Estimation of Breeding Value for Milk Production Traits in a Holstein Herd with Incomplete Relationships
نویسندگان
چکیده
منابع مشابه
Association between DGAT1 Genotype and Breeding Value of Milk Production Traits in Iranian Holstein Bulls
The aim of this study was to test the genotypes effect of DGAT1 gene on breeding value in Iranian Holstein milk production traits. For this purpose, 103 semen samples of registered bulls were collected and then genotyped for partial region of DGAT1 gene. The studied traits were milk yield (MY), fat yield (FY), protein yield (PY), fat percentage (FP) and protein percentage (PP). First lactation ...
متن کاملEstimation of Economic Values for Fertility, Stillbirth and Milk Production Traits in Iranian Holstein Dairy Cows
The objective of present study was to derive the economic values for number of inseminations to conception, calving interval, milk yield and stillbirth, using economic data of 10 Iranian Holstein herds. The economic values were derived by using the profit function methods and differentiating a profit equation with respect to the traits of interest. The cow fertility costs herd amortization or r...
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1 Department of Genetics and Animal Breeding, West Pomeranian University of Technology in Szczecin, Doktora Judyma 6, 71-466 Szczecin, Poland 2 Department of Animal Genetics and Animal Breeding, National Research Institute of Animal Production, Krakowska 1, 32-083 Balice/Kraków, Poland 3 Department of Genetics, Wrocław University of Environmental and Life Sciences, Kożuchowska 7, 51-631 Wrocław...
متن کاملEstimation of Genetic Parameters for Milk Production Trait in Holstein Cows of the Mazandaran Gavdasht Herd Using Test Day Records
Random regression models (RRM) are used for genetic estimations of milk traits in dairy cows. RRM utilize data on traits that are repeated during the time, such as milk trait, which allows of the evaluation of the test day production information. In this study, to estimate genetic parameters for milk production trait, test day records (TDR) were collected from the first lactation of Holstein co...
متن کاملassociation between dgat1 genotype and breeding value of milk production traits in iranian holstein bulls
the aim of this study was to test the genotypes effect of dgat1 gene on breeding value in iranian holstein milk production traits. for this purpose, 103 semen samples of registered bulls were collected and then genotyped for partial region of dgat1 gene. the studied traits were milk yield (my), fat yield (fy), protein yield (py), fat percentage (fp) and protein percentage (pp). first lactation ...
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ژورنال
عنوان ژورنال: Nihon Chikusan Gakkaiho
سال: 1999
ISSN: 1346-907X,1880-8255
DOI: 10.2508/chikusan.70.8_97