Table 1.

Polymorphism analyses and neutrality tests of six groups

	Seq	Hp	K	S	η	Pa	η(s)	Ka	Ks	Ka/Ks	θa	πb	Tajima's	Dd	Fd	Host
Group 1	14	13	10.604	39	43	18	24	0.036849	0.216865	0.178854	12.578(3.955)	0.06321(0.01264)	−0.94103	−0.918755	−1.18411	Porcine
Group 2	18	17	18.353	52	61	41	17	0.045231	0.754099	0.146385	15.677(4.637)	0.11056(0.01606)	0.14454	0.16258	0.18269	Porcine
Group 3	12	11	6.333	24	24	10	14	0.019783	0.11238	0.385676	7.285(2.412)	0.03598(0.00552)	−0.90266	−0.96741	−1.08234	Avian
Group 4	21	20	10.152	64	85	21	64	0.05963	0.113056	0.370711	21.680(6.026)	0.05835(0.01915)	−2.17764d	−1.95013c	−1.98344	Uncultured
Group 5	11	11	30.582	74	98	47	41	0.091158	0.807	0.092125	25.265(8.626)	0.16896(0.01711)	−0.41194	−0.18922	−0.28001	Monkey
Group 6	12	12	11.455	53	56	11	45	0.034495	0.275658	0.180213	17.882(5.921)	0.06508(0.02254)	−1.7603	−2.01308	−2.21957	Human

^aVariance of θ (free recombination).

^bStandard deviation of π.

^cStatistical significance P < 0.02 (for Fu and Li's test), P < 0.01 (for Tajima's test).

^dStatistical significance P < 0.05 (for all tests).

Hp, haplotypes; K, average number of pairwise difference; S, number of polymorphic (segregating) sites; η, total number of mutations; Pa, parsimony informative sites; η(s), number of singletons; Ka, rate of non-synonymous substitutions; Ks, rate of synonymous substitutions; π, nucleotide diversity; θ, Watterson's mutation parameter (per sequence calculated from S).