Tomato diversified by modern plant Breeding

The diversity among glasshouse tomatoes in nw Europe was low in the 1950s, and even lower in the 1960s, due to inbreeding and selection. But from the 1970s onwards the diversity increased considerably because of introgressions of disease resistances from wild donors, and introgressions for fruit quality since the 1990s in response to the ‘Wasserbombe’ crisis.