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The relationships between the performance of Holstein steers and insulin secretion ability

荷斯坦公牛生产性能与胰岛素分泌能力的关系

基本信息

批准号：
05660320
负责人：
HIDAKA Satoshi
金额：
$ 0.96万
依托单位：
Obihiro University of Agriculture and Veterinary Medicine
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05660320/
关键词：
BEEF CATTLE INSULIN MEAT QUARITY MEAT QUANTITY PROPIONATE 屠肉性産肉成績

项目摘要

This study aims at investigating the relationships between the performance of Holstein steers and insulin secretion ability. Holstein steers at three fattening stage were used to investigate the circadian insulin changes and steers at finishing stage were used to investigate the correlation between characteristics of carcass and plasma insulin concentration. And propionate solution (0.625mmol/kg BW) was intravenously injected. The blood was taken for 24hr or at the time of propionate injection. The plasma was separated and determined for plasma insulin concentration. Finishing steers were slaughtered and carcass was measured and graded. The 9-11th rib-eye was analyzed for moisture and crude fat contents.Plasma insulin concentration of finishing steers was higher than that of middle or latter fattening steers. And insulin secretion ability after propionate injection at finishing stage was higher than that at middle or latter fattening stage. There was a positive correlation between circadian insulin change at 25 month of age and trimming fat percentages, but not significant. Plasma insulin concentration after propionate injection tended to correlate positively with carcass weight, but negatively with meat quality and rib-eye crude fat content.In conclusion, the circadian change of insulin concentration was affected by fat accumulation, and insulin secretion ability after propionate injection was correlated with meat quantity.

本研究旨在探讨荷斯坦阉牛生产性能与胰岛素分泌能力之间的关系。以3个育肥期荷斯坦阉牛为研究对象，研究其昼夜胰岛素变化；以肥育期荷斯坦阉牛为研究对象，研究胴体性状与血浆胰岛素浓度的相关性。静脉注射丙酸溶液（0.625mmol/kg BW）。取血24小时或注射丙酸时取血。分离血浆，测定血浆胰岛素浓度。屠宰育肥牛，对胴体进行测量和分级。分析了第9-11肋眼的水分和粗脂肪含量。肥育肉牛血浆胰岛素浓度高于中、后期肥育肉牛。育肥期注射丙酸后的胰岛素分泌能力高于育肥中后期。25月龄时昼夜胰岛素变化与减脂率呈正相关，但不显著。注射丙酸后血浆胰岛素浓度与胴体重呈正相关，与肉质和肋眼粗脂肪含量呈负相关。由此可见，胰岛素浓度的昼夜变化受脂肪积累的影响，注射丙酸后胰岛素分泌能力与肉量相关。