Phylogenetic relationships and Y genome origin in Kengyilia (Triticeae: Poaceae) based on single copy gene DMC1

To investigate the phylogenetic relationships among Kengyilia and related diploid genera, the genome donor of Kengyilia, and the evolutionary history of polyploid Kengyilia species, disrupted meiotic cDNA1 (DMC1) sequences were analyzed for 11 Kengyilia species, together with 34 diploid taxa from 12 monogenomic genera. Sequence diversity and genealogical analysis suggested that (1) the St and P genomes were donated by Pseudoroegneria and Agropyron, respectively; (2) phylogenetic analyses separated the Y sequences from the St sequences, it confirmed that St and Y genome in Kengyilia species have originated from different donors; (3) the St genome of Kengyilia had several origins and diverse species of Pseudoroegneria might have taken part in the formation of polyploid species of Kengyilia.