A Preliminary Study on Interspecific Hybridization between Brassica napus and Purple-caitai Contributions of Chinese Botanists to Plant Tissue Culture in the 20th Century Autotriploid Plants Obtained from Heteroploid Rice Crosses Induction of Autotetraploid Cucumbers by Unpollinated Ovary Culture and Their Characterization Induction of Autotetraploid Cucumbers by Unpollinated Ovary Culture and Their Characterization STUDIES ON IN VITRO CULTURE OF POLLINATED OVARY IN INTERSPECIFIC CROSSES BETWEEN BRASSICA SPECIES Production and Characterization of Intergeneric Hybrids between Bras-sica Species (B. juncea, B. nigra) and Orychophragmus violaceus by Ovary Culture Further Embryological Studies on the in Vitro Apogamy in Oryza saliva L. A New Cucumber Cultivar‘Jinmei 3’ Bred by Unfertilized Ovary Culture A New Cucumber Cultivar‘Jinmei 3’ Bred by Unfertilized Ovary Culture Resynthesis of Brassica napus with Brassica oleracea or Brassica rapa Cytoplasm Embryogenesis and Plant Regeneration from Unpollinated Ovary Culture of Lily Morphogenetic Aspects of Gynogenetic Embryoid and Callus in Ovary Culture of Oryza sativa L.