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Relationship between serum leptin concentrations and the marbling scores in Japanese Black Cattle

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The objective of this study was to investigate the relationship between marbling and serum leptin concentrations. First, we compared serum leptin concentrations between Japanese Black cattle and Holstein calves, and found that the mean serum concentration was significantly higher (P < 0.05) in Japanese Black cattle (2.67 ± 0.41 ng/mL, n = 13) than in Holstein calves (1.79 ± 0.43 ng/mL, n = 5). We then examined the effects of roughage intake or vitamin A on the serum leptin concentrations in Japanese Black cattle. Although the leptin concentrations for the high roughage group were significantly higher than those for the low roughage group at 4, 7 and 20 months old, there was no significant difference in the carcass characteristics of the two groups. In addition, although there was a significant difference in the marbling score between the high vitamin A group and low vitamin A group, there was no significant difference in serum leptin concentrations between the groups. These results suggest that although serum leptin concentrations were not significantly correlated to the marbling scores they may be related to the genetic advantage for marbling in Japanese Black cattle.
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Keywords: Holstein cattle; Japanese Black cattle; leptin; marbling

Document Type: Research Article

Affiliations: 1: Graduate School of Agriculture, Tohoku University, Aoba-ku, Sendai-shi, 2: Hyogo Prefectural Agricultural Institute, Kasai-shi and 3: Hyogo Prefectural Hokubu Agricultural Institute, Wadayama-machi, Hyogo-ken, Japan

Publication date: February 1, 2002

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