Abstract
Chicken’s ability to carry Salmonella without displaying disease symptoms leads to an invisible propagation of Salmonella in poultry stocks. Using chicken lines more resistant to carrier state could improve both animal health and food safety. Previous studies identified several QTL for resistance to carrier state. To improve genome coverage and QTL detection power we produced a new set of 480 informative SNP markers and genotyped a larger number of animals. Ten additional microchromosomes could be covered when compared with previous studies. These new data led to the identification of 18 QTL significant at the chromosome-wide level. The only QTL significant at the genome-wide level were identified on microchromosomes 14 and 22 and have never been identified previously. Using a higher number of animals improved the power and the precision of QTL detection. Some of the QTL newly identified are located close to candidate genes or microsatellite markers previously identified for their involvement in the genetic control of resistance to Salmonella, which confirms their interest for selection purposes.
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Acknowledgments
SNP markers genotyping was funded by the European project SABRE (Sustainable Animal Breeding; EC number FOOD-CT-2006-01625). Julie Demars was supported by a fellowship from the SABRE project. We thank the Centre National de Génotypage (Evry, France), for providing the SNP information data in the F1 individuals. We thank all members of the team “Signalisation, Portage et Virulence Bactérienne” (INRA, IASP unit, Nouzilly) for the serious and hard work they achieved to phenotype our animals.
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Communicated by L. Andersson.
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Calenge, F., Vignal, A., Demars, J. et al. New QTL for resistance to Salmonella carrier-state identified on fowl microchromosomes. Mol Genet Genomics 285, 237–243 (2011). https://doi.org/10.1007/s00438-011-0600-9
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DOI: https://doi.org/10.1007/s00438-011-0600-9