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29e test des terminaux

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Le 29e test met en évidence des différences significatives pour les indices économiques de croissance, de carcasse et de qualité de viande.
2009

2nd International symposium on energy and protein metabolism and nutrition, Vichy, 9-13 september

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Zoom sur quelques résultats récents de la recherche mondiale présentés au Symposium sur les métabolismes énergétique et protéique en nutrition animale organisé par l’INRA à Vichy en septembre 2007, plus particulièrement ceux relatifs à l’alimentation des porcs : gras intramusculaire, teneur en méthionine dans l’aliment post sevrage, iode et engraissement, énergie et insuline en fin de gestation, OMICS...
PDF icon 2nd International symposium on energy and protein metabolism and nutrition, Vichy, 9-13 september
2007

30 ans après : une filière compétitive

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Dans les années 60, avec l'ouverture du marché commun agricole, la production porcine française a été confrondée à des partenaires plus compétitifs. Le déficit apparaît et se creusera durant plusieurs années.

A partir de 1970, plan public et mobilisation professionnelle se mettent en place. Trente ans plus tard et après bien des efforts, la filière porcine de notre pays a progressé dans tous les secteurs. Elle exporte en Europe et dans le monde.

Histoire d'une reconquête...
PDF icon 30 ans après : une filière compétitive
1998

3ème journée d’échanges sur la filière porcine : Scénarios pour la compétitivité de la filière porcine francaise

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Mardi 6 décembre 2016 de 10h à 16h40 -Espace du Centenaire (Maison de la RATP) Paris 12

PDF icon cliquez ici pour télécharger le pdf
2016

40èmes Journées de la Recherche Porcine 5 et 6 février 2008

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Pour les 40 ans du congrès, tous les textes en format PDF publiés depuis 1969 dans les recueils des JRP, ont été mis en ligne sur le site www.journeesrecherche-porcine.com et sont accessibles à tous, par année et session thématique.

Les prochaines Journées de la Recherche Porcine se tiendront à nouveau à Paris les 3 et 4 février 2009.
PDF icon 40èmes Journées de la Recherche Porcine 5 et 6 février 2008
2008

? cual es la importancia real de las enfermedades en el coste de produccion ?

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2007

A 5 year restrospective analysis of the rate of mount refusals among AI-boars

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Refusals to mount or the ejaculate disturb the management of AI centers, and repeated events may compromise productivity or boar longevity.
2012

A co-elaborative tool to assess growing pigs welfare

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Valérie Courboulay et al., 7th International conference on the assessment of animal welfare at farm and group level (WAFL) 5-8 septembre 2017, De ReeHost-Ede, Pays-Bas, poster

Welfare assessment systems are mainly used by external auditors. Better commitment could be achieved if farmers could assess the welfare of their pigs and act to improve it. The French Interprofessional Pork Council is thus developping a project to build an animal welfare assessment tool with and for the farmers.

PDF icon Valérie Courboulay et al., WAFL 2017, 5-8 septembre 2017, De ReeHost - Ede, Pays-Bas
2017

A comparison of vitality and growth performance before weaning of crossbred piglets obtained from Piétrain or crossbred Large White x Piétrain boars and Large White x Landrace sows

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PDF icon A comparison of vitality and growth performance before weaning of crossbred piglets obtained from Piétrain or crossbred Large White x Piétrain boars and Large White x Landrace sows
2007

A dynamic model of ammonia emission and concentration in fattening pig buildings

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visuel d'intervention / workshop
PDF icon A dynamic model of ammonia emission and concentration in fattening pig buildings
2012

A dynamic model of ammonia emission and concentration in fattening pig buildings

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The control of gas emissions from livestock buildings, especially ammonia, is important to limit the environmental impact, which depends primarily on the total emission, and to improve the welfare and health of the animals and the stockmen, which is affected by the concentration in the air. Modelling is an essential tool for a global approach of the different processes involved in the emissions.
PDF icon A dynamic model of ammonia emission and concentration in fattening pig buildings
2007

A field recombinant strain derived from two type 1 porcine reproductive and respiratory syndrome virus (PRRSV-1) modified live vaccines shows increased viremia and transmission in SPF pigs

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Julie Eclercy et al., Viruses, 2019, 23 mars, volume 11, n° 3, 13 pages

