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A canonical correlation analysis of the association between carcass and ham traits in pigs used to produce dry-cured ham Genet. Mol. Biol.
Ventura,Henrique T.; Lopes,Paulo S.; Peloso,José V.; Guimarães,Simone E.F.; Carneiro,Antonio Policarpo S.; Carneiro,Paulo L.S..
The association between carcass and ham traits in a pig population used to produce dry-cured ham was studied using canonical correlation analysis. The carcass traits examined were hot carcass weight (HCW), backfat thickness (BT) and loin depth (LD), and the ham traits studied were gross ham weight (GHW), trimmed ham weight (THW), ham inner layer fat thickness (HIFT), ham outer layer fat thickness (HOFT), pH (pH) and the Göfo value. Carcass and ham traits are not independent. The canonical correlations (r) between the carcass and ham traits at 130 kg were 0.77, 0.24 and 0.20 for the first, second and third canonical pair, respectively, and were all significant (p < 0.01) by the Wilks test. The corresponding canonical correlations between the three...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canonical correlation; Carcass; Ham; Pig.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300014
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Expression profile of genes associated with mastitis in dairy cattle Genet. Mol. Biol.
Fonseca,Isabela; Silva,Priscila Vendramini; Lange,Carla Christine; Guimarães,Marta F.M.; Weller,Mayara Morena Del Cambre Amaral; Sousa,Katiene Régia Silva; Lopes,Paulo Sávio; Guimarães,José Domingos; Guimarães,Simone E.F..
In order to characterize the expression of genes associated with immune response mechanisms to mastitis, we quantified the relative expression of the IL-2, IL-4, IL-6, IL-8, IL-10, IFN-γ and TNF-α genes in milk cells of healthy cows and cows with clinical mastitis. Total RNA was extracted from milk cells of six Black and White Holstein (BW) cows and six Gyr cows, including three animals with and three without mastitis per breed. Gene expression was analyzed by real-time PCR. IL-10 gene expression was higher in the group of BW and Gyr cows with mastitis compared to animals free of infection from both breeds (p < 0.05). It was also higher in BW Holstein animals with clinical mastitis (p < 0.001), but it was not significant when Gyr cows with and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cytokine; Gene expression; Immune response; Real-time PCR.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400018
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Fine mapping and single nucleotide polymorphism effects estimation on pig chromosomes 1, 4, 7, 8, 17 and X Genet. Mol. Biol.
Hidalgo,André M.; Lopes,Paulo S.; Paixão,Débora M.; Silva,Fabyano F.; Bastiaansen,John W.M.; Paiva,Samuel R.; Faria,Danielle A.; Guimarães,Simone E.F..
Fine mapping of quantitative trait loci (QTL) from previous linkage studies was performed on pig chromosomes 1, 4, 7, 8, 17, and X which were known to harbor QTL. Traits were divided into: growth performance, carcass, internal organs, cut yields, and meat quality. Fifty families were used of a F2 population produced by crossing local Brazilian Piau boars with commercial sows. The linkage map consisted of 237 SNP and 37 microsatellite markers covering 866 centimorgans. QTL were identified by regression interval mapping using GridQTL. Individual marker effects were estimated by Bayesian LASSO regression using R. In total, 32 QTL affecting the evaluated traits were detected along the chromosomes studied. Seven of the QTL were known from previous studies using...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bayesian LASSO Piau breed pig genetics; QTL.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400009
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Genomic growth curves of an outbred pig population Genet. Mol. Biol.
Silva,Fabyano Fonseca e; Resende,Marcos Deon V. de; Rocha,Gilson Silvério; Duarte,Darlene Ana S.; Lopes,Paulo Sávio; Brustolini,Otávio J.B.; Thus,Sander; Viana,José Marcelo S.; Guimarães,Simone E.F..
In the current post-genomic era, the genetic basis of pig growth can be understood by assessing SNP marker effects and genomic breeding values (GEBV) based on estimates of these growth curve parameters as phenotypes. Although various statistical methods, such as random regression (RR-BLUP) and Bayesian LASSO (BL), have been applied to genomic selection (GS), none of these has yet been used in a growth curve approach. In this work, we compared the accuracies of RR-BLUP and BL using empirical weight-age data from an outbred F2 (Brazilian Piau X commercial) population. The phenotypes were determined by parameter estimates using a nonlinear logistic regression model and the halothane gene was considered as a marker for evaluating the assumptions of the GS...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bayesian LASSO; Nonlinear regression; SNP effects.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400010
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Quantitative trait loci for carcass, internal organ and meat quality traits on porcine chromosomes 16, 17 and 18 Genet. Mol. Biol.
Paixão,Débora M.; Silva Filho,Miguel I. da; Pereira,Mário S.; Lopes,Marcos S.; Barbosa,Leandro; Souza,Katiene Régia Silva; Lopes,Paulo S.; Guimarães,Simone E.F..
The objective of this study was to map quantitative trait loci (QTL) on porcine chromosomes 16, 17 and 18 and to determine their association with carcass, organ and meat quality traits. An F2 population was produced by crossing two boars of the naturalized Brazilian Piau breed with 18 commercial females (Landrace x Large White x Pietrain). The population was genotyped for 11 microsatellite markers distributed over the three chromosomes and the results were used to construct a marker-specific linkage map for the population. Analysis of the polymorphic information content showed that the microsatellite markers were adequate for the study of quantitative traits. QTL were identified by regression interval mapping using QTL Express software. QTL not previously...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Divergent crosses; Microsatellite markers; Pig production; QTL mapping.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500016
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