Table 4.

Estimation of Demography for Two Chimpanzee Subspecies.

Methods	MIST	Won & Hey (2005)a	Hey (2010a)b	Becquet et al. (2007)c
No. loci	1,000	50	73	68
P. t. troglodytes (Ptt) Ne	27,081.38	27,900	27,832.67	33,000
P. t. verus (Ptv) Ne	6,342.3	7,600	7191.48	9,750
Common ancestor Ne	10,808.71	5,300	8,399.21	15,000
Splitting time (years)	347,732	422,000	410,000	439,000
Migration rate per generation
from Ptt to Ptv	1.621e-5	9.2115e-6	9.108e-6	–
from Ptv to Ptt	5.147e-18	1.1842e-7	7.0496e-6	–

Note.—Maximum a posteriori estimates of demography for P. t. troglodytes and P. t. verus from 3,000 loci of six sequences are compared with the estimates of previous studies. Model parameter estimates are shown on a demographic scale, using a per-site mutation rate per generation of $2\times {10}^{-8}$ and assuming 20 years per generation. Migration rates are backward in time.

^a–bIMa2(Hey and Nielsen 2007) was applied

^aGeometric mean of mutation rate per locus per generation of 7.808e-6 and 15 years per generation were assumed

^bGeometric mean of mutation rate per locus of 9.108e-6 and 20 years per generation were used.

^cMIMAR (Becquet and Przeworski 2007) was applied. The per-site mutation rate per generation of $2\times {10}^{-8}$ and 20 years per generation assumed.