Studies on the Interspecific Hybridization in the Genus Fragaria CURRENT RESEARCHES ON UNREDUCED GAMATE FORMATION AND ITS UTLIZATION IN PLANT BREEDING NATURAL DOUBLING OF CHROMOSOMES OF HYBRIDS BETWEEN WHEAT AND RYE Studies on the Interspecific Hybridization in the Genus Fragaria 偃麦草与小偃麦染色体组构成的细胞遗传学研究在Ⅴ.硬粒小麦与中间偃麦草杂交及回交的细胞遗传学研究 Cytogenetic Study on the Formation of Amphiploids in the F_1 Hybrids of Triticurn carthlicum Nevskivar and Aegilops tauschii Cosson Detection of the Molecular Marker and Chromosomal Segment linked to Unreduced Gamete Gene in Common Wheat STUDY ON SELECTION AND SYNTHETIC PROCEDURE OF TRITITRIGIA