Phylogeny and maternal donor of Kengyilia species (Poaceae: Triticeae) based on three cpDNA (matK, rbcL and trnH-psbA) sequences

► Kengyilia was related to Agropyron, Pseudoroegneria and Roegneria. ► At least two phylogenetically divergent maternal donors within Kengyilia. ► Kengyilia grandiglumis, Kengyilia hirsuta, Kengyilia laxiflora, and Kengyilia rigidula might be a unique origin.