Use of test-day milk yield for genetic evaluation in dairy cattle: a review. | [Pakistan Veterinary Journal • 2009]

Author(s):

1. G. Bilal: University College of Veterinary and Animal Sciences, Islamia University, Bahawalpur, Pakistan

2. M. S. Khan: Department of Animal Breeding and Genetics, University of Agriculture, Faisalabad, Pakistan

Abstract:

The use of appropriate method for genetic evaluation of dairy animals is an important aspect of dairy cattle production. Traditional 305-day lactation model does not account for the changes in environmental factors within 305-day lactation and may involve unjustified projection of incomplete lactations. The use of test-day model in the recent past has made it possible to economize the genetic evaluation with a better accuracy. This paper reviews the recent developments in genetic evaluation of dairy cattle in the developed production set ups and explores the possibility of using test-day model for genetic evaluation of dairy cattle in Pakistan. Different options within test-model approach are also discussed. This is expected to provide food for thought in place in countries like Pakistan where production recording and genetic evaluation systems are getting.

Page(s): 35-41

DOI: DOI not available

Published: Journal: Pakistan Veterinary Journal, Volume: 29, Issue: 1, Year: 2009

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