Genetic associations of in-line recorded milkability traits and udder conformation with udder health

被引：11

作者：

Carlstrom, C. ^{[1
]}

Strandberg, E. ^{[1
]}

Johansson, K. ^{[2
]}

Pettersson, G. ^{[3
]}

Stalhammar, H. ^{[4
]}

Philipsson, J. ^{[1
]}

机构：

[1] Swedish Univ Agr Sci, Dept Anim Breeding & Genet, Uppsala, Sweden

[2] Vaxa Sverige, Uppsala, Sweden

[3] Swedish Univ Agr Sci, Dept Anim Nutr & Management, Uppsala, Sweden

[4] Viking Genet, Skara, Sweden

来源：

ACTA AGRICULTURAE SCANDINAVICA SECTION A-ANIMAL SCIENCE | 2016年 / 66卷 / 02期

关键词：

Milking speed; somatic cell count; clinical mastitis; udder conformation; SOMATIC-CELL SCORE; AUTOMATIC MILKING SYSTEMS; CLINICAL MASTITIS; PARAMETERS; COWS; HOLSTEINS;

D O I：

10.1080/09064702.2016.1260154

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Milkability and udder conformation traits of Swedish Holstein (SH) and Swedish Red (SR) cows from 93 herds with automatic milking systems or conventional milking parlors were used to study genetic relationships to lactation average somatic cell score (LSCS) and incidence of clinical mastitis (CM). Estimated genetic correlations between measures of milking speed (average flow rate, milking time and box time) and LSCS ranged between 0.29 and 0.57 and showed that high milking speed is associated with increasing LSCS. Regressions indicated a curvilinear relationship. Genetic correlations between milking speed and CM showed similar values as for LSCS in SH cows, but were inconsistent in SR cows. Shallow udder and strong fore udder attachment were consistently correlated with good udder health. The unfavorable relationships between milking speed and udder health traits should be considered together with a few udder conformation traits when selecting for better milkability.

引用

页码：84 / 91

页数：8

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