Roegneria yenchiana: a new species in the Triticeae (Poaceae) from the
Hengduan Mountain Region
Abstract
Roegneria yenchiana sp. nov. (Triticeae) is described as a new species
collected from Shangri-la of Yunnan Province in China based on
morphological, cytological, and molecular data. It is morphologically
characterized by one spikelet per node, rectangular glums, awns flanked
by two short mucros in lemmas, which is distinguished from other species
of Roegneria. The genomic in situ hybridization results indicate that R.
yenchiana is an allotetraploid, and its genomic constitution is StY.
Phylogenetic analyses based on multiple loci suggested that R. yenchiana
is closely related to Pseudoroegneria and Roegneria, and the
Pseudoroegneria served as the maternal donors during its polyploid
speciation.