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GROWTH,PHYSIOLOGICAL FUNCTION AND MEAT PRODUCTION IN CROSSBRED F_1 OF LIMOUSIN () JAPANESE SHOPTHORN (*) CATTLES

利木赞 (*) *日本山楂 (*) 牛杂交 F_1 的生长、生理功能和产肉量

基本信息

批准号：
07660370
负责人：
YAMAGISHI Toshihiro
金额：
$ 1.41万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

This study was carried out to examine whether an introduction of the germ plasm of Limousin (L) breed was effective or not for improving the growth potential, feed utilization, physiological function and meat production of Japanese Shorthorn (N) cattle.(1) Body weight (BW), daily gain (DG), feed utilization were evaluated for calves of LN,NN and Japanese Black (BB). LN was significantly larger in BW and DG than NN and BB from birth to 12 month of age, but later, there was no difference between them. There were no differences in feed utilizationin between LN and NN at both age of 8 and 16 months.(2) Blood components and circulating levels of hormones (GH,IGF-1, Insulin) were evaluated for calves of LN,NN and BB in the term of grazing and housing, and genetic differences in their traits were determined. In response after feeding of concentrate, LN was higher in levels of cholesterol, trigriceride, glucose, GH and insulin than NN in age of 8 month, but later, there were differences between them only in cholesterol, and glucose.(3) Ultrasonic mesurements of subcutaneous fat thickness were no differences between LN and NN in start of fattening, but after three months, LN was signifficantly larger than NN.(4) Carcass traits were no signifficant differences between LN and NN,but LN tended to be larger in caracass weight and eye muscle and smaller in rib thickness than NN.(5) In fat acid components (%) of four position fat tissues, LN was larger in C18 : 0, and smaller in C18 : 1 than NN,and percentage of saturated fat acid to total fat acid were larger in LN than NN.These results demonstrated that the mating effectiveness of Limousin * to NN * were shown in DG,blood components and hormone levels in earlier growth stage, but there were not effective in the feed utilization and meat production under the Japanese fattening system of much concentrate feeding.

本研究旨在探讨引进利木赞（L）品种种质对于提高日本短角（N）牛的生长潜力、饲料利用率、生理功能和产肉量是否有效。（1）对LN、NN和日本黑牛（BB）犊牛的体重（BW）、日增重（DG）、饲料利用率进行评价。从出生到12月龄，LN在BW和DG中显着大于NN和BB，但以后，两者之间没有差异。 8月龄和16月龄时LN和NN饲料利用率均无差异。(2)对放牧和圈养期间LN、NN和BB犊牛的血液成分和循环激素(GH、IGF-1、胰岛素)水平进行评价,确定其性状的遗传差异。饲喂精料后，8月龄时LN的胆固醇、甘油三酯、葡萄糖、GH和胰岛素水平高于NN，但随后，两者之间仅在胆固醇和葡萄糖方面存在差异。（3）皮下脂肪厚度超声测量LN和NN在育肥开始时没有差异，但3个月后，LN明显大于NN。 (4)胴体性状在LN和NN之间无显着性差异,但LN的胴体重量和眼肌比NN偏大,肋骨厚度比NN偏小。(5)四位脂肪组织的脂肪酸成分(%)中,LN的C18:0大于NN,C18:1小于NN,且饱和脂肪酸占总脂肪酸的比例LN大于NN。 NN.这些结果表明，利木赞*与NN*的交配效果在生长早期的DG、血液成分和激素水平上表现出来，但在日本多精料饲养的育肥体系下，在饲料利用率和产肉方面没有效果。