Fig. 1

Maximum-likelihood tree (−Lnlikelihood = 3004.4870, base frequencies A: 0.21490, C: 0.26170, G: 0.27980, T: 0.24360, pinvar = none, shape = 0.5849) inferred from the nrITS sequences of Elymus L. sensu lato and its affinitive species, under GTR + G model. Numbers with bold above nodes are bootstrap values ≥ 50 %. The capital letters in bracket indicate the genome type of the species. Different color labeled the genera of Elymus L. sensu lato species