Parameters of Growth of Holstein-Friesian Bulls1
نویسندگان
چکیده
منابع مشابه
Different Models for Estimating Genetic Parameters for Growth Traits of Holstein- Friesian under Semitropical Conditions
Estimates of genetic parameters resulting from three different models for birth weight, weaning weight, yearling weight and total gain were compared. Data consisted of 823 Holstein-Friesian animals progenies of 25 sires and 459 dams in a single herd. The MTDFREML programs were used to estimate heritabilities, predicted transmitting abilities (PTA) and genetic correlations. The three models comp...
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Data from insemination and calving events of Italian Holstein cows and heifers collected from January 1996 until December 2002 were used to estimate phenotypic and genetic parameter for some fertility traits. A validation procedure of the data based on gestation length and information on service sire was used. According to these procedure, in Italy 75.9 % of the calvings are associated to servi...
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The aim of this study was to estimate genetic parameters for slaughter weight, and carcass fleshiness and fatness in Finnish Ayrshire and Holstein-Friesian bulls and heifers. Animal model, sire model and sire maternal grandsire model were tested for their suitability to evaluate young sires in progeny test. There were 38 188 records on animals slaughtered in two slaughter houses during a period...
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ژورنال
عنوان ژورنال: Journal of Animal Science
سال: 1973
ISSN: 0021-8812,1525-3163
DOI: 10.2527/jas1973.372417x