Table 5.

Genetic differentiation within and between the three granivorous ground finch species. Geospiza fortis is represented by the small and large beak-size classes and by all size classes (including intermediates) pooled. p-values for genetic differentiation are above the diagonal. Bold entries are those that remained significant after sequential Bonferroni correction. F_ST values are below the upper diagonal, with asterisks (*) indicating 95% confidence intervals that do not overlap with zero. R_ST values are below the lower diagonal.

	G. fortis (small)	G. fortis (large)	G. fuliginosa	G. magnitrostris	G. fortis (all)
G. fortis (small)		<0.001	0. 01	<0.001	—
G. fortis (large)	0.011*		<0.001	<0.001	—
G. fuliginosa	0.022*	0.041*		<0.001	<0.001
G. magnitrostris	0.031*	0.021*	0.082*		<0.001
G. fortis (all)	—	—	0.029*	0.026*
G. fortis (small)
G. fortis (large)	0.017
G. fuliginosa	0.001	0.036
G. magnitrostris	0.014	0.001	0.054
G. fortis (all)	—	—	0.011	0.001