Genetic Aspects of Somatic Cell Count in Holstein Dairy Cows in Iran
نویسندگان
چکیده
منابع مشابه
Genetic Trends for Milk Yield, Persistency of Milk Yield,Somatic Cell Count and Calving Interval in Holstein Dairy Cows of Iran
The objective of the present study was to estimate genetic trends for lactation milk yield, persistency of milk yield, somatic cell count and interval between first and second calving in Holstein dairy cows of Iran. The dataset consisted of 210,625 test day and 25,883 first parity cows with milk yield recorded from July 2002 to September 2007 comprising 97 herds in Iran. Breeding values of anim...
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The objectives were to estimate (co)variance components and genetic parameters for lactation curve traits in Holstein dairy cows in Iran. The used data were records on Holstein cows collected during January 2003 to December 2012 by the Animal Breeding Center of Iran (Karaj, Iran). In order to describe the lactation curve, an incomplete gamma function was fitted to 691200 test-day records on 962...
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The aim of the present study was to estimate the genetic parameters and genetic trends of somatic cell score (SCS) in the first 3 lactations of Iranian Holstein cows by random regression (RR) animal model by using Restricted Maximum Likelihood (REML) method. The data set used in this analysis included observations of 340318 test-day records of 41526 cows in 288 herds; 89969 test-day of 11750 co...
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Akbar Pirestani,*, Mohammad Javad Bagheri, Sayed Mahdi Hashemi, Amir Hossine Asgarishahi Department of Animal Science, Khorasgan (Isfahan) Branch, Islamic Azad University, Isfahan, Iran *Corresponding author: Email: [email protected] Received: 20 July 2013 Accepted: 21 November 2013 ABSTRACT This study was conducted to evaluate the impact of Se+Vit E and Cu inject...
متن کاملgenetic trends for milk yield, persistency of milk yield,somatic cell count and calving interval in holstein dairy cows of iran
the objective of the present study was to estimate genetic trends for lactation milk yield, persistency of milk yield, somatic cell count and interval between first and second calving in holstein dairy cows of iran. the dataset consisted of 210,625 test day and 25,883 first parity cows with milk yield recorded from july 2002 to september 2007 comprising 97 herds in iran. breeding values of anim...
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ژورنال
عنوان ژورنال: Animals
سال: 2021
ISSN: 2076-2615
DOI: 10.3390/ani11061637