Luis Varona

Summary

Affiliation: Centre UdL-IRTA
Country: Spain

Publications

  1. doi Bayesian analysis of quantitative traits using skewed distributions
    L Varona
    Genetica i Millora Animal, IRTA Lleida, Av Rovira Roure 191, 25198 Lleida, Spain
    Genet Res (Camb) 90:179-90. 2008
  2. pmc Bayes factors for detection of quantitative trait loci
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, c Rovira Roure 177, 25198 Lleida, Spain
    Genet Sel Evol 33:133-52. 2001
  3. pmc Analysis of litter size and average litter weight in pigs using a recursive model
    Luis Varona
    Genetica i Millora Animal, IRTA, 25198 Lleida, Spain
    Genetics 177:1791-9. 2007
  4. ncbi A whole-genome analysis using robust asymmetric distributions
    Luis Varona
    Area de Produccio Animal, Centre UdL IRTA, Av Rovira Roure 191, 2519 Lleida, Spain
    Genet Res 88:143-51. 2006
  5. ncbi The value of prior information for detection of QTL affecting longitudinal traits: an example using Von Bertalanffy growth function
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, Lleida, Spain
    J Anim Breed Genet 122:37-48. 2005
  6. ncbi A simulation study on the detection of causal mutations from F2 experiments
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, 25198 Lleida, Spain
    J Anim Breed Genet 122:30-6. 2005
  7. ncbi Bayes factor analysis for the genetic background of physiological and vitality variables of F2 Iberian x Meishan newborn piglets
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, 25198 Lleida, Spain
    J Anim Sci 83:334-9. 2005
  8. ncbi Bayesian analysis of quantitative trait loci for boar taint in a Landrace outbred population
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, 25198 Lleida, Spain
    J Anim Sci 83:301-7. 2005
  9. ncbi QTL mapping for growth and carcass traits in an Iberian by Landrace pig intercross: additive, dominant and epistatic effects
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, c Rovira Roure 177, 25198 Lleida, Spain
    Genet Res 80:145-54. 2002
  10. pmc A bi-dimensional genome scan for prolificacy traits in pigs shows the existence of multiple epistatic QTL
    Jose L Noguera
    Genetica i Millora Animal, IRTA Lleida, 25198 Lleida, Spain
    BMC Genomics 10:636. 2009

