SELECTION INDEXES FOR IMPROVING GROWTH RATE IN HOLESTEIN HEIFERS WITH MINIMUM CONCOMITANT INCREASE IN BIRTH WEIGHT

Document Type : Original Article

Authors

• A. R. Shemeis ¹
• M. H. Sadek ¹
• N. A. Shalaby ²

¹ Department of Animal Production, Faculty of Agriculture, Ain Shams University, P. O. Box 68 Hadayek Shoubra, 11241, Cairo, Egypt

² - Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura, Egypt

Keywords

• Body weights
• daily gains
• genetic parameters
• selection indexes
• Holstein heifers