Table 2.

Exact Mean Coalescence Times and F_ST Values for 2-Vertex Motifs.

Motif	${\overline{t}}_{11}$	${\overline{t}}_{22}$	${\overline{t}}_{12}$	${\overline{F}}_{12}$
	1	1	$\infty$	1
	2	2	$2(1+\frac{1}{2M})$	$\frac{1}{1+4M}$

Note.—${\overline{t}}_{\mathit{ij}}$ represents the expected coalescence time for a pair of lineages, one sampled from subpopulation i and one sampled from subpopulation j (eq. 3). ${\overline{F}}_{\mathit{ij}}$ is the value of F_ST between subpopulations i and j (eq. 5).