Detail Information

Publications19

  1. doi Bayesian analysis of quantitative traits using skewed distributions
    L Varona
    Genetica i Millora Animal, IRTA Lleida, Av Rovira Roure 191, 25198 Lleida, Spain
    Genet Res (Camb) 90:179-90. 2008
    ..28 (0.06) for litter size and 0.07 (0.01) for the asymmetry parameter. The posterior mean (standard deviation) of the additive genetic correlation between litter size and the asymmetry parameter was 0.21 (0.07)...
  2. pmc Bayes factors for detection of quantitative trait loci
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, c Rovira Roure 177, 25198 Lleida, Spain
    Genet Sel Evol 33:133-52. 2001
    ..The posterior probability of the QTL model increases as the QTL effect does. The location of the QTL was also correctly obtained. The use of meta-analysis is suggested from the properties of the Bayes factor...
  3. pmc Analysis of litter size and average litter weight in pigs using a recursive model
    Luis Varona
    Genetica i Millora Animal, IRTA, 25198 Lleida, Spain
    Genetics 177:1791-9. 2007
    ....
  4. ncbi A whole-genome analysis using robust asymmetric distributions
    Luis Varona
    Area de Produccio Animal, Centre UdL IRTA, Av Rovira Roure 191, 2519 Lleida, Spain
    Genet Res 88:143-51. 2006
    ..The t-distribution seems more appropriate for describing the distribution of marker effects on backfat depth...
  5. ncbi The value of prior information for detection of QTL affecting longitudinal traits: an example using Von Bertalanffy growth function
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, Lleida, Spain
    J Anim Breed Genet 122:37-48. 2005
    ..On the contrary, when vague priors were used, the procedure was not able to detect QTL...
  6. ncbi A simulation study on the detection of causal mutations from F2 experiments
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, 25198 Lleida, Spain
    J Anim Breed Genet 122:30-6. 2005
    ..Therefore a high percentage of false positives can be expected. The limitations of F2 designs for discriminating between neutral and causal mutations are discussed...
  7. ncbi Bayes factor analysis for the genetic background of physiological and vitality variables of F2 Iberian x Meishan newborn piglets
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, 25198 Lleida, Spain
    J Anim Sci 83:334-9. 2005
    ..82). Posterior modes (means) of heritabilities were 0.29 (0.32) and 0.40 (0.39), respectively. In addition, substantial evidence of absence of genetic background was detected for arterial oxygen saturation at birth...
  8. ncbi Bayesian analysis of quantitative trait loci for boar taint in a Landrace outbred population
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, 25198 Lleida, Spain
    J Anim Sci 83:301-7. 2005
    ..With the detection of a QTL for the fat skatole concentration segregating in this population, marker-assisted selection or even gene-assisted selection could be used once the causal mutation of the QTL was identified...
  9. ncbi QTL mapping for growth and carcass traits in an Iberian by Landrace pig intercross: additive, dominant and epistatic effects
    L Varona
    Area de Produccio Animal, Centre UdL IRTA, c Rovira Roure 177, 25198 Lleida, Spain
    Genet Res 80:145-54. 2002
    ..The results of the bidimensional genomic scan showed that the genetic architecture was mainly additive or the experimental set-up did not have enough power to detect epistatic interactions...
  10. pmc A bi-dimensional genome scan for prolificacy traits in pigs shows the existence of multiple epistatic QTL
    Jose L Noguera
    Genetica i Millora Animal, IRTA Lleida, 25198 Lleida, Spain
    BMC Genomics 10:636. 2009
    ....
  11. pmc Between-groups within-gene heterogeneity of residual variances in microarray gene expression data
    Joaquim Casellas
    Genetica i Millora Animal, IRTA Lleida, 25198 Lleida, Spain
    BMC Genomics 9:319. 2008
    ..Commonly, a homogeneous gene-specific residual variance is assumed in hierarchical mixed models for gene expression data, although it could result in substantial biases if this assumption is not true...
  12. pmc Bayes factor between Student t and Gaussian mixed models within an animal breeding context
    Joaquim Casellas
    Genetica i Millora Animal, IRTA Lleida, 25198 Lleida, Spain
    Genet Sel Evol 40:395-413. 2008
    ..For the analysis of real data (weight of Pietrain pigs at six months), both the Bayes factor and DIC slightly favored the Student t mixed model, with there being a reduced incidence of outlier individuals in this population...
  13. doi Understanding the use of Bayes factor for testing candidate genes
    Luis Varona
    IRTA Lleida, Lleida, Spain
    J Anim Breed Genet 127:16-25. 2010
    ..The results indicate that the Bayes factor procedure is more powerful than the classical approach...
  14. pmc Exploring alternative models for sex-linked quantitative trait loci in outbred populations: application to an iberian x landrace pig intercross
    Miguel Perez-Enciso
    Centre UdL IRTA, Area de Produccio Animal, 25198 Lleida, Spain
    Genetics 161:1625-32. 2002
    ..The analysis suggested that the QTL alleles were fixed in the Iberian founders, whereas there was some evidence of segregation in Landrace for the QTL affecting a* color component...
  15. pmc Bayes factor for testing between different structures of random genetic groups: a case study using weaning weight in Bruna dels Pirineus beef cattle
    Joaquim Casellas
    Grup de Recerca en Remugants, Departament de Ciencia Animal i dels Aliments, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
    Genet Sel Evol 39:39-53. 2007
    ....
  16. pmc A Bayesian analysis of the effect of selection for growth rate on growth curves in rabbits
    Agustin Blasco
    Departamento de Ciencia Animal, Universidad Politecnica de Valencia, PO Box 22012, Valencia 46071, Spain
    Genet Sel Evol 35:21-41. 2003
    ..The other parameters of the Gompertz curve were scarcely affected by selection. When selected and control growth curves are represented in a metabolic scale, all differences disappear...
  17. ncbi Detection of QTL affecting fatty acid composition in the pig
    Alex Clop
    Department de Ciència Animal i dels Aliments, Facultat de Veterinaria, Universitat Autonoma de Barcelona, Bellaterra, 08193, Spain
    Mamm Genome 14:650-6. 2003
    ..This work shows how critical the selection of a covariate can be in the interpretation of results. This is the first report of a genome scan detection of QTL directly affecting fatty acid composition in pigs...
  18. ncbi On growth, fatness, and form: a further look at porcine chromosome 4 in an Iberian x Landrace cross
    Anna Mercadé
    Departament de Ciencia Animal i dels Aliments, Facultat de Veterinaria, Universitat Autonoma de Barcelona, Bellaterra 08193, Spain
    Mamm Genome 16:374-82. 2005
    ..Furthermore, there is also strong evidence of additional loci influencing pH and color in more distant, telomeric positions...
  19. pmc Test for positional candidate genes for body composition on pig chromosome 6
    Cristina Ovilo
    Departamento de Mejora Genética Animal, SGIT INIA, 28040 Madrid, Spain
    Genet Sel Evol 34:465-79. 2002
    ....