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https://hdl.handle.net/2440/112429
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Type: | Journal article |
Title: | Vitamin A and marbling attributes: intramuscular fat hyperplasia effects in cattle |
Author: | Kruk, Z. Bottema, M. Reyes-Veliz, L. Forder, R. Pitchford, W. Bottema, C. |
Citation: | Meat Science, 2018; 137:139-146 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 0309-1740 1873-4138 |
Statement of Responsibility: | Z.A. Kruk, M.J. Bottema, L. Reyes-Veliz, R.E.A. Forder, W.S. Pitchford, C.D.K. Bottema |
Abstract: | Twenty Angus steers were fed a diet low in β-carotene and vitamin A for 10months. Ten steers were supplemented with vitamin A weekly, while the other ten steers did not receive any additional vitamin A. The results demonstrated that the restriction of vitamin A intake increased intramuscular fat (IMF) by 46%. This was a function of the total number of marbling flecks increasing by 22% and the average marbling fleck size increasing by 14%. Vitamin A restriction resulted in marbling flecks that were less branched (22%) and slightly more round (4%) with an increased minor axis length (7%). However, restricting vitamin A did not affect the size of the intramuscular or subcutaneous adipocyte cells or the subcutaneous fat depth. The results suggest that vitamin A affects the amount of marbling and other attributes of the marbling flecks due to hyperplasia rather than hypertrophy. This may explain why vitamin A restriction specifically affects IMF rather than subcutaneous fat deposition. |
Keywords: | Adipocytes Beef Cattle Computer image analysis Intramuscular fat Retinoids |
Rights: | © 2017 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.meatsci.2017.11.024 |
Published version: | http://dx.doi.org/10.1016/j.meatsci.2017.11.024 |
Appears in Collections: | Animal and Veterinary Sciences publications Aurora harvest 8 |
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