Institut für Züchtungsforschung an gartenbaulichen Kulturen
The northern root-knot nematode Meloidogyne hapla leads to relevant economic losses in carrot production in temperate zone by yield reduction and considerable quality losses of infested batches. Application of chemical nematicides is forbidden in Germany. Carrot cultivars resistant to M. hapla are not available so far. Breeding approaches are limited becouse of the lack of resistance resources and genetic knowledge. In a former JKI project was proven that in a number of Daucus wild relatives such as D. c. ssp. azoricus, D. c. ssp. commutatus, D. halophilus and D. capillifolius resistances to M. hapla are available. These resistances were proven also after subsequent backcrosses to the cultivated carrot D. c. ssp. sativus Hoffm. (Arc.). Aim of the project is to lay foundations for pyramidisation of two or more resistance genes against M. hapla and to provide basic material for practical breeding.
Federal Ministry of Food and Agriculture
