Conservation of tomato species germplasm
The tomato is a classic example of a cultivated plant that has been markedly improved by hybridization with primitive cultivars and related wild species. During the past 40 years such crosses have transferred genes for many useful traits. Resistance to Fusarium and Verticillium wilts and to nematodes was bred from these sources. High soluble solids content of fruits and resistance to other diseases are currently being transferred to improved cultivars.