Table 11.

Percentage of unique sequences, diversity (h), and pairwise differences (P) among samples from Alaska and California low pathogenic avian influenza virus isolates of northern pintails

	Alaska			California
RNA segment	% Unique*	h†	P	% Unique	h	P	ΦST
M	74	0.988	23.1	88	0.987	20.3	0.014
NP	91	0.994	75.9	88	0.987	98.7	0.029
NS	76	0.989	101.7	81	0.989	103.0	0.093
PA	97	0.998	170.2	97	0.997	160.1	0.156
PB1	97	0.986	95.4	84	0.987	94.8	0.017
PB2	100	0.999	139.5	93	0.995	140.8	0.060

Levels of population differentiation (Φ_ST) after incorporating a model of nucleotide evolution are also shown. Asian lineage segments identified in Alaska samples by Koehler et al. (2008) are not included.

^*Percentage of alleles (sequences) that are not shared by other virus isolates in the sampling area. No sequences were shared between Alaska and California.

^†Probability that any two randomly chosen sequences will differ.