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Genetic evaluation of Alpine goats using different milk control intervals.

F G Silva1, R A Torres, L F Brito

  • 1Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa, MG, Brasil. felipepheu@yahoo.com.br

Genetics and Molecular Research : GMR
|August 28, 2013
PubMed
Summary

Shorter milk recording intervals (7 days) are best for high-tech goat breeding programs. For farms with fewer resources, 14- or 21-day intervals offer cost savings without significantly impacting genetic evaluation quality.

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Area of Science:

  • Animal Science
  • Genetics
  • Dairy Production

Background:

  • Genetic evaluation relies on accurate milk yield data.
  • Optimizing milk recording intervals balances cost and data quality.

Purpose of the Study:

  • To compare genetic evaluation outcomes using varying milk control intervals.
  • To determine cost-effective milk yield control strategies for goat breeding.

Main Methods:

  • Analyzed 20,710 test day milk yield records from Alpine goats.
  • Created datasets with 7, 14, 21, and 28-day control intervals.
  • Utilized RENPED and WOMBAT programs for data processing and genetic evaluations.

Main Results:

  • 7-day intervals are recommended for high-technical level breeding programs.
  • 14- and 21-day intervals provide satisfactory results with reduced costs for average-to-low technical level farms.
  • Analysis considered restricted maximum likelihood, computation time, correlations, and genetic value comparisons.

Conclusions:

  • The optimal milk control interval depends on farm technical level and genetic improvement goals.
  • Shorter intervals (7 days) ensure higher quality genetic evaluations.
  • Longer intervals (14-21 days) offer a viable, cost-effective alternative for specific farm types.