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Effects of porcine MC4R and LEPR polymorphisms, gender and Duroc sire line on economic traits in Duroc × Iberian crossbred pigs.

Meat Sci.2011 May;88(1):169-73. Epub 2010 Dec 10
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摘要


Polymorphisms MC4R c.1426 A>G (p.Asp298Asn) and LEPR c.2002 C>T (p.Leu663Phe) have been associated in pigs with feed intake, growth and fatness. Our aims were to analyze how these polymorphisms influence production and quality traits in Duroc × Iberian crossbred pigs, and moreover evaluate how the effects of gender and Duroc line were affecting these traits. Significant effects of gender, Duroc sire line and LEPR c.2002 C>T mutation, were detected on the main traits. LEPR c.2002 T allele increased body weight (2.5 ± 0.7 kg), backfat thickness (1.5 ± 0.4mm), loin intramuscular fat (0.7 ± 0.2 %), and lightness (1.0 ± 0.3); however it was decreasing premium cuts yield (-0.9 ± 0.2%). Allele c.2002 T increased SFA (0.60 ± 0.12 %), and decreased MUFA (-0.35 ± 0.12%) and PUFA (-0.25 ± 0.06%). No significant effects of MC4R c.1426 A>G SNP were identified. A genetic test based on the LEPR c.2002 C>T SNP may be useful to select Duroc sires to reduce undesirable heterogeneity of carcasses and premium cuts of crossbred animals.

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