Sexual Incompatibility between Maize and Its Wild Relatives Tripsacum L. and Coix L. Preliminary Study of Trait Variations in the Progenies of Inbred Maize Lines×Zea luxurians Karyotype and SSR Analysis between Inbredline K169 and Its Distant Derived Lines from Zea mexicana schard×K169 EFFECTS OF THE IRRADIATED POLLEN ASSISTING POLLINATION TECHNIQUE ON THE SEEDSET OF LILY’S DISTANT CROSS AND EARLY MOLECULAR IDENTIFICATION OF THE HYBRIDS THE EFFECTS OF DIFFERENT POLLINATION METHODS ON OVERCOMING DISTANT CROSS BARRIERS OF THE LILY ‘CORDELIA‘×Lilium dauricum STUDY ON SEED SET AND HETEROSES OF DISTANT CROSS OF UPLAND RICE( Oryza sativa) ×LONG-AWN-BARNYARD-GRASS( Echinochloa caudata) Research and Application of Embryo Rescue Techniques in Fruit Tree Breeding Effects of KCl Stress on Physiology of Lilium Stigma and Seed Setting Study on Sorghum sudanese × S.propinguum interspecies hybridization Inheritance of Seed Setting Rate in Maize×Z.perennis Crosses Research and Application of Embryo Rescue Techniques in Fruit Tree Breeding Response of Gas Exchange, Chlorophyll a Fluorescence and Anti-oxidation Enzymes Activities to Osmotic Stress in an Upland Rice Progeny YF2-1 Derived from Oryza sativa × Echinochloa caudata