Publication Date
1993
Description
White clover (Trifolium repens L.), a key legume in New Zealand pastures, is parasitised by Heterodera trifolii, the clover cyst nematode. Resistance breeding is the most feasible control, and screening of 1st generation crosses has made considerable progress. Progeny of parents selected for resistance had only 39% cysts/g root dry weight of susceptible lines, and all resistant lines were lower when ranked. These resistant selections also had less fewer cysts per plant, heavier root dry weights and higher shoot growth scores. The parents of the most resistant lines were from two Italian ladino cultivars (Ladino Gigante Lodigiano and Espanso), a separate nematode screening,programrile at Kaikohe (New Zealand) and SC-I, bred in the USA for tolerance to the southern root knot nematode (Meloidogyne incognita). These results indicate that further breeding should result in a resistant cultivar.
Citation
Bosch, J Van; Mercer, C F.; Grant, J L.; and Black, I K., "Clover Cyst Nematode Resistance in White Clover" (2024). IGC Proceedings (1993-2023). 22.
https://uknowledge.uky.edu/igc/1993/session22/22
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Clover Cyst Nematode Resistance in White Clover
White clover (Trifolium repens L.), a key legume in New Zealand pastures, is parasitised by Heterodera trifolii, the clover cyst nematode. Resistance breeding is the most feasible control, and screening of 1st generation crosses has made considerable progress. Progeny of parents selected for resistance had only 39% cysts/g root dry weight of susceptible lines, and all resistant lines were lower when ranked. These resistant selections also had less fewer cysts per plant, heavier root dry weights and higher shoot growth scores. The parents of the most resistant lines were from two Italian ladino cultivars (Ladino Gigante Lodigiano and Espanso), a separate nematode screening,programrile at Kaikohe (New Zealand) and SC-I, bred in the USA for tolerance to the southern root knot nematode (Meloidogyne incognita). These results indicate that further breeding should result in a resistant cultivar.
