Twinning Rates for North American Holstein Sires

Calving data of North American Holsteins were analyzed using a linear sire model and a threshold sire model to estimate fixed effects and sire predicted transmitting abilities (PTA) for twinning rate. The data were 1,324,678 births of 37,174 sires of cows from the National Association of Animal Bree...

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Veröffentlicht in:	Journal of dairy science 2001-09, Vol.84 (9), p.2081-2088
Hauptverfasser:	Johanson, J. M, Berger, P. J, Kirkpatrick, B. W, Dentine, M. R
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal productions Animals Biological and medical sciences Breeding - economics Breeding - statistics & numerical data Cattle - genetics Cattle - physiology Female Fundamental and applied biological sciences. Psychology Incidence Male Models, Biological Models, Genetic Parity Pregnancy Seasons Terrestrial animal productions Twins, Dizygotic - genetics Twins, Dizygotic - statistics & numerical data United States Vertebrates
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