%0 Journal Article %T Effect of Calf Birth Weight on some of the Economically Important Traits in Iran,s Holstein Dairy Cow Population %J Iranian Journal of animal Science %I پردیس کشاورزی و منابع طبیعی دانشگاه تهران %Z 2008-4773 %A GHORAISHY, Seyyed shadi %A ROKOUEI, Mohammad %A SARGOLZAEI, Mehdi %A MOGHIMI ESFANDABADI, Ahmad %D 2013 %\ 05/22/2013 %V 44 %N 1 %P 35-43 %! Effect of Calf Birth Weight on some of the Economically Important Traits in Iran,s Holstein Dairy Cow Population %K Weight groups %K Iranian Holstein dairy cows %K Productive traits %K Reproductive traits %K Dystocia %R 10.22059/ijas.2013.32129 %X Birth Weight (BW) is the first trait recorded fllowing birth. It can influence the performance of thecow and as well impact the performance of the calf it,s duringits maturity. To investigate the effect ofa calf,s BW on the performance of Holstein dairy cattle in Iran, the records gathered between 1967 and2010 were obtained from the Iranian Animal Breeding Center. The data were then used to model theproductive and reproductive traits including Calving to First Insemination (CFI), First Service toConception (FSTC), Calving Interval (CI), and dystocia. BW of calves within each herd were groupedinto five categories based on standard normal distribution (z≤-0.8416, -0.8416