'Service sire' diaporamas de présentation

The U.S. genetic evaluation system

The U.S. genetic evaluation system. U.S. dairy population and milk yield. U.S. DHI dairy statistics (2011). 9.1 million U.S. cows ~75% bred AI 47% milk recorded through Dairy Herd Information (DHI) 4.4 million cows 86% Holstein 8% crossbred 5% Jersey

333 views • 33 slides

Abstr. 31

279 views • 15 slides

Abstr. 31

153 views • 15 slides

Reproduction data in USDA database

Reproduction data in USDA database. History. Format 5 reproductive events. Database design. Record key Cow, calving, herd Record fields Status and production data Up to 50 test-day segments Up to 50 reproductive events. Integration of lactation source data.

218 views • 13 slides