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Poster De Conférence Année : 2014

Validation of QTL affecting resistance to nematodes in Sheep identified in a Back-Cross design in a pure breed population

Julie Demars
Alessandra Stella
Guillaume Salle Sallé

Résumé

Gastro-intestinal nematodes are of major concern to sheep health worldwide. Identifying the causative genes responsible for resistance would augment the efficiency of selection. Previously, back-cross (BC) sheep (Black Belly * Romane breeds) were genotyped with a 50K SNP chip and were measured for faecal egg count after two successive experimental challenges by H. contortus. The most significant QTL were identified on chromosomes 5, 12, 13, 21. A customized assay including 1000 SNP was created to increase the density ofmarker coverage in these regions and others major QTL regions affecting parasitism resistance in natural infection conditions. In the present study, 277 Romane lambs were experimentally challenged with H contortusand genotyped with the dedicated 1000 SNP. Six out of the eight tested QTL regions have an effect in the Romane pure Breed population.

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Dates et versions

hal-02741411 , version 1 (03-06-2020)

Identifiants

  • HAL Id : hal-02741411 , version 1
  • PRODINRA : 331856

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Carole Moreno-Romieux Moreno, Philippe P. Jacquiet, Frédéric F. Bouvier, Jacques J. Cortet, Alexandra Blanchard-Letort, et al.. Validation of QTL affecting resistance to nematodes in Sheep identified in a Back-Cross design in a pure breed population. 10. World Congress of Genetics Applied to Livestock Production (WCGALP), Aug 2014, Vancouver, Canada. American Society of Animal Science, 2014, Proceedings 10th World Congress of Genetics Applied to Livestock Production (WCGALP). ⟨hal-02741411⟩
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