Genes, QTLs and linked molecular markers conferring the resistance for various biotic stresses in tomato cultivar

Tomato (Solanum lycopersicum L.) is one of the important consumable vegetable after potato. Tomato is frequently grown across the world for fresh vegetable and industrial processing. Tomato is the richest source of vitamins (vitamin A and C) and other nutritive minerals. Cultivated tomato is highly susceptible to several biotic stresses like insects, fungi, bacteria, viruses and nematodes. Development of biotic stress resistance cultivar of tomato is one of the challenging efforts. In this context, traditional breeding is not successful tools for development of multiple disease resistant tomato cultivars. Molecular markers based breeding for the incorporation of desirable traits conferring the resistance for biotic threats is one of the powerful tools in tomato breeding programmes. Wild relatives of tomato having many resistance genes and QTLs which conferring the resistance against pathogens and the diseases. However, utilization of linked molecular markers associated to resistance traits is one of the wonderful strategies for pyramiding of genes for multiple biotic stresses as well as future breeding programmes.