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USE OF TEST-DAY MILK YIELD FOR GENETIC EVALUATION IN DAIRY CATTLE: A REVIEW
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نویسنده
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BILAL G. ,KHAN M. S.
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منبع
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pakistan veterