Molecular Plant-Microbe Interactions (2005) 18, 1186-1194

Bernard Caromel, Didier Mugniéry, Marie-Claire Kerlan, Sandra Andrzejewski, Alain Palloix, Daniel Ellissèche, Françoise Rousselle-Bourgeois and Véronique Lefebvre (2005)
Resistance quantitative trait loci originating from Solanum sparsipilum act independently on the sex ratio of Globodera pallida and together for developing a necrotic reaction
Molecular Plant-Microbe Interactions 18 (11), 1186-1194
Abstract: Plant resistance to nematodes is related to the ability of the host to reduce the development of nematode juveniles into females. Resistance to the potato cyst nematode (PCN) Globodera pallida, originating from the wild species Solanum sparsipilum, was dissected by a quantitative trait loci (QTL) approach. Two QTL explained 89% of the phenotypic variation. The QTL GpaV^s_spl on chromosome V displayed the major effect on the cyst number (coefficient of determination (R2 = 76.6%). It restricted G. pallida development to 16.2% of juveniles, 81.5% of males, and 2.3% of females. The QTL GpaXI^s_spl on chromosome XI displayed a lower effect on the cyst number (R2 = 12.7%). It restricted G. pallida development to 13.8% of juveniles, 35.4% of males, and 50.8% of females. Clones carrying both QTL restricted the nematode development to 58.1% juveniles, 41.1% of males, and 0.8% of females. We demonstrated that potato clones carrying both QTL showed a strong necrotic reaction in roots infected by nematodes, while no such reaction was observed in clones carrying a single QTL. This result underlines the importance to introgress together GpaV^s_spl and GpaXI^s_spl into potato cultivars, in order to reduce the density of this quarantine pest in soil and to decrease the risk of selecting overcoming G. pallida subpopulations.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Alain Palloix, Véronique Lefebvre

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
resistance/tolerance/defence of host

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Globodera pallida	Potato (Solanum tuberosum)