GENETIC AND PHENOTYPIC TREND OF MILK PRODUCTION TRAITS AND AGE AT FIRST CALVING APPLYING RANDOM REGRESSION MODEL IN FRIESIAN CATTLE IN EGYPT

Document Type : Original Article

Authors

• M. H. Mohamed ¹
• M. H. Khalil ²
• M. M. Iraqi ³
• S. M. Zahed ⁴

¹ Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture and Land Reclamation, Dokki, Giza

² Department of Animal Production, Faculty of Agriculture at Moshtohor, Benha University, Egypt

³ Department of Animal Production, Faculty of Agriculture at Moshtohor, Benha University

⁴ Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture and Land Reclamation, Dokki, Giza, Egypt

Keywords

• day milk yield
• random regression model
• genetic and phenotypic trends