Fig. 4

The genetic structure of the three parental species of Rhododendron and their two types of hybrids. (a) Results of Admixture analysis (K=3), NewHybrids analysis (BC-SN = backcross with SN, BC-SC = backcross with SC, UN = unidentified) and individual haplotypes for the trnL-F cpDNA region; (b) PCoA analysis of the hybrid zone based on the five groups of taxa; (c) MSN analysis showing the genetic distance among individuals within each of the five groups. (R. spiciferum [SC], R. spinuliferum [SN], R. scabrifolium [SA], R. ×duclouxii [SN×SC], the novel hybrid [SN×SA: R. spinuliferum × R. scabrifolium])