In Europe, modified live vaccines (MLV) are commonly used to control porcine reproductive and respiratory syndrome virus (PRRSV) infection. However, they have been associated with safety issues such as reversion to virulence induced by mutation and/or recombination. On a French pig farm, we identified a field recombinant strain derived from two PRRSV-1 MLV (MLV1). As a result, we aimed to evaluate its clinical, virological, and transmission parameters in comparison with both parental strains. Three groups with six pigs in each were inoculated with either one of the two MLV1s or with the recombinant strain; six contact pigs were then added into each inoculated group. The animals were monitored daily for 35 days post-inoculation (dpi) for clinical symptoms; blood samples and nasal swabs were collected twice a week. PRRS viral load in inoculated pigs of recombinant group was higher in serum, nasal swabs, and tonsils in comparison with both vaccine groups. The first viremic contact pig was detected as soon as 2 dpi in the recombinant group compared to 10 and 17 dpi for vaccine groups. Estimation of transmission parameters revealed fastest transmission and longest duration of infectiousness for recombinant group. Our in vivo study showed that the field recombinant strain derived from two MLV1s demonstrated high viremia, shedding and transmission capacities.

https://www.mdpi.com/1999-4915/11/3/296/pdf

2019

A genetic and functional analysis of innate and adaptive immunity in pigs

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PDF icon A genetic and functional analysis of innate and adaptive immunity in pigs
2010

A genome-wide association study of production traits in a commercial population of Large White pigs: evidence of haplotypes affecting meat quality

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Background
Numerous quantitative trait loci (QTL) have been detected in pigs over the past 20?years using microsatellite markers. However, due to the low density of these markers, the accuracy of QTL location has generally been poor. Since 2009, the dense genome coverage provided by the Illumina PorcineSNP60 BeadChip has made it possible to more accurately map QTL using genome-wide association studies (GWAS). Our objective was to perform high-density GWAS in order to identify genomic regions and corresponding haplotypes associated with production traits in a French Large White population of pigs.

Methods
Animals (385 Large White pigs from 106 sires) were genotyped using the PorcineSNP60 BeadChip and evaluated for 19 traits related to feed intake, growth, carcass composition and meat quality. Of the 64 432 SNPs on the chip, 44 412 were used for GWAS with an animal mixed model that included a regression coefficient for the tested SNPs and a genomic kinship matrix. SNP haplotype effects in QTL regions were then tested for association with phenotypes following phase reconstruction based on the Sscrofa10.2 pig genome assembly.

Results
Twenty-three QTL regions were identified on autosomes and their effects ranged from 0.25 to 0.75 phenotypic standard deviation units for feed intake and feed efficiency (four QTL), carcass (12 QTL) and meat quality traits (seven QTL). The 10 most significant QTL regions had effects on carcass (chromosomes 7, 10, 16, 17 and 18) and meat quality traits (two regions on chromosome 1 and one region on chromosomes 8, 9 and 13). Thirteen of the 23 QTL regions had not been previously described. A haplotype block of 183?kb on chromosome 1 (six SNPs) was identified and displayed three distinct haplotypes with significant (0.0001?<?P?<?0.03) associations with all evaluated meat quality traits.

Conclusions
GWAS analyses with the PorcineSNP60 BeadChip enabled the detection of 23 QTL regions that affect feed consumption, carcass and meat quality traits in a LW population, of which 13 were novel QTL. The proportionally larger number of QTL found for meat quality traits suggests a specific opportunity for improving these traits in the pig by genomic selection.

2014

A genome-wide association study points out the causal implication of SOX9 in the sex-reversal phenotype in XX pigs

