J. Anim Sci.
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J. Anim Sci. 1962. 21:848-851.
© 1962 American Society of Animal Science
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Influence of Marbling and Animal Age on Factors Associated with Beef Quality1,2,3,4,

H. J. Tuma5, R. L. Henrickson, D. F. Stephens and Ruby Moore

Oklahoma Agriculaural Experiment Station, Stillwater

Abstract

The longissimus dorsi muscle from the loins of 24 Hereford steers and females, 18, 42, and 90-month of age, was studied. The marbling of each carcass was or closely approached either a "slight amount" or "slightly abundant" level. Tenderness of the longissimus dorsi steaks, as measured by the Warner-Bratzler shear and panel tenderness, decreased significantly with increasing animal age. The greatest difference in tenderness was observed between the 18- and 42-month-old animals. The association between marbling and tenderness varied with animal age. "slightly abundant" marbling, as compared to a "slight amount" of marbling, did not enhance the tenderness of steaks from the 18-month-old animals. The more tender steaks from the 42- and 90-month-old animals, however, were associated with the "slightly abundant" marbling level.

The effect of aging 14-days varied with animal age, marbling level, and the method of measuring tenderness. Steaks from the 18-month-old animals were influenced little by aging, while those from the 42- and 90-month-old animals were scored more tender by the taste panel after aging 14-days. Measured by the Warner-Bratzler shear, this tenderizing effect of 14-days aging was non-significant. A significant increase in Ph, predominantly in the "slight amount" level marbled cattle 42- and 90-months of age, was noted upon aging 14-days.

Taste panel flavor and juiciness scores did not appear to be related to animal age, marbling level, or aging 14-days. Marbling in the steaks did not significantly influence any of the three dimensions of color.

Footnotes

1 Presented before the 53rd Annual Meeting of the American Society of Animal Production, Chicago, Illinois, November 24, 1961.

2 Journal Series Paper No. 744 approved by the Director of the Oklahoma Agricultural Experiment Station.

3 Financed in part by the U.S.D.A. under the Research and Marketing Act, Contract No. 12-25-010-576.

4 The authors express gratitude to Kenneth Urban, Paul Wuthier, and George Odell for able technical assistance and to Robert D. Morrison for the statistical guidance.

5 Present Address: Animal Husbandry Department, South Dakota State College, Brookings, South Dakota.




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R. W. Purchas, D. L. Burnham, and S. T. Morris
Effects of growth potential and growth path on tenderness of beef longissimus muscle from bulls and steers
J Anim Sci, December 1, 2002; 80(12): 3211 - 3221.
[Abstract] [Full Text] [PDF]


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