Fig. 3From: Natural variation in genes potentially involved in plant architecture and adaptation in switchgrass (Panicum virgatum L.)Principal coordinates analysis for 251 SNPs across the switchgrass genotypes. The genotypes are color-coded according to their affiliation to STRUCTURE subpopulations at K = 3. The cluster C1 comprises mainly upland ecotypes whereas genotypes from C2 and C3 are mostly lowland ecotypesBack to article page