Document Detail

A comparison between Holstein-Friesian and Jersey dairy cows and their F1 cross with regard to milk yield, somatic cell score, mastitis, and milking characteristics under grazing conditions.
MedLine Citation:
PMID:  20494183     Owner:  NLM     Status:  MEDLINE    
The key objectives of this study were to investigate differences in milking characteristics and udder health between Holstein-Friesian (HF), Jersey (J), and Jersey x Holstein-Friesian (F(1)) cows and to determine possible associations between milking characteristics and udder health. Records were available from 329 lactations (162 cows): 65 HF, 48J, and 49F(1). Data included lactation mean milk yield, somatic cell score (SCS), incidence of mastitis, average milk flow (AMF), peak milk flow (PMF), and milking duration (MD). Breed group had a significant effect on milk yield and was higher with the HF cows (18.0 kg/d) compared with the J cows (14.2 kg/d). Udder health (SCS and incidence of mastitis at least once during lactation) were similar across the breed groups. Average milk flow was greater with the HF cows (1.36 kg/min) compared with the J cows (1.09 kg/min). Peak milk flow also tended to greater with the HF cows. No difference in MD was observed between the breed groups. The performance of the F(1) cows tended to be similar to the mid-parent (breed) mean for udder health and MD, but heterosis was evident for milk yield, AMF, and PMF. Correlations examined showed that phenotypic milk yield was negatively associated with SCS. Increased milk yield was synonymous with increased AMF, PMF, and MD. Correlations between SCS and milking characteristics were weak. Correlations also showed that cows with low AMF and PMF had extended MD. Therefore, no difference in udder health was observed between HF, J, or F(1) cows. The fact that higher yielding animals exhibit faster milking speeds was confirmed; however, no difference in MD was observed between the breed groups. Such findings indicate that regularity in the milking process will be maintained within mixed-breed herds.
R Prendiville; K M Pierce; F Buckley
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  93     ISSN:  1525-3198     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-05-24     Completed Date:  2010-09-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2741-50     Citation Subset:  IM    
Copyright Information:
2010 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.
Teagasc, Moorepark Dairy Production Research Centre, Fermoy, Co. Cork, Ireland.
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MeSH Terms
Cattle / genetics*
Dairying* / methods
Lactation / genetics*
Mastitis, Bovine / genetics*
Milk / cytology,  secretion*
Quantitative Trait, Heritable

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