Table 5. Silent nucleotide diversity and age of the different gene arrangements using the Fmr1 gene.

	Estimates from the two most divergent individuals			Estimates from all individuals but recombinants
	πsil	Age (Myr)a	Age (Myr)b	πsil	Age (Myr)a	Age (Myr)b
O3+4 c	0.019	2.24	1.01	0.008	0.98	0.44
OST c	0.015	1.71	0.77	0.009	1.09	0.49
O3+4 MP	0.014	1.70	0.77	0.009	1.00	0.45
O3+4 BC	0.016	1.93	0.87	0.008	0.90	0.41
OST BC	0.014	1.59	0.72	0.009	1.06	0.48

Abbreviation: Myr, million years.

The least biased estimate is indicated in bold (see discussion).

^aAge estimation assuming that the species diverged 17.7 Myr ago (Tamura et al., 2004).

^bAge estimation assuming that D. subobscura and D. pseudoobscura diverged 8 Myr ago (Ramos-Onsins et al., 1998).

^cIndividuals from both populations combined.