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Among farm animals, pigs are known to show XX sex-reversal. In such cases the individuals are genetically female but exhibit a hermaphroditism, or a male phenotype. While the frequency of this congenital disease is quite low (less than 1%), the economic losses are significant for pig breeders. These losses result from sterility, urogenital infections and the carcasses being downgraded because of the risk of boar taint. It has been clearly demonstrated that the SRY gene is not involved in most cases of sex-reversal in pigs, and that autosomal recessive mutations remain to be discovered. A whole-genome scan analysis was performed in the French Large-White population to identify candidate genes: 38 families comprising the two non-affected parents and 1 to 11 sex-reversed full-sib piglets were genotyped with the PorcineSNP60 BeadChip. A Transmission Disequilibrium Test revealed a highly significant candidate region on SSC12 (most significant p-value<4.65.10-10) containing the SOX9 gene. SOX9, one of the master genes involved in testis differentiation, was sequenced together with one of its main regulatory region Tesco.
However, no causal mutations could be identified in either of the two sequenced regions. Further haplotype analyses did not identify a shared homozygous segment between the affected pigs, suggesting either a lack of power due to the SNP properties of the chip, or a second causative locus. Together with information from humans and mice, this study in pigs adds to the field of knowledge, which will lead to characterization of novel molecular mechanisms regulating sexual differentiation and dysregulation in cases of sex reversal. 

2013

A herd modelling approach to determine the economically and environmentally most interesting dietary amino acid level during the fattening period

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InraPorc is a model and software tool designed to evaluate the response of pigs to different nutritional strategies. In this study we simulated herd performance using InraPorc to evaluate different feeding strategies in terms of economic performance and environmental impact. A population of 1000 virtual pigs was generated having the same variance-covariance structure of feed intake and growth parameters as those observed in a real population of pigs.
PDF icon A herd modelling approach to determine the economically and environmentally most interesting dietary amino acid level during the fattening period
2009

A influencia das instalaçoes sobre o rendimento da engorda.<br /><br />Influence of installations on fattening yield.

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2007

A la recherche de longes persillées en gras pour des consommateurs « gourmets »

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En France, la production de viande très maigre prédomine. Très peu de longes présentent du gras persillé bien visible à l’oeil. Il existe sans doute un marché pour des productions différenciées, plus riches en gras persillé, avec un plus gustatif.

PDF icon techporc_chevillonb_n23_2015.pdf
2015

A low cost database for the measurement of ammonia and greenhouse gas emissions of animal houses

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visuel d'intervention / workshop
PDF icon A low cost database for the measurement of ammonia and greenhouse gas emissions of animal houses
2012

A PBPK model to study the transfer of α-hexabromocyclododecane (α-HBCDD) to tissues of fast- and slow-growing broilers

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Bertrand Méda (Inrae) et al., Food Additives & Contaminants : Part A, 2020, volume 37, numéro 2, février, p. 316-331

A physiologically based pharmacokinetic (PBPK) model was developed to investigate the production-specific factors involved in the transfer of α-hexabromocyclododecane (α-HBCDD) to broiler meat. The model describes growth and lipid deposition in tissues of fast- (FG) and slow- (SG) growing broilers from hatching to slaughter and simulates the exposure through the ingestion of contaminated feed or expanded polystyrene insulation material. Growth parameters were obtained from the literature while parameters relative to uptake, distribution, and elimination of α-HBCDD were adjusted using results of a previous experiment involving broilers exposed through feed throughout the rearing period or allowed to depurate before slaughter. The model was used to compare the two main edible tissues, breast and leg meat, as well as skin, and to investigate the variability within strain. Between strains and within strain, α-HBCDD assimilation efficiency (AE) is higher when the animals are slaughtered young or heavy. However, increasing slaughter age will lower α-HBCDD concentration in tissues, due to dilution. Based on fresh weight, the concentration of α-HBCDD in breast muscles and skin tends to be lower in SG than in FG broilers (-30 to +10%), while it is 10% to 80% higher in leg muscles. Compared to breast muscles, consuming leg muscles would elicit an exposure 9 and 16 times higher in FG and SG broilers, respectively. The consumption of skin together with muscles would multiply the exposure by up to 36 times compared to breast muscle alone. In case of acute exposure, the α-HBCDD concentration in tissues increased sharply, all the more since the animals are lighter in weight, and then decreased rapidly. In FG broilers, dilution through growth contributed for up to 37%, 28% and 97% to the decontamination of breast muscles, leg muscles and skin, respectively, depending on the duration of depuration before slaughter.

https://www.tandfonline.com/doi/abs/10.1080/19440049.2019.1681596?needAccess=true#aHR0cHM6Ly93d3cudGFuZGZvbmxpbmUuY29tL2RvaS9wZGYvMTAuMTA4MC8xOTQ0MDA0OS4yMDE5LjE2ODE1OTY/bmVlZEFjY2Vzcz10cnVlQEBAMA==

2020

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