Relationships Between the Fruit-bearing Characters of Leymus chinensis Population and Annual Climatic Variations in Natural Meadow in Northeast China STUDIES ON SEED SETTING PERCENTAGE OF HYBRID RICE A Preliminary Study on Self-incompatibility of Leymus chinensis DETERMINATION OF POLLINIZERS FOR MAJOR GROWN CULTIVARS OF CHINESE SOUTHERN PEAR Screening Parent Resources of Hybrid Rice in New Cytoplasm Male Ste- rile System (CMS-FA) The Stigma Observation on Foxtail Millet (Setaria italica Beauv.) Male-sterile Line “81-16” with High Outcross Seed Setting Preliminary study on intraspecific hybridization of Cerasus pseudocerasus and interspecific hybridization with C. avium