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United States Department of Agriculture

Agricultural Research Service

Research Project: ENHANCING GENETIC MERIT OF DAIRY CATTLE THROUGH GENOME SELECTION AND ANALYSIS Title: Functional Genomic Analysis of Variation on Beef Tenderness Induced by Acute Stress in Angus Cattle

Authors
item Zhao, Chunping -
item Fei, Tian -
item Yu, Ying -
item Luo, Juan -
item Mitra, Apratim -
item Zhan, Fei -
item Hou, Yali -
item Liu, Ge
item Zan, Linsen -
item Updike, M. Scott -
item Song, Jiuzhou -

Submitted to: Comparative and Functional Genomics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 19, 2012
Publication Date: January 19, 2012
Citation: Zhao, C., Fei, T., Yu, Y., Luo, J., Mitra, A., Zhan, F., Hou, Y., Liu, G., Zan, L., Updike, M., Song, J. 2012. Functional Genomic Analysis of Variation on Beef Tenderness Induced by Acute Stress in Angus Cattle. Comparative and Functional Genomics. DOI: 10.1155/2012/756284.

Interpretive Summary: Beef tenderness is important for its deliciousness, consumer expectation and meat quality. Using microarray, qPCR and bioinformatics analysis, we identified a variety of differentially expressed genes induced by an acute stress. Our results shed lights into the mechanisms that genetic and epigenetic regulations control meat quality and beef tenderness. Farmers, scientist, consumers and policy planners who need improve beef quality and production will benefit from this research.

Technical Abstract: Beef is one of the leading sources of protein, B vitamins, iron and zinc in human food. Beef palatability is based on three general criteria: tenderness, juiciness and flavor, of which tenderness is thought to be the most important factor. In this study, we found that beef tenderness, measured by Warner-Bratzler shear force (WBSF), was dramatically increased by an acute stress. Microarray analysis and qPCR identified a variety of genes that were differentially expressed. Pathway analysis showed that these genes were involved in immune response and regulation of metabolism process as activators or repressors. Further analysis identified that these changes may be related with CpG methylation of several genes. Therefore, the results from this study provide an enhanced understanding of the mechanisms that genetic and epigenetic regulations control meat quality and beef tenderness.

Last Modified: 12/17/2014
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