Which QTL Associations in Potato Confer Efficient and Durable Resistance to the Cyst Nematode Globodera pallida?
This study evaluates combinations of major and minor quantitative trait loci (QTL) derived from wild Solanum species to enhance the efficacy and durability of potato resistance against the cyst nematode Globodera pallida. It demonstrates that pairing GpaV with GpaXIspl induces early larval blockage and controls virulent nematode populations.
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Detail description
Potato cyst nematode Globodera pallida is a major threat to potato crops, yet few resistant varieties exist, all based on Solanum vernei. Two other wild species, S. sparsipilum and S. spegazzinii, share a major resistance QTL named GpaV. S. sparsipilum also carries a minor QTL, GpaXIspl, which when combined with GpaV triggers early necrotic reactions that block larval development. INRA and French breeders created and tested genotypes combining GpaV from different sources with GpaXIspl. Across all combinations, the dual-QTL genotypes showed early nematode arrest and effective control of both experimentally selected and naturally virulent nematode populations, offering a path to broader-spectrum and longer-lasting resistance.
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Contribution detail info
- Project
- Location
- France
- Authors
- Marie-Claire KERLAN, Jean-Paul DANTEC, Lionel RENAULT, Dominique RUER, Catherine SOUCHET, Marie-Ange DANTEC, François MONOT, Josiane QUÉRÉ, Bernard CAROMEL, Laura CHAUVIN, Josselin MONTARRY et Sylvain FOURNET
- Purpose
- Adopt innovative practices
- File type
- document
- Created on
- 01 Márta 2016
- Origin language
- French
- Official project website
- Innovations agronomiques
- License
- CC BY