博硕论文

Genetics of feed efficiency and feeding behavior in crossbred beef steers with emphasis on genotype-by-environment interactions 收藏

饲料效率和摄食行为的基因型通过与环境的相互作用的杂交肉牛肉牛重点遗传学
原文求助
学校
University of Alberta (Canada)(阿尔伯塔大学（加拿大）)
作者
Durunna, Obioha Nnamdi
关键词
Biological sciences, Feed efficiency, Beef cattle, Residual feed intake
关键词译文
生物科学，饲料效率，肉牛，剩余采食量
发布日期
AI-B 74/04(E), Oct 2013
来源信息
University of Alberta (Canada)，学位：Ph.D.，导师：Wang, Zhiquan, Moore, Stephen, 2011年, 211页
摘要
This study examined whether crossbred steers had different production, feed efficiency and feeding behavior performances when they were fed a grower or finisher diet or both, in successive feeding periods. Major feed efficiency traits were residual feed intake (RFI) and gain to feed ratio (G:F) while feeding behavior traits were feeding duration (FD), head-down time (HDT) and feeding frequency (FF). Some steers received a grower diet in the first feeding period and a finisher diet in the second period (feed-swap); the control groups received only the grower or finisher diet in both periods. Compared to the control groups, about 7% more steers in the feed-swap group changed their RFI performance by 0.5 SD by the second period. Using steers in the feed-swap group (n = 331), the study observed greater (P
摘要译文
本研究杂交肉牛是否有不同的生产，饲料效率和摄食行为的表演时，他们被喂食种植者或装订饮食或两者兼而有之，在连续的饲养周期。主要饲料效率性状残余饵料摄入（RFI）和增益进料之比（G ： F），而摄食行为性状进行喂养持续时间（FD），头下降时间（ HDT）和馈送频率（FF） 。一些阉接收种植者饮食于第一输送期间和装订饮食在第二阶段（进料交换） ;接收到控制组在这两个时期只有种植者或装订的饮食。相比于对照组，供给交换基团在约7 ％25更小公牛改变了他们的RFI性能0.5 SD卡由第二周期。饲料交换组用装载机（ N = 331 ） ，研究观测到的高（P
Durunna, Obioha Nnamdi. Genetics of feed efficiency and feeding behavior in crossbred beef steers with emphasis on genotype-by-environment interactions[D]. CA: University of Alberta (Canada), 2011