Provides a critical synthesis of information from breeding programs & genetic studies that integrates developments in molecular biology & biotechnology, including information on the biology of infection & the process of its interruption. Begins with an appraisal of the status of research on the important vegetable crops & their wild relatives. Topics covered include a comprehensive survey of known viral resistance genes in a number of important vegetable crops, including the identification of genes & gene families that confer broad-spectrum resistance to plant viruses.