Reference : Estimation of genetic and crossbreeding parameters for daily milk yield of Ayrshire ×...
Scientific journals : Article
Life sciences : Veterinary medicine & animal health
http://hdl.handle.net/2268/8681
Estimation of genetic and crossbreeding parameters for daily milk yield of Ayrshire × Sahiwal × Ankole crossbred cows in Burundi
English
Hatungumukama, G. [ > > ]
Detilleux, Johann mailto [Université de Liège - ULg > Département de productions animales > Génétique quantitative - Epidémiologie et santé publique >]
2008
Livestock Science
Elsevier Science
Yes (verified by ORBi)
International
1871-1413
Amsterdam
The Netherlands
[en] Crossbreeding parameters ; Ayrshire ; Ankole ; Burundi
[en] The pedigree of 317 cows of which 184 were controlled for milk production has been used to estimate crossbreeding parameters for daily milk yield of Ayrshire, Sahiwal and Ankole crosses in the Mahwa station. Lactating cows belonged to one of 6 different genetic groups defined on the basis of the mating system used to produce them. REML estimates of the genetic parameters were obtained with a repeated animal model using daily milk records. Estimated heritability (h2) and repeatability (r2) were 0.27 and 0.36, respectively. The genetic group effects were used to estimate crossbreeding parameters following Dickerson's genetic model. Estimates for the additive effects for daily milk yield of Ankole, Sahiwal and Ayrshire breeds were − 1.66l, − 0.48l and 5.22l, respectively. Estimates of direct heterosis for daily milk yield for Sahiwal × Ankole, Ayrshire × Ankole, and Ayrshire × Sahiwal crosses were 1.97l, 2.30l and − 2.33l, respectively.
Researchers ; Professionals
http://hdl.handle.net/2268/8681
10.1016/j.livsci.2008.09.015

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