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Search Results: 1 - 10 of 4731 matches for " Beaumont Catherine "
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Genetic control of resistance to salmonellosis and to Salmonella carrier-state in fowl: a review
Fanny Calenge, Pete Kaiser, Alain Vignal, Catherine Beaumont
Genetics Selection Evolution , 2010, DOI: 10.1186/1297-9686-42-11
Abstract: Salmonellosis is a zoonotic disease caused by the Gram-negative enteric bacterium Salmonella. More than 2500 serotypes have been described, mostly belonging to the species S. enterica [1]. Some Salmonella serotypes can infect a broad range of domestic animals including poultry, sheep, cattle and pigs and cause symptoms of varying severity ranging from mild gastro-enteritis to death. Some of these serotypes, such as S. Typhimurium and S. Enteritidis, can infect humans. Other serotypes are host-specific, infecting a single species and generally causing severe, typhoid-like symptoms sometimes leading to death (for instance, S. Gallinarum and S. Pullorum in poultry). These serotypes can be responsible for disease outbreaks leading to severe economic losses.Prophylactic measures, vaccination and use of antibiotics are insufficient to eradicate salmonellosis in poultry stocks, whatever the serotype involved. In this context, selection of more resistant chickens can be considered as an alternative solution to decrease occurrence of the disease. The first selection experiments at the beginning of the 20th century aimed to decrease disease occurrence in poultry production systems, which was mainly caused by S. Pullorum and S. Gallinarum. As food safety became an important concern and these host-specific serotypes were better controlled, the interest of researchers and breeders extended towards decreasing food contamination, mainly due to the serotypes Enteritidis and Typhimurium. S. Enteritidis alone, which infects the eggs of contaminated hens, is responsible for one third of the human food poisoning cases in France [2] and of about 15% in the UK in 2007 http:/ / www.defra.gov.uk/ foodfarm/ farmanimal/ diseases/ atoz/ zoonoses/ reports.htm webcite. It does not cause severe symptoms in poultry, but the eggs and meat of infected animals can become a reservoir of infection for the human consumer. In particular, asymptomatic carriers have a major role in Salmonella propagation
Genetic parameters of body weight and prolificacy in pigeons
Sandrine Mignon-Grasteau, Léa Lescure, Catherine Beaumont
Genetics Selection Evolution , 2000, DOI: 10.1186/1297-9686-32-4-429
Abstract: (To access the full article, please see PDF)
Estimation of the genetic parameters of sexual dimorphism of body weight in 'label' chickens and Muscovy ducks
Sandrine Mignon-Grasteau, Catherine Beaumont, Jean-Paul Poivey, Hubert de Rochambeau
Genetics Selection Evolution , 1998, DOI: 10.1186/1297-9686-30-5-481
Genotype by environment interactions in relation to growth traits in slow growing chickens
N'Dri Aya,Sellier Nadine,Tixier-Boichard Michèle,Beaumont Catherine
Genetics Selection Evolution , 2007, DOI: 10.1186/1297-9686-39-5-513
Abstract: Since feed conversion ratio (FCR) is higher in slow-growing "Label Rouge" chickens than in broiler chickens, it is important to work on its improvement in this breed. However, this involves rearing animals in cages (C), an environment very different from that used for selection (in floor pens, S) and production (outdoor, E). The aim of this study was to evaluate the importance of genotype by environment (G × E) interactions between S, C, and E environments, to find the best way to select for FCR, using 2002 related animals. Growth curve parameters were estimated and body composition measured. Individual feed conversion ratios (FCR) were recorded between 8 and 10 weeks in C. The presence of G × E interactions was assessed by the genetic correlations between the same trait recorded in different environments. Moderate but significant G × E interactions were detected for carcass traits, a significant one was observed between E and S or C for growth curve parameters but none between C and S. If G × E interactions are set aside, i.e. selecting on traits recorded in C, abdominal fatness is the best indirect selection criterion for FCR but if they are taken in account then leg yield or growth curve parameters in S and growth curve parameters in E are better.
