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March 19, 2026Journal of Dairy ScienceOpen Access

Genetic parameters for clinical mastitis and somatic cell count for the Nordic dairy cattle populations

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Authors

NJN. Vargas JuradoGAG.P. AamandUNU.S. Nielsen

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Overview

Study estimates genetic parameters for udder health traits in Nordic dairy cattle, suggesting improved evaluations for clinical mastitis.

Key Points

  • The study aims to estimate genetic parameters for clinical mastitis and somatic cell count in Nordic dairy cattle across different lactation stages.
  • Analyzed clinical mastitis and somatic cell count traits in Holstein, Nordic Red, and Jersey breeds.
  • Used random regression modeling for somatic cell count traits.
  • Estimated variance components using Monte Carlo expectation-maximization residual maximum likelihood.
  • Low incidence of clinical mastitis observed across all breeds, particularly in the first lactation.
  • Heritability estimates for clinical mastitis ranged from 0.73% to 3.48%.
  • Moderate to high heritability estimates for somatic cell count ranged from 7% to 14%.

Cite This Study

Jurado et al. (2026) studied this question.

synapsesocial.com/papers/69bb9313496e729e62980e90https://doi.org/10.3168/jds.2025-27952
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