Genetic analyses of claw health in Norwegian Red cows

Association of claw disorders with claw horn colour in norwegian red cattle - a cross-sectional study of 2607 cows from 112 herds

Claw disorders cause problems in dairy cattle all over the world. Nutrition, feeding, environment, claw trimming routines, hormonal changes related to calving and genetics are among the factors which influence the pathogenesis. The colour of the claw horn (pigmentation) has been suggested to play a role. The aim of this study was to investigate if there were any associations between the colour ...

Genetic associations between somatic cell score and pathogen-specific subclinical mastitis in Norwegian Red cows.

The aim of this study was to estimate heritabilities of and genetic correlations between pathogen-specific subclinical mastitis (SCM) traits and lactation mean somatic cell score (LSCS) in Norwegian Red cattle. Based on data from 130 733 first-lactation cows four binary pathogen-specific SCM traits, Staphylococcus aureus, Streptococcus dysgalactiae, Streptococcus uberis and coagulase-negative s...

Genetic Achievements of Claw Health by Breeding

Predictive ability of genomic breeding values for corkscrew claw in Norwegian Red

The aim was to predict genomic breeding values (GEBV) for corkscrew claw (CSC) in Norwegian Red and to investigate whether including historical data from a correlated trait improved the predictive ability of GEBV. Corkscrew claw, the most prevalent claw disorder in Norway, has since 2004 been recorded by claw trimmers. Hoof quality (HQ), a feet and leg conformation trait recorded by breeding ad...

Reproductive Performance, Udder Health, and Antibiotic Resistance in Mastitis Bacteria isolated from Norwegian Red cows in Conventional and Organic Farming

BACKGROUND The objectives of this study were to investigate whether there were differences between Norwegian Red cows in conventional and organic farming with respect to reproductive performance, udder health, and antibiotic resistance in udder pathogens. METHODS Twenty-five conventional and 24 organic herds from south-east and middle Norway participated in the study. Herds were matched such ...