Heritability of susceptibility to Salmonella enteritidis infection in fowls and test of the role of the chromosome carrying the NRAMP1 gene
Odile Girard-Santosuosso, Frédéric Lantier, Isabelle Lantier, Nat Bumstead, Jean-Michel Elsen, Catherine Beaumont
Genetics Selection Evolution , 2002, DOI: 10.1186/1297-9686-34-2-211
Abstract: (To access the full article, please see PDF)
AFLP linkage map of the Japanese quail Coturnix japonica
Odile Roussot, Katia Feve, Florence Plisson-Petit, Frédérique Pitel, Jean-Michel Faure, Catherine Beaumont, Alain Vignal
Genetics Selection Evolution , 2003, DOI: 10.1186/1297-9686-35-6-559
Abstract: (To access the full article, please see PDF)
A maximum likelihood QTL analysis reveals common genome regions controlling resistance to Salmonella colonization and carrier-state
Thanh-Son Tran, Catherine Beaumont, Nigel Salmon, Mark Fife, Pete Kaiser, Elisabeth Duval, Alain Vignal, Philippe Velge, Fanny Calenge
BMC Genomics , 2012, DOI: 10.1186/1471-2164-13-198
Abstract: In our case the QTL analysis method had an important impact on QTL detection. We were able to identify new genomic regions controlling resistance to carrier-state, in particular by testing the existence of two segregating QTLs. But some of the previously identified QTLs were not confirmed. Interestingly, two QTLs were detected on chromosomes 2 and 3, close to the locations of the major QTLs controlling resistance to colonization and to candidate genes involved in the immune response identified in other, independent studies.Due to the lack of stability of the QTLs detected, we suggest that interesting regions for further studies are those that were identified in several independent studies, which is the case of the QTL regions on chromosomes 2 and 3, involved in resistance to both Salmonella colonization and carrier state. These observations provide evidence of common genes controlling S. Typhimurium colonization and S. Enteritidis carrier-state in chickens.
Restricted maximum likelihood estimation of genetic parameters for the first three lactations in the Montbéliarde dairy cattle breed
C Beaumont
Genetics Selection Evolution , 1989, DOI: 10.1186/1297-9686-21-4-493
A Potentiometric Evaluation of Stability Constants of Two-Step Overlapping Equilibria via a Bilogarithmic Hyperbolic Cosine Method  [PDF]
Samuel Beaumont, Julia Martin, Agustin G. Asuero
Journal of Analytical Sciences, Methods and Instrumentation (JASMI) , 2016, DOI: 10.4236/jasmi.2016.62005
Abstract: A bilogarithmic hyperbolic cosine method for the evaluation of overlapping formation constants at varying (or fixed) ionic strength is devised in this paper and applied to data reported in the analytical literature, i.e. succinic acid system, Cu(II)-glycine system and Ag(I)-aminobutan-1-ol system. The method is based on the linearization of the formation function ? = f(pH) or ? = f(pL) data. A theoretical slope of unity should be obtained thus proving the correctness of the assumed equilibria. An additional advantage of the bilogarithmic method proposed is that it provides a closed scale representation of Y and X unlike other plots. This paper forms part of an investigation into the uses of bilogarithmic methods and hyperbolic functions in parameter estimation. Methods based on the application of spectrophotometric measurements have been the subject of recent studies.
A genome scan for quantitative trait loci affecting the Salmonella carrier-state in the chicken
Pierre Tilquin, Paul A Barrow, José Marly, Frédérique Pitel, Florence Plisson-Petit, Philippe Velge, Alain Vignal, Philippe V Baret, Nat Bumstead, Catherine Beaumont
Genetics Selection Evolution , 2005, DOI: 10.1186/1297-9686-37-6-539
Abstract: (To access the full article, please see PDF)
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