Somatic Cell Karyotypes of Three Elytrigia elongata Accessions CYTOLOGICAL CHARACTERISTIC ON MICROSPOROGENESIS AND MALE GAMETOPHYTE DEVELOPMENT OF ( T.AESTIVUM/E.ELONGATA )F 1 A STUDY ON THE AGRONOMIC TRAITS OF THE NUCLEUS CYTOPLASM (NC)HYBRID WHEAT WITH ELYTRIGIA ELONGATA CYTOPLASM A PRELIMINARY STUDY ON A SUPER-DWARF NC HYBRID WHEAT Isozyme Studies of Elytrigia Hybrids(E. elongate×E. intermedia) and Their Parents Genetics Analysis on Quantitative Characters in Common Wheat-Wheatgrass Alien Addition Lines The Establishment and Cytogenetic Analysis of NC Hybrid of Elytrigiáelongata×Triticum aestivurn