Table 2. Clock poly-Q allele frequencies, number of alleles (k), mean allele size (with standard errors) and observed heterozygosities (H) for the five Barn Swallow populations used in this study.

Population	Subspecies	N	k	Mean allele size (s.e.)	Allele proportion			H
					Q6	Q7	Q8
Israel	transitiva	49	3	6.96 (0.03)	0.051	0.939	0.010	0.082
United Kingdom	rustica	49	2	6.99 (0.01)	0.010	0.990	0.000	0.020
New York	erythrogaster	49	2	7.01 (0.01)	0.000	0.990	0.010	0.020
California	erythrogaster	31	2	7.02 (0.02)	0.000	0.984	0.016	0.032
Argentina	erythrogaster	52	1	7.00 (0.00)	0.000	1.000	0.000	0.000
Total		230	3	6.99 (0.01)	0.013	0.980	0.007	0.030

Allele frequencies did not deviate from Hardy-Weinberg equilibrium for all populations (P>0.05).