Genetic parameters for residual energy intake and energy conversion efficiency in Nordic Red dairy cattle

被引：21

作者：

Liinamo, A. -E. ^{[1
]}

Mantysaari, P. ^{[2
]}

Lidauer, M. H. ^{[1
]}

Mantysaari, E. A. ^{[1
]}

机构：

[1] Nat Resources Inst Finland, Green Technol, Anim & Plant Genet & Breeding, FIN-31600 Jokioinen, Finland

[2] Nat Resources Inst Finland, Livestock Technol, Green Technol, FIN-31600 Jokioinen, Finland

来源：

ACTA AGRICULTURAE SCANDINAVICA SECTION A-ANIMAL SCIENCE | 2015年 / 65卷 / 02期

关键词：

energy efficiency; heritability; dairy cow; genetic correlation; BODY CONDITION SCORE; RANDOM REGRESSION-MODELS; TOTAL MIXED RATION; DRY-MATTER INTAKE; FEED-INTAKE; PROTEIN RATIO; HOLSTEIN COWS; LIVE WEIGHT; TRAITS; BALANCE;

D O I：

10.1080/09064702.2015.1070897

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Our aim was to estimate the genetic parameters of residual energy intake (REI) and energy conversion efficiency (ECE), and their relationships with milk, feed intake and body weight (BW) and condition in Nordic Red dairy cattle with data from 400 animals. These data were analysed with repeatability and random regression models. The highest heritabilities for energy efficiency traits were obtained in the beginning and the end of the 30 week lactation period (0.21-0.40). The results suggest that the energy efficiencies in early- and mid-lactation periods are partially different traits. The genetic correlations of REI were moderate to high and positive with the other studied traits, and high and positive for ECE with milk, but moderate to low and negative with dry matter intake, BW and body condition score. Further improvements are still needed in modelling the energy efficiency traits of cows during lactation.

引用

页码：63 / 72

页数：10

共 35 条

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