Duan Q, Tait R G, Schneider M J, Beitz D C, Wheeler T L, Shackelford S D, Cundiff L V, Reecy J M
Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, 313 Kildee Hall, Ames, IA 50011, United States.
Department of Animal Science, Iowa State University, 2255 Kildee Hall, Ames, IA 50011, United States; USDA, ARS, U.S. Meat Animal Research Center, P.O. Box 166, Clay Center, NE 68933, United States.
Meat Sci. 2015 Aug;106:25-30. doi: 10.1016/j.meatsci.2015.03.020. Epub 2015 Mar 30.
The objective of this study was to evaluate sire breed effect on mineral concentration in beef longissimus thoracis (LT) and investigate the correlations between beef mineral concentrations and carcass and palatability traits. Steer progeny (N=246) from the Germplasm Evaluation project-Cycle VIII were used in this study. In addition to carcass traits, LT was evaluated for mineral concentrations, Warner-Bratzler shear force, and palatability traits. A mixed linear model estimated breed effects on mineral concentrations. No significant sire breed (P≥0.43) or dam breed (P≥0.20) effects were identified for mineral concentrations. Pearson correlation coefficients were calculated among mineral concentrations, carcass, and sensory traits. Zinc concentration was positively correlated (P≤0.05) with total iron (r=0.14), heme iron (r=0.13), and magnesium (r=0.19). Significant (P<0.05) correlations were identified between non-heme or heme iron and most traits in this study. Magnesium concentration was correlated with all carcass and palatability traits.
本研究的目的是评估父本品种对牛肉胸最长肌（LT）矿物质浓度的影响，并研究牛肉矿物质浓度与胴体及适口性性状之间的相关性。本研究使用了种质评估项目第八轮的阉牛后代（N = 246）。除了胴体性状外，还对LT的矿物质浓度、沃纳-布拉茨勒剪切力和适口性性状进行了评估。采用混合线性模型估计品种对矿物质浓度的影响。未发现父本品种（P≥0.43）或母本品种（P≥0.20）对矿物质浓度有显著影响。计算了矿物质浓度、胴体和感官性状之间的皮尔逊相关系数。锌浓度与总铁（r = 0.14）、血红素铁（r = 0.13）和镁（r = 0.19）呈正相关（P≤0.05）。本研究中，非血红素铁或血红素铁与大多数性状之间存在显著（P<0.05）相关性。镁浓度与所有胴体和适口性性状相关。
