Table 1. Description of switchgrass source populations and half-sib families used for genomic prediction of winter survival (training data sets).

Population	Ecotype	Source of germplasm	Number of families
Libertya	Lowland × Upland	Kanlow × Summer	111
WS11L	Lowland	Georgia and Alabama	36
WS08Lb	Lowland	Eastern and Southern USA, Great Plains	130
WS09L	Lowland	North Carolina, South Carolina, Florida	69
Expresso	Lowland	Mississippi	59

^aRamstein et al. (2016).

^bEvans et al. (2018a); Grabowski et al. (2017).