TABLE 2.

Population structure, geography, and environmental heterogeneity are correlated (Pearson's r) across the range of loblolly pine

	SSR-STRa			SSR-PCAb		SNP-PCAb
	AP1	AP2	AP3	PC1	PC2	PC1	PC2
Latitude	−0.21***	0.20***	0.02	0.22***	−0.04	−0.39***	−0.39***
Longitude	−0.37***	0.34***	0.04	0.39***	−0.03	−0.71***	−0.34***
AI1	0.05	0.13**	0.13**	−0.13**	0.04	0.08	0.49***
AI2	0.23***	−0.25***	0.03	−0.27***	0.04	0.34***	0.38***
AI3	−0.12**	0.12**	0.01	0.16***	0.06	−0.33***	−0.08*
AI4	0.21***	−0.25***	0.07	−0.26***	0.04	0.36***	0.41***

K = 3 for population structure. *P < 0.05, **P < 0.005, ***P < 0.0005.

^aCorrelations are with the assignment probabilities (AP) for each cluster derived using STRUCTURE.

^bCorrelations are with the first two principal components (PCs), which define three clusters.