Table 4. Correlation coefficients between genomic estimated breeding values (GEBV) for winter survival (Spring 2014 or 2015) and climatic or geographic variables of switchgrass accessions comprising Validation data set #1.

		Min Tempa		Latitude		Longitude
Training set	Method	Spring 2014	Spring 2015	Spring 2014	Spring 2015	Spring 2014	Spring 2015
All Populations	GBLUP	−0.23b	−0.04	0.57	0.32	−0.76	−0.60
All Lowland	GBLUP	−0.27	−0.15	0.61	0.47	−0.78	−0.70
Southern Lowland	GBLUP	−0.26	−0.17	0.09	−0.05	0.25	−0.19
All Populations	GBLUP-MPM	−0.37	−0.10	0.71	0.43	−0.80	−0.69
All Lowland	GBLUP-MPM	−0.38	−0.29	0.72	0.62	−0.80	−0.74
Southern Lowland	GBLUP-MPM	−0.26	−0.17	−0.05	0.07	0.25	−0.19

^aMin Temp = 30-yr mean minimum temperature of the coldest month at the site of origin of source population.

^bCritical values for P < 0.01 significance are: 0.14 for All Populations, 0.17 for All Lowland, and 0.20 for Southern Lowland.