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- Title
Modeling tenderness for genetic and quantitative trait loci analyses.
- Authors
Chang, L. Y.; Pitchford, W. S.; Bottema, C. D. K.
- Abstract
Tenderness is the one of the most important attributes of beef with regards to the intent of consumers to repurchase. Beef tenderness is frequently measured objectively as Warner-Bratzler shear force. However, to better understand the genetics underlying tenderness, better descriptors were derived herein. Two traits, adjusted shear force and aging rate, were calculated to incorporate measures of Warner-Bratzler shear force repeated over aging time of 2 muscles, longissimus dorsi (LD) and semitendinosus (ST). Analysis of these traits indicated that the shear forces of the 2 muscles are lowly correlated and aging rate, as calculated, was not correlated with adjusted shear force. Breed, SNP, and QTL effects were analyzed for the 4 traits (2 traits X 2 muscles). For adjusted shear force, the QTL were located on cattle chromosomes BTA 5, 18, 25, and 29. With the exception of the QTL on BTA 5, the adjusted shear force QTL were observed for either the LD or the ST but not both muscles. The QTL for aging rate were located on BTA 1, 4, 7, 11, 13, 19, and 20.
- Subjects
BEEF cattle behavior; ERECTOR spinae muscles; BEEF cattle breeding; SINGLE nucleotide polymorphisms; CONSUMER attitudes; SHEARING force; CATTLE genetics; BEEF cattle
- Publication
Journal of Animal Science, 2014, Vol 92, Issue 1, p39
- ISSN
0021-8812
- Publication type
Article
- DOI
10.2527/jas.2013-6696