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ARS Home » Plains Area » Clay Center, Nebraska » U.S. Meat Animal Research Center » Genetics, Breeding, and Animal Health Research » Research » Publications at this Location » Publication #329293

Research Project: GENETIC RESEARCH TO ENHANCE EFFICIENT AND SUSTAINABLE PRODUCTION OF BEEF CATTLE AND SHEEP

Location: Genetics, Breeding, and Animal Health Research

Title: Selection enhanced estimates of marker effects on means and variances of beef tenderness

Author
item Tait Jr, Richard
item Shackelford, Steven
item Wheeler, Tommy
item King, David - Andy
item Keele, John
item Casas, Eduardo
item Thallman, Richard - Mark
item Smith, Timothy - Tim
item Bennett, Gary

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.

Interpretive Summary:

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.