Fig. 5

ML phylogeny of 5S rRNA genes consensus sequences from blue-flowered flaxes and the selected out-group – yellow-flowered flax L. nodiflorum (sect. Syllinum). The values shown below branches are node supports assessed by the Bayesian-like modification of the approximate likelihood ratio test (aBayes) [25]. The abbreviations of the names of the samples are explained in the Additional file 1. For flax specimens possessing different classes of 5S rRNA genes sequences, the numbers of corresponding classes (cl) are shown below the name abbreviations