Diversity analysis. Unweighted group method of arithmetic averages (UPGMA) phenogram constructed using allele scores of 64 SNP (top panel) or 28 SSR (bottom panel) markers. Continental tall fescue accessions are coloured green and Continental tall fescue accessions with an alternate chloroplast DNA matK haplotype are dark green. Mediterranean tall fescue accessions are coloured blue and rhizomatous tall fescue accessions, pink. Scale bars represent the dissimilarity index as determined using the Dice coefficient.