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A second mutant allele (V199I) at the PRKAG3 (RN) locus - II. Effect on colour characteristics of pork loin

Lindahl, G; Enfalt, AC; von Seth, G; Josell, Åsa LU ; Hedebro-Velander, I; Andersen, HJ; Braunschweig, M; Andersson, L and Lundstrom, K (2004) In Meat Science 66(3). p.621-627
Abstract
Three alleles at the PRKAG3 (RN) locus that influence the glycogen content of pork were found to be segregating in Hampshire x Landrace crossbred pigs, RN-, rn(+) as well as second mutant allele V 1991 (here denoted rn*). The effect of these three alleles on ultimate pH, pigment content, internal reflectance (FOP), surface colour measured by tristimulus colorimetry (L*, a*, b*) and fractions of deoxymyoglobin (Mb), oxymyoglobin (MbO(2)) and metmyoglobin (MetMb) of pork loin was studied. Moreover, the effect of sex, entire male versus female pigs, on these traits was also analysed. The three PRKAG3 alleles affected ultimate pH, internal reflectance, colour and distribution of myoglobin derivatives of pork loin, while the pigment content was... (More)
Three alleles at the PRKAG3 (RN) locus that influence the glycogen content of pork were found to be segregating in Hampshire x Landrace crossbred pigs, RN-, rn(+) as well as second mutant allele V 1991 (here denoted rn*). The effect of these three alleles on ultimate pH, pigment content, internal reflectance (FOP), surface colour measured by tristimulus colorimetry (L*, a*, b*) and fractions of deoxymyoglobin (Mb), oxymyoglobin (MbO(2)) and metmyoglobin (MetMb) of pork loin was studied. Moreover, the effect of sex, entire male versus female pigs, on these traits was also analysed. The three PRKAG3 alleles affected ultimate pH, internal reflectance, colour and distribution of myoglobin derivatives of pork loin, while the pigment content was not influenced. Ultimate pH values of loins from the three genotypes were found to be in the order RN-/- genotypes < rn(+)/rn(+) genotype < rn(+)/ genotype rn(+)/rn(+) genotype. The internal reflectance in the loin was found to be in the order RN-/- genotypes <rn(+/)rn(+) genotype = rn(+)/rn(+) genotype = rn(+)/rn(+) genotype. The RN- allele was dominant resulting in higher redness (a* value) and yellowness (b* value), while the rn* allele tended to result in lower redness and yellowness compared with the rn* allele. The RN- allele was dominant over the rn* allele in lightness (L* value) giving a lighter colour. Surface colour differences were mainly explained by differences in the distribution of the myoglobin derivatives. Finally, surface lightness was higher and pigment content, redness and fraction of MbO(2) lower in loin from entire males compared with females. (C) 2003 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
myoglobin, colour, pork, hampshire, landrace, genotypes, RN, V199I allele, PRKAG3
in
Meat Science
volume
66
issue
3
pages
621 - 627
publisher
Elsevier
external identifiers
  • wos:000187718700014
  • scopus:0346327152
ISSN
1873-4138
DOI
10.1016/S0309-1740(03)00180-3
language
English
LU publication?
yes
id
4dbed066-9919-46b9-a2e5-4397c4bfa690 (old id 290965)
date added to LUP
2007-08-03 10:59:34
date last changed
2017-12-10 04:34:05
@article{4dbed066-9919-46b9-a2e5-4397c4bfa690,
  abstract     = {Three alleles at the PRKAG3 (RN) locus that influence the glycogen content of pork were found to be segregating in Hampshire x Landrace crossbred pigs, RN-, rn(+) as well as second mutant allele V 1991 (here denoted rn*). The effect of these three alleles on ultimate pH, pigment content, internal reflectance (FOP), surface colour measured by tristimulus colorimetry (L*, a*, b*) and fractions of deoxymyoglobin (Mb), oxymyoglobin (MbO(2)) and metmyoglobin (MetMb) of pork loin was studied. Moreover, the effect of sex, entire male versus female pigs, on these traits was also analysed. The three PRKAG3 alleles affected ultimate pH, internal reflectance, colour and distribution of myoglobin derivatives of pork loin, while the pigment content was not influenced. Ultimate pH values of loins from the three genotypes were found to be in the order RN-/- genotypes &lt; rn(+)/rn(+) genotype &lt; rn(+)/ genotype rn(+)/rn(+) genotype. The internal reflectance in the loin was found to be in the order RN-/- genotypes &lt;rn(+/)rn(+) genotype = rn(+)/rn(+) genotype = rn(+)/rn(+) genotype. The RN- allele was dominant resulting in higher redness (a* value) and yellowness (b* value), while the rn* allele tended to result in lower redness and yellowness compared with the rn* allele. The RN- allele was dominant over the rn* allele in lightness (L* value) giving a lighter colour. Surface colour differences were mainly explained by differences in the distribution of the myoglobin derivatives. Finally, surface lightness was higher and pigment content, redness and fraction of MbO(2) lower in loin from entire males compared with females. (C) 2003 Elsevier Ltd. All rights reserved.},
  author       = {Lindahl, G and Enfalt, AC and von Seth, G and Josell, Åsa and Hedebro-Velander, I and Andersen, HJ and Braunschweig, M and Andersson, L and Lundstrom, K},
  issn         = {1873-4138},
  keyword      = {myoglobin,colour,pork,hampshire,landrace,genotypes,RN,V199I allele,PRKAG3},
  language     = {eng},
  number       = {3},
  pages        = {621--627},
  publisher    = {Elsevier},
  series       = {Meat Science},
  title        = {A second mutant allele (V199I) at the PRKAG3 (RN) locus - II. Effect on colour characteristics of pork loin},
  url          = {http://dx.doi.org/10.1016/S0309-1740(03)00180-3},
  volume       = {66},
  year         = {2004},
}