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Genetic Selection for Mastitis Resistance.

Kent A Weigel1, George E Shook1

  • 1Department of Dairy Science, University of Wisconsin-Madison, 1675 Observatory Drive, Madison, WI 53706-1205, USA.

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|October 15, 2018
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Summary
This summary is machine-generated.

Genetic selection significantly improves mastitis resistance in dairy cattle. Utilizing national veterinary records and producer data allows for direct selection against clinical mastitis incidence, reducing economic losses on farms.

Keywords:
Dairy cattleGenetic selectionGenomic predictionMastitisSomatic cell countUdder health

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Area of Science:

  • Veterinary Medicine
  • Animal Genetics
  • Dairy Science

Background:

  • Mastitis is a widespread and economically damaging disease affecting dairy farms globally.
  • Effective mastitis control relies on improved farm management, hygiene practices, and genetic selection for disease resistance.
  • Different countries have employed varying strategies for genetic selection, including direct selection for clinical mastitis and indirect selection for somatic cell count.

Purpose of the Study:

  • To review the advancements in genetic selection strategies for improving mastitis resistance in dairy cattle.
  • To highlight the evolution of selection methods, from traditional approaches to modern data-driven techniques.

Main Methods:

  • Analysis of national veterinary recording systems in Nordic countries for direct selection of sire families with low clinical mastitis incidence over 30 years.
  • Review of indirect selection methods based on somatic cell count practiced in other countries.
  • Examination of recent trends utilizing pooled producer-recorded data from on-farm herd management software for clinical mastitis incidence selection.

Main Results:

  • Long-term direct selection in Nordic countries has successfully identified sire families with reduced clinical mastitis.
  • Indirect selection for lower somatic cell count has been a common practice globally.
  • Emerging data pooling strategies are enabling effective selection for reduced clinical mastitis incidence in the US and other major dairy nations.

Conclusions:

  • Genetic selection is a powerful tool for permanent improvement of mastitis resistance in dairy populations.
  • The adoption of advanced data management systems facilitates more precise and effective selection for mastitis resistance.
  • Continued genetic selection efforts are crucial for mitigating the economic impact of mastitis in the dairy industry.