Advanced search
1 file | 564.59 KB

Genetic parameters for intramuscular fatty acid composition and metabolism in pigs

(2010) JOURNAL OF ANIMAL SCIENCE. 88(4). p.1286-1294
Author
Organization
Abstract
The aim of this study was to estimate genetic parameters for pork intramuscular fatty acid (FA) composition and indices for desaturase and elongase activities involved in n-3 and n-6 PUFA metabolism. The LM of 437 slaughter pigs was analyzed for FA composition (expressed as g/100 g of FA). Indices for enzyme activities were calculated from product to precursor FA ratios. Genetic parameters were estimated with single- and multi-trait animal models. The total FA content, reflecting the intramuscular fat content, was either included or not in the model. Results from the models without total FA content showed relatively high heritability estimates, generally above 0.50, for the proportion of the most important MUFA and PUFA, compared with much smaller values for the SFA. When total FA content was included in the models, heritability values decreased (P < 0.001) for most individual FA and for all sums of FA groups, except for C18:0, C18:3n-6, and C18:3n-3. Heritability estimates for the ratios C20:4n-6/C18:2n-6 and C22:6n-3/C18:3n-3, reflecting the overall conversion in the n-6 and n-3 PUFA pathway, respectively, were 0.29 and 0.35, respectively, with total FA content in the model and increased to 0.38 and 0.49, respectively, if total FA content was not in the model. Heritabilities for other more specific indices were of the same order. Genetic correlations between PUFA proportions and indices for enzyme activities with ADG were mostly negative, whereas the correlations with carcass lean meat percentage were mostly positive. It was concluded that there is meaningful genetic variation for long-chain PUFA metabolism that is only partly dependent on the carcass and muscle fat content. This may allow selection for improved FA composition of pork.
Keywords
DEPOSITION, GENOTYPE, TISSUES, DUROC, TRAITS, fatty acid, MUSCLE, MEAT QUALITY, CARCASS COMPOSITION, EATING QUALITY, CONJUGATED LINOLEIC-ACID, pig, polyunsaturated fatty acid, intramuscular fat, heritability, genetic correlation

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 564.59 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Ntawubizi, Martin, Ellen Colman, S Janssens, Katleen Raes, Nadine Buys, and Stefaan De Smet. 2010. “Genetic Parameters for Intramuscular Fatty Acid Composition and Metabolism in Pigs.” Journal of Animal Science 88 (4): 1286–1294.
APA
Ntawubizi, Martin, Colman, E., Janssens, S., Raes, K., Buys, N., & De Smet, S. (2010). Genetic parameters for intramuscular fatty acid composition and metabolism in pigs. JOURNAL OF ANIMAL SCIENCE, 88(4), 1286–1294.
Vancouver
1.
Ntawubizi M, Colman E, Janssens S, Raes K, Buys N, De Smet S. Genetic parameters for intramuscular fatty acid composition and metabolism in pigs. JOURNAL OF ANIMAL SCIENCE. 2010;88(4):1286–94.
MLA
Ntawubizi, Martin, Ellen Colman, S Janssens, et al. “Genetic Parameters for Intramuscular Fatty Acid Composition and Metabolism in Pigs.” JOURNAL OF ANIMAL SCIENCE 88.4 (2010): 1286–1294. Print.
@article{915465,
  abstract     = {The aim of this study was to estimate genetic parameters for pork intramuscular fatty acid (FA) composition and indices for desaturase and elongase activities involved in n-3 and n-6 PUFA metabolism. The LM of 437 slaughter pigs was analyzed for FA composition (expressed as g/100 g of FA). Indices for enzyme activities were calculated from product to precursor FA ratios. Genetic parameters were estimated with single- and multi-trait animal models. The total FA content, reflecting the intramuscular fat content, was either included or not in the model. Results from the models without total FA content showed relatively high heritability estimates, generally above 0.50, for the proportion of the most important MUFA and PUFA, compared with much smaller values for the SFA. When total FA content was included in the models, heritability values decreased (P {\textlangle} 0.001) for most individual FA and for all sums of FA groups, except for C18:0, C18:3n-6, and C18:3n-3. Heritability estimates for the ratios C20:4n-6/C18:2n-6 and C22:6n-3/C18:3n-3, reflecting the overall conversion in the n-6 and n-3 PUFA pathway, respectively, were 0.29 and 0.35, respectively, with total FA content in the model and increased to 0.38 and 0.49, respectively, if total FA content was not in the model. Heritabilities for other more specific indices were of the same order. Genetic correlations between PUFA proportions and indices for enzyme activities with ADG were mostly negative, whereas the correlations with carcass lean meat percentage were mostly positive. It was concluded that there is meaningful genetic variation for long-chain PUFA metabolism that is only partly dependent on the carcass and muscle fat content. This may allow selection for improved FA composition of pork.},
  author       = {Ntawubizi, Martin and Colman, Ellen and Janssens, S and Raes, Katleen and Buys, Nadine and De Smet, Stefaan},
  issn         = {0021-8812},
  journal      = {JOURNAL OF ANIMAL SCIENCE},
  keyword      = {DEPOSITION,GENOTYPE,TISSUES,DUROC,TRAITS,fatty acid,MUSCLE,MEAT QUALITY,CARCASS COMPOSITION,EATING QUALITY,CONJUGATED LINOLEIC-ACID,pig,polyunsaturated fatty acid,intramuscular fat,heritability,genetic correlation},
  language     = {eng},
  number       = {4},
  pages        = {1286--1294},
  title        = {Genetic parameters for intramuscular fatty acid composition and metabolism in pigs},
  url          = {http://dx.doi.org/10.2527/jas.2009-2355},
  volume       = {88},
  year         = {2010},
}

Altmetric
View in Altmetric
Web of Science
Times cited: