Attribution of SNPs to sub-genomes. Examples of neighbour joining trees that were constructed to identify the sub-genome origin of each validated SNP. The consensus sequence of putative sub-genomes from Jesup were aligned with the orthologous haplotypes from the progenitor species meadow fescue (F. pratensis – P sub-genome) and tetraploid tall fescue (F. glaucescens – G sub-genomes). The haplotype in which the SNP was identified is underlined in red. In these examples, the SNP was attributed to the P sub-genome (SNPs BE490658, h01_06rg_2u.s) and one of the G sub-genomes (SNPs BE405045, h09_17rg_1k.s).