Genetic Parameters for Milking Duration, Milk Flow and Milk Yield Per Milking in Holstein Dairy Cattle

홀스타인 착유우의 착유시간, 착유속도 및 착유량에 대한 유전모수 추정

  • Published : 2006.08.31


This study estimated characteristics and genetic parameters for milking traits in Holstein dairy cattle. Daily records (12,561) were available from a hundred fifty four lactating cows with sixty six sires at National Livestock Research Institute from November, 2005 to April, 2006. The cows were fed same rations, and were milked twice daily using milking parlour equipped with Alpro-system?? to collect milking records automatically. The experimental cows have averaged 1.9 parities, 139.7 days in milk, and 13kg milk yield per milking. Average milk flow was 64% of peak milk flow. Milking duration, peak milk flow, average milk flow, and milk yield per milking were 5.57±1.67 minutes, 3.58±0.79kg/minute, 2.28±0.51kg/minute, and 13.02±4.09kg, respectively. All traits in the morning milking were higher than those of in the evening milking, and were also increased with parity. Heritabilities for milking duration, peak and average milk flow, and milk yield per time were 0.49, 0.70 0.58 and 0.36, respectively. The genetic correlations of milking duration with peak milk flow, average milk flow, and milk yield per time were 0.48, 0.54, and 0.41, respectively. The correlations of milk yield per milking with peak milk flow and average milk flow were 0.23 and 0.30, respectively. In conclusion, milk flow was increased with milk yield; however milk flow was opposite relationship with milk duration. Further studies are not only necessary to warranty genetic parameters, but pre-installation of automatic recording system to collect daily milking record is also necessary.


Milking duration;Milk flow;Milk yield per milking;Correlations


  1. Ali. T. E. and Schaeffer. L. R. 1987. Accounting for covariances among test day milk yields in dairy cows. Can. J. Anim. Sci. 67:637-644
  2. Boettcher. P. J.. Dekker. J. C. M. and Kolstad. B. W. 1998. Development of an udder health index for sire selection based on somatic cell scores. udder conformation. and milking speed. J. Dairy Sci. 81:1157-1168
  3. Bruckmaier. R. M. and Blum. J. W. 1998. Oxytocine release and milk removal in ruminants. J. Dairy Sci. 81 :939-949
  4. Holstein Canada. 1996. Who's who
  5. Kovac, M. and Groeneveld, E. 2003. VCE-5 User's Guide and Reference Manual Ver. 5.1
  6. Meyer, K. and Burnside, E. B. 1987. Scope of subjective assessment of milking speed. J. Dairy Sci. 70:1061-1068
  7. SAS User's Guide: Statistics, Version 8.1 Edition. 1999. SAS Inst., Inc., Cary, NC
  8. Schmidt, G. H., Vleck, L. D. Van and Hutjens, M. F. 1988. Principles of dairy science. 2nd ed. p59-65
  9. Stewart. S.. Godden. S.. Rapnicki, P.. Reid. D.. Johnson. A. and Eicker. S. 2002. Effects of Automatic Cluster Remover Settings on Average Milking, Duration. Milk Flow. and Milk Yield. J. Dairy Sci. 85:818-823
  10. Van Reenen. C. G., Van der Werf, J. T. N.. Bruckmaier, R. M.. Hopster, H., Engel, B.. Noordhuizen, J. P. T. M. and Blokhuis, H. J. 2002. Individual Differences in Behavioral and Physiological Responsiveness of Primiparous Dairy Cows to Machine Milking. J. Dairy Sci. 85:2551-2561
  11. Zwald, N. R.. Weigel, K. A., Chang, Y. M.. Welper. R. D. and Clay, J. S. 2005. Genetic evaluation of dairy sires for milking duration using electronically recorded milking times of their daughters. J. Dairy Sci. 88: 1192-1198
  12. 안영석,선영순,백광수,박성재,이현준,이왕식,김상범, 박수봉, 김현섭,주종철, 아즈말 칸 2005. 착유우의 연속유량, 유량변이, 유성분, 체세포수, 비유시간, 비유속도에 대한 산차, 착유시간, 유기 및 착유간격의 효과. 한국동물자원과학회지. 47:919-924
  13. Silvestre. A. M.. Petim-Batista, F. and Colaco. J. 2006. The accuracy of seven mathematical functions in model ing dairy cattle lactation curves based on test-day records from varying sample schemes. J. Dairy Sci. 89: 1813-1821
  14. 안병석, 최유림,고문석, 김준식,김경남,김내수. 1996. 홀스타인 젖소의 관리 형질에 미치는 환경 효과와 모수 추정. 한국축산학회지. 38:337-340
  15. Dodd, F. H. and Griffin, T. K. 1983. Machine milking. Technical bulletin I. The National Institute for Research in dairying reading, England. The Hannah Research Institute, Ayr, Scotland. p194
  16. Lawstuen, D. A., Hansen, L. B., Steuernagel, G. R. and Johnson, L. P. 1988. Management traits scored linearly by dairy producers. J. Dairy Sci. 71:788-799

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