Phenotypic and genetic correlations between feeding behaviours and feed efficiency in crossbred beef replacement females

被引：0
作者：
Olson, C. A. [1 ]
Li, C. [1 ,2 ]
Block, H. [2 ]
McKeown, L. [3 ]
Basarab, J. A. [1 ,3 ]
机构：
[1] Univ Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, Canada
[2] Agr & Agri Food Canada, Lacombe Res & Dev Ctr, 6000 C&E Trail, Lacombe, AB T4L 1W1, Canada
[3] Alberta Agr & Forestry, Lacombe Res & Dev Ctr, 6000 C&E Trail, Lacombe, AB T4L 1W1, Canada
来源：
CANADIAN JOURNAL OF ANIMAL SCIENCE | 2020年 / 100卷 / 04期
关键词：
cattle; behaviour (feeding); correlation (genetic); heritability; heifer (replacement); CARCASS MERIT; PERFORMANCE; TRAITS;
D O I：
10.1139/CJAS-2019-0212
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
The objectives of this study were to identify the phenotypic and genetic relationships and heritability (h(2)) of feeding behaviours (FB) in replacement beef females. Between 2005 and 2017, heifers (N = 1394) were tested for feed intake using an electronic feed bunk system. The various FB were feeding duration (DUR; min d(-1)), head down time (HD; min d(-1)), feeding frequency (FREQ; events d(-1)), time-to-bunk (TTB; min). Dry matter intake (DMI; kg d(-1)), and residual feed intake adjusted for off-test ultrasound back fat thickness (RFIFAT) were also reported. The h(2) estimates for DUR, HD, FREQ, TTB, DMI, and RFIFAT were 0.25 +/- 0.05, 0.26 +/- 0.06, 0.27 +/- 0.05, 0.29 +/- 0.06, 0.26 +/- 0.05, and 0.40 +/- 0.07, respectively. These are the first h(2) to be presented for these FB among developing replacement heifers on a high-forage diet.
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页码：781 / 785
页数：5
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[11]   Effects of temperament at feedlot arrival and breed type on growth efficiency, feeding behavior, and carcass value in finishing heifers [J].
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Carstens, Gordon E. ;
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Miller, Rhonda K. .
JOURNAL OF ANIMAL SCIENCE, 2019, 97 (04) :1828-1839
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