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December 8, 2025Canadian Journal of Animal Science

Genetic evaluation of profitability measures in Holstein dairy cows

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Authors

DRDavoud RostamiAPAbbas PakdelEGEbrahim Ghasemi

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Overview

Shows strong heritability for profit in holstein dairy cows, indicating that breeding programs may improve profitability and sustainability.

Key Points

  • To estimate genetic parameters for profit indices and identify the most reliable index for selecting holstein dairy cows.
  • Collected 4,637,629 test-day records from 255,804 cows across 124 herds over 15 years.
  • Assessed profitability indices including profit, income over feed cost, and milk-to-feed price ratio.
  • Identified correlations between profit and various indices.
  • Profit showed moderate heritability (0.25), indicating potential for genetic improvement.
  • Income over feed cost per 100 kg of milk had the highest correlation with profit (r = 0.97).
  • Higher milk yield showed a negative genetic trend in profitability, suggesting a focus on production may harm economic efficiency.

Cite This Study

Rostami et al. (2025) studied this question.

synapsesocial.com/papers/69362f4b4fa91c937236d7dahttps://doi.org/10.1139/cjas-2025-0043
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