Table 2 Comparison of genetic diversity at MHC class I exon 3 in four different charadriiform species. Segregating sites of amino acids (Saa), nucleotides (Snt), and average nucleotide diversity (Ï€), from 21 sequences randomly chosen by each of these species. Diversity indices and the synonymous (dS) and non-synonymous (dN) substitution rates were calculated for the complete sequences (All), the PBR and the non-PBR sites
|  | dN ± S.E | dS ± S.E | dN/dS | Snt | Saa | π |
|---|---|---|---|---|---|---|
Snowy Plover (Charadrius nivosus nivosus) | ||||||
 All | 0.05 ± 0.01 | 0.07 ± 0.02 | 0.71 | 47 | 19 | 0.05 |
 PBR | 0.29 ± 0.10 | 0.09 ± 0.05 | 3.22 | 19 | 8 | 0.19 |
 Non-PBR | 0.02 ± 0.01 | 0.06 ± 0.02 | 0.33 | 28 | 11 | 0.03 |
Red-billed Gull (Chroicocephalus scopulinus) | ||||||
 All | 0.08 ± 0.01 | 0.09 ± 0.02 | 0.90 | 64 | 34 | 0.08 |
 PBR | 0.36 ± 0.13 | 0.20 ± 0.13 | 1.80 | 20 | 9 | 0.24 |
 Non-PBR | 0.05 ± 0.01 | 0.08 ± 0.02 | 0.62 | 44 | 25 | 0.05 |
Red Knot (Calidris canutus) | ||||||
 All | 0.13 ± 0.02 | 0.15 ± .02 | 0.87 | 110 | 53 | 0.11 |
 PBR | 0.46 ± 0.17 | 0.24 ± 0.11 | 1.92 | 25 | 9 | 0.28 |
 Non-PBR | 0.09 ± 0.01 | 0.14 ± 0.03 | 0.64 | 85 | 44 | 0.09 |
Black-tailed Godwit (Limosa limosa) | ||||||
 All | 0.09 ± 0.02 | 0.10 ± 0.02 | 0.90 | 70 | 35 | 0.09 |
 PBR | 0.36 ± 0.14 | 0.32 ± 0.18 | 1.12 | 23 | 9 | 0.26 |
 Non-PBR | 0.05 ± 0.01 | 0.08 ± 0.02 | 0.62 | 47 | 26 | 0.05 |