|Tait Jr, Richard|
|King, David - Andy|
|Thallman, Richard - Mark|
|Smith, Timothy - Tim|
Submitted to: Beef Improvement Federation Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 5/31/2016
Publication Date: 6/14/2016
Citation: Tait Jr, R.G., Shackelford, S.D., Wheeler, T.L., King, D.A., Keele, J.W., Casas, E., Thallman, R.M., Smith, T.P., Bennett, G.L. 2016. Selection enhanced estimates of marker effects on means and variances of beef tenderness. In proceedings: 2016 Beef Improvement Federation Annual Meeting & Symposium. Manhattan, KS, Jun 14-17, 2016. pp. 115-121. www.beefimprovement.org/library-2/convention-proceedings.
Technical Abstract: Genetic marker associations from surveys of industry cattle populations have low frequencies of rare homozygous animals. Selection for calpain (CAPN1) and calpastatin (CAST) genetic markers was replicated in two cattle populations (Angus and MARC III) at the U.S. Meat Animal Research Center. These markers were found to both have additive modes of inheritance without interaction between CAPN1 and CAST. Additionally, analyses of these populations identified a novel genetic effect of CAST genotype specific residual variance models fitting significantly better than single residual variance models (P < 0.001) in both populations with progressive action of the most tender genotype being the least variable and most tough genotype being the most variable as well.