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.

引用

页码：781 / 785

页数：5

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