Genetic variation analysis of gliadin from wild germplasm of Psathyrostachys juncea Fluorescence in situ Hybridization and Southern Blot Analyses on Leymus racemosus and Related Species The Relationships of Environmental Factors and the Photosynthetic Characteristics of Psathyrostachys juncea ‘Mengnong No. 4’ in Loess Plateau Region Yield and Its Contributors of Agropyron mongolicum Keng and Psathyrostachys juncea(Fisch.) Nevski under Irrigation and Rainfed Conditions