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An Estimation of Genetic Trend for Production Traits and a Determination of the Impact of Some Factors on it in Iranian Holstein Cattle

Mohamad Saheb Honar; Mohamad Moradi Shahr Babak; Seyed Reza Miraei Ashtiani; Mohamad Bagher Sayad Nezhad

Volume 41, Issue 2 , September 2010

Abstract
  Genetic trend for production traits were estimated in Iranian Holstein cattle using the first lactation data recorded by Cattle Breeding and Dairy Product Improvement Center of the State from 1991 to 2006. Effect of some factors on genetic trend was investigated using data from 18 large herds. (Co) variance ...  Read More