publication . Article . 2004

Evaluation of body condition score measured throughout lactation as an indicator of fertility in dairy cattle

Banos, G.; Brotherstone, S.; Mike Coffey;
Open Access
  • Published: 01 Aug 2004
  • Country: United Kingdom
Abstract
<p>Body condition score (BCS) records of primiparous Holstein cows were analyzed both as a single measure per animal and as repeated measures per sire of cow. The former resulted in a single, average, genetic evaluation for each sire, and the latter resulted in separate genetic evaluations per day of lactation. Repeated measure analysis yielded genetic correlations of less than unity between days of lactation, suggesting that BCS may not be the same trait across lactation. Differences between daily genetic evaluations on d 10 or 30 and subsequent daily evaluations were used to assess BCS change at different stages of lactation. Genetic evaluations for BCS level ...
Subjects
free text keywords: body condition change, HEALTH, LINEAR TYPE TRAITS, YIELD, RANDOM REGRESSION, MILK-PRODUCTION, ENERGY-BALANCE PROFILES, WEIGHT, REPRODUCTIVE-PERFORMANCE, body condition score, COWS, fertility index, GENETIC-PARAMETERS
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