Relationship between the Porcine Stress Syndrome gene and pork quality traits of F2 pigs resulting from divergent crosses

Band, Guilherme de Oliveira, Guimarães, Simone Eliza Facioni, Lopes, Paulo Sávio, Schierholt, Alex Sandro, Silva, Kleibe Moraes, Pires, Aldrin Vieira, Benevenuto Júnior, Augusto Aloísio, Gomide, Lúcio Alberto de Miranda

Relationship between the Porcine Stress Syndrome gene and pork quality traits of F2 pigs resulting from divergent crosses

AUTOR(ES)

Band, Guilherme de Oliveira, Guimarães, Simone Eliza Facioni, Lopes, Paulo Sávio, Schierholt, Alex Sandro, Silva, Kleibe Moraes, Pires, Aldrin Vieira, Benevenuto Júnior, Augusto Aloísio, Gomide, Lúcio Alberto de Miranda

FONTE

Genetics and Molecular Biology

DATA DE PUBLICAÇÃO

2005-03

RESUMO

The PSS genotypes of 596 F2 pigs produced by initial mating of Brazilian commercial sows and native boars were characterized by PCR-RFLP and the pork quality traits were evaluated. Among the 596 pigs studied, 493 (82.7%) were NN and 103 (17.3%) were Nn. There were no differences between NN and Nn pigs in the following pork qualities: pHu (5.71 ± 0.16 vs 5.70 ± 0.11), intramuscular fat (1.55 ± 0.64% vs 1.65 ± 0.67%), shear force (5552 ± 878 g/1.2 cm vs 5507 ± 826 g/1.2 cm), lightness (44.96 ± 2.05 vs 45.01 ± 1.92), redness (0.64 ± 0.60 vs 0.79 ± 0.55), yellowness (6.62 ± 0.56 vs 6.65 ± 0.48), hue (84.28 ± 5.53 vs 83.41 ± 4.85), or chroma (6.68 ± 0.52 vs 6.73 ± 0.52). However, pork from Nn pigs had a significantly (p < 0.05) lower pH45 (6.41 ± 0.27 vs 6.51 ± 0.26) and greater drip (3.92 ± 1.90% vs 3.06 ± 1.60%), cooking (33.29 ± 2.26% vs 32.50 ± 2.54%) and total (35.67 ± 2.48% vs 34.01 ± 2.58%) loss compared to that of NN pigs. These results indicate that, even in divergent crosses, PSS gene carriers produce pork of poorer quality.