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The effect of the RN¯allele and production system on meat quality and the formation of heterocyclic amines in pork

Olsson, Viktoria (2004). The effect of the RN¯allele and production system on meat quality and the formation of heterocyclic amines in pork. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Agraria, 1401-6249 ; 440
ISBN 91-576-6490-0
[Doctoral thesis]

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This thesis summarises and discusses results of four separate studies on the combined effects of RN genotype and production system on technological and nutritional pig meat quality. That RN genotype considerably affects technological meat quality is well known but little attention has been directed towards potential effects on the nutritional quality of the meat. Mutagenic/carcinogenic heterocyclic amines (HCAs) in fried meat are an important nutritional safety issue and the high muscle glycogen content in RN¯ carriers could affect HCA formation. Further, despite an increased interest in alternative production systems for pig meat there are few and inconsistent reports on meat quality implications. Three animal materials, representing different aspects of alternative production systems, formed the basis for the experimental work. Besides production conditions, RN genotype and sex of the animals were known. The water-holding capacity, colour, texture and chemical composition of the meat were analysed. In two studies the meat was fried and the level of heterocyclic amines formed was determined and in one study the fatty acid composition and the level of the antioxidant α-tocopherol were analysed. In the last study, a questionnaire complemented with colour photographs was used to obtain information on dietary practices and preferences regarding home-prepared pork chops of different RN genotypes. The results stress the importance of combinatory effects of different production factors on final meat quality. Alternative production systems did not have a large impact on final pig meat quality, but in non-carriers of the RN¯ allele organic production with increased physical activity lead to impaired water-holding and texture of the meat. The high glycogen content of meat from RN carriers prevented negative effects of pre-slaughter treatment on meat quality. Free-range reared pigs with access to green feed resulted in more polyunsaturated fatty acids and α-tocopherol in the meat compared to indoor reared pigs. The high glycogen content in carriers of the RN¯ allele led to a browner crust and considerably lower levels of HCAs in fried meat compared to that of non-carriers. It was indicated that pork chops only marginally contribute to the daily intake of HCAs; nonetheless, by choosing meat of carriers of the RN¯ allele and by using lower cooking temperatures, this intake can be further reduced.

Authors/Creators:Olsson, Viktoria
Title:The effect of the RN¯allele and production system on meat quality and the formation of heterocyclic amines in pork
Series Name/Journal:Acta Universitatis Agriculturae Sueciae. Agraria
Year of publishing :February 2004
Number of Pages:70
ALLI. Nilzén V., Babol J., Dutta P.C., Lundeheim N., Enfält A-C., and Lundström, K. 2001. Free-range rearing of pigs with access to pasture grazing – effect on fatty acid composition and lipid oxidation products. Meat Science, 58, 267-275. II. Olsson, V., Solyakov, A., Skog, K, Lundström, K. and Jägerstad, M. 2002. Natural variations of precursors in pig meat affect the yield of heterocyclic amines - Effects of RN genotype, feeding regime and sex. Journal of Agricultural and Food Chemistry, 50: 2962-2969. III. Olsson, V., Andersson, K., Hansson, I. and Lundström, K. 2003. Differences in meat quality between organically and conventionally produced pigs. Meat Science, 64, 287-297. IV. Olsson, V., Skog, K, Lundström, K. and Jägerstad, M. Colour photographs for estimation of heterocyclic amine intake from fried pork chops of different RN genotypes indicate large variations. Accepted for publication in Food Quality and Preference.
Place of Publication:Uppsala
ISBN for printed version:91-576-6490-0
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:Q Food science > Q04 Food composition
Subjects:Not in use, please see Agris categories
Agrovoc terms:heterocyclic compounds, pork, genotypes, sex, free range husbandry, water holding capacity, frying
Keywords:Heterocyclic amines, pig meat, RN genotype, sex, organic, free-range, water-holding capacity, precursors, frying
Permanent URL:
ID Code:467
Department:(NL, NJ) > Dept. of Food Science (until 161231)
Deposited By: Viktoria Olsson
Deposited On:18 Feb 2004 00:00
Metadata Last Modified:22 Jun 2016 06:30

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