Table 1.

Summary Statistics of Population Variation for the Two Adult β-globin Genes

Population	Na	HBD					HBB
		Lb	Sc	πd	θwe	TDf	L	S	π	θw	TD
PT	50	1,879	1	0.21	1.18	−1.10*	1,843	7	7.82	8.49	−0.21
CEU	46	1,879	1	0.23	1.21	−1.11*	1,843	8	8.23	9.89	−0.46
YRI	46	1,879	8	4.55	9.66	−1.53**	1,843	9	8.11	11.12	−0.77

^aNumber of chromosomes.

^bTotal number of sites surveyed.

^cPolymorphic sites.

^dNucleotide diversity (×10⁴) (Nei and Li 1979).

^eWatterson θ per site (×10⁴) (Watterson 1975).

^fTajima’s D statistic (Tajima 1989).

*P ≤ 0.001 according to the constant size model, to the best fit model from Schaffner et al. (2005) and to the best fit model from Gutenkunst et al. (2009).

**P ≤ 0.05 according to the constant size model and to the best fit model from Gutenkunst et al. (2009).