Abstract: The methods and results of disease resistance and other resistant abilities of Begonia L. through crossbreeding were reported in this paper. Parents with disease resistance and ornamental value but easily effected by disease were used for crossing. Inbreeding of Fi for two generations in order to stabilize disease resistance property and to achieve ornamental and disease resistance strains. Continuously back crossing could transfer the property of disease resistance to those with ornamental value plants for breeding new cultivars. According to the principle of the properties of parents can be compensated mutually together with using of heterosis of Fi, distant hybridization between different sections, different ecological types and the species with strong resistance abilities were conducted. Six typical combinations and their characters were analyzed based on thirty combinations. The growth capacity of offspring colony, the incidence of disease and the determination of resistant abilities were preliminarily studied and discussed.

Key words: Begonia