Table 1. Statistics for 248 bp fragment of MHC IIB exon 2 in corvid birds used in this study.

Cobr = American crow; Coco = carrion crow; Coma = jungle crow; Cofr = Asian rook; Gagl = Eurasian jay; Pipi = Eurasian magpie; Cycy = azure-winged magpie.

Species	n	Variants (total)	Variants (individual)	π1	π dS2	π dN3	dN / dS	P-value Z-test4	P-value Z-test PBR5
Cobr	18	33	11–18	0.162	0.119	0.177	1.5	<0.0001	0.008
Coco	18	56	12–20	0.160	0.113	0.179	1.6	0.001	0.005
Coma	18	31	7–18	0.168	0.134	0.181	1.3	0.004	0.01
Cofr	3	27	8–15	0.179	0.136	0.194	1.4	0.001	0.006
Gagl	4	28	9–19	0.177	0.147	0.188	1.3	0.002	0.0015
Pipi	4	20	9–11	0.175	0.128	0.194	1.5	<0.0001	0.003
Cycy	3	18	8–12	0.188	0.151	0.201	1.3	0.001	0.008

¹ nucleotide diversity

² synonymous substitution rate

³non-synonymous substitution rate

⁴codon test for selection using entire fragment

⁵codon test for selection using the peptide binding region partition from Brown et al. [36]