Data from a purebred Landrace resource population, developed to represent current U.S. breed genetic and phenotypic diversity, were utilized to derive restricted maximum likelihood estimates of genetic parameters using single and multiple trait animal models for days to 113.4 kg (DAYS), 10th rib backfat (BF) and loin muscle area (LMA), subjective color and marbling, 24 h postmortem pH (pH24 h), Minolta color (L*, a*, and b*), purge loss (PURGE), cook loss (CLOSS), intramuscular fat (IMF), and Warner-Bratzler shear force (WBS). Heritability estimates were high (≥0.59) for BF and LMA; moderate (0.19 to 0.47) for IMF, color, L*, a*, WBS, DAYS, pH24 h, and marbling; and low (≤0.06) for b*, CLOSS, and PURGE. Genetic correlations between composition and meat quality traits were generally antagonistic while genetic correlations among meat quality traits were generally favorable in direction.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 06.40, 2006
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