Multiparity Evaluation of Calving Ease and Stillbirth with Separate Genetic Effects by Parity
نویسندگان
چکیده
منابع مشابه
Multiparity evaluation of calving ease and stillbirth with separate genetic effects by parity.
Evaluations that analyze first and later parities as correlated traits were developed separately for calving ease (CE) from over 15 million calving records of Holsteins, Brown Swiss, and Holstein-Brown Swiss crossbreds and for stillbirth (SB) from 7.4 million of the Holstein CE records. Calving ease was measured on a scale of 1 (no difficulty) to 5 (difficult birth); SB status was designated as...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2008
ISSN: 0022-0302
DOI: 10.3168/jds.2007-0981