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Genetic parameters for intramuscular fatty acid composition and metabolism in pigs

Martin Ntawubizi UGent, Ellen Colman UGent, S Janssens, Katleen Raes UGent, Nadine Buys and Stefaan De Smet UGent (2010) JOURNAL OF ANIMAL SCIENCE. 88(4). p.1286-1294
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.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
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
journal title
JOURNAL OF ANIMAL SCIENCE
J. Anim. Sci.
volume
88
issue
4
pages
1286 - 1294
Web of Science type
Article
Web of Science id
000275898600009
JCR category
AGRICULTURE, DAIRY & ANIMAL SCIENCE
JCR impact factor
2.58 (2010)
JCR rank
1/54 (2010)
JCR quartile
1 (2010)
ISSN
0021-8812
DOI
10.2527/jas.2009-2355
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
915465
handle
http://hdl.handle.net/1854/LU-915465
date created
2010-03-30 10:59:05
date last changed
2016-12-19 15:40:39
@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},
}

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.