系統が異なる種雄牛から生産された交雑種肉用牛とホルスタイン種乳用牛の血漿中L-カルニチン含量と生産性との関係(<特集>ビタミン測定法の現状と課題[V])

概要

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We investigated the relationship between plasma L-carnitine concentration, at an internally synthesized level, and production performance in 4 strains of hybrid beef cattle and 5 strains of Holstein cows fed under normal conditions, they were sired by different strain bulls. There was no significant difference (P>0.05) in the plasma L-carnitine concentrations, which showed wide variations in both beef cattle and milk cows. Relationship between plasma L-carnitine concentration and body weight gain ratio in each strain of beef cattle tended to be positive regression, with no significance (P>0.05). There was no significant regression between the breeding objective factor and the plasma L-carnitine concentration in Holstein cows. Further verification of the relationship between plasma L-carnitine concentration and strain of cattle needs to be done in future.
2011-10-25