) MHC class II B (MHCIIB) exon 2 allele distributions. Black boxes indicate allele sharing among groups, and red boxes indicate rare alleles.