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http://dx.doi.org/10.5713/ajas.17.0672

Fatty acid composition of goose meat depending on genotype and sex  

Uhlirova, Linda (Department of Animal Husbandry, Czech University of Life Sciences Prague)
Tumova, Eva (Department of Animal Husbandry, Czech University of Life Sciences Prague)
Chodova, Darina (Department of Animal Husbandry, Czech University of Life Sciences Prague)
Volek, Zdenek (Department of Physiology of Nutrition and Product Quality, Institute of Animal Science)
Machander, Vlastislav (International Poultry Testing, Ustrasice)
Publication Information
Asian-Australasian Journal of Animal Sciences / v.32, no.1, 2019 , pp. 137-143 More about this Journal
Abstract
Objective: The aim of this study was to compare male and female geese of two contrasting genotypes in terms of fatty acid composition, indexes related to human health, lipid metabolism and oxidative stability of the meat. Methods: The experiment was carried out on total of 120 geese of two different genotypes; the native breed Czech goose (CG) and commercial hybrid Novohradska goose (NG). One-d-old goslings were divided into 4 groups according to genotype and sex, and 8 birds from each group were slaughtered at 8 weeks of age. Results: The effects of the interactions between genotype and sex were observed on growth performance and carcass traits. Final body weight (p<0.001), daily weight gain (p<0.001), daily feed intake (p<0.001), slaughter weight (p<0.001), and cold carcass weight (p<0.001) were highest in NG males and lowest in CG females. The meat fatty acid composition results showed effects of both genotype and sex on the total n-6 and the total polyunsaturated fatty acid (PUFA) content, as well as the PUFA n-6/PUFA n-3 ratio. Regarding genotype, the total n-6, the total PUFA content and the PUFA n-6/PUFA n-3 ratio were higher in CG, and higher values were found in females. In terms of the lipid metabolism, ${\Delta}^5-{\Delta}^6$ desaturase (p = 0.006) was higher in males. The meat oxidative stability results revealed an interaction between genotype, sex and storage time (p<0.001). The highest (13.85 mg/kg) malondialdehyde content was measured in the meat of CG females after 5 days of storage and was presumably related to a higher PUFA content. Conclusion: NG had a relatively higher growth rate and meat oxidative stability, whereas the advantage of CG meat is its favourable fatty acid profile characterized by a higher PUFA content.
Keywords
Genotype; Fatty Acid Composition; Sex; Lipid Metabolism; Oxidative Stability;
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