GENETIC AND PHENOTYPIC PARAMETERS FOR MILK YIELD, DAYS OPEN AND NUMBER OF SERVICES PER CONCEPTION OF HOLSTEIN COWS OF A COMMERCIAL HERD IN EGYPT

Document Type : Original Article

Authors

• S. Abou-Bakr ¹
• U. . El-Saied ²
• M. A.M. Ibrahim ³

¹ Department of Animal production, Faculty of Agriculture,Cairo University , Giza, Egypt

² Animal Production Research Institute, Ministry of Agriculture, Dokki, Cairo, Egypt

³ Department of Animal production, Faculty of Agriculture, Cairo University, Giza, Egypt