TY  - JOUR
T1  - Estimates of Genetic and Phenotype Parameters for Milk Production in Iran Holstein-Friesian Cows
AU - , Ali Hashemi AU - , Mehdi Nayebpoor 
JO  - Research Journal of Biological Sciences
VL  - 3
IS  - 6
SP  - 678
EP  - 682
PY  - 2008
DA  - 2001/08/19
SN  - 1815-8846
DO  - rjbsci.2008.678.682
UR  - https://makhillpublications.co/view-article.php?doi=rjbsci.2008.678.682
KW  - Genetic
KW  -phenotype
KW  -milk production
KW  -parameters
KW  -heritability
KW  -repeatability
AB  - Heritability, repeatability and genetic phenotypic correlations among milk yield, fat yield and fat percentage were estimated using an animal model and 19855 records of 10225 Holstein-Friesian cows enrolled in the Iran, Natural Resources Research center of W. Azarbaijan, Urmia, between 1995 and 2005. Heritabilities for milk yield, fat yield and fat percentage were 0.26, 0.24 and 0.36, respectively and their repeatabilities were 0.31, 0.29 and 0.37, respetively. Genetic correlations of milk yield with fat yield and  with  fat  percentage were 0.96 and -0.29, respectively and correlation of fat yield with fat percentage was -0.06. Phenotypic correlations were 0.96 between milk and fat yields, -0.27 between milk yield and fat percentage and -0.03between fat yield and percentage. It was concluded that these genetic and phenotypic parameter could be used for the genetic evaluation of dairy cattle in Iran.
ER  -