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Article

Genetic components of days open under heat stress.

Journal of dairy science - 1 Sept 2004

Oseni S, Misztal I, Tsuruta S, Rekaya R

Abstract excerpt

A reaction norm approach was used to estimate the genetic parameters of days open (DO) with a model that accounted for heat stress. Data included DO records for Georgia, Tennessee, and North Carolina in the Southeastern United States. A fixed effect model included herd-year, month of calving (MOC), age of cow, and a regression on 305-d milk yield. The reaction norm model additionally included the effect of animal...

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PMID: 15375064
DOI: 10.3168/jds.S0022-0302(04)73434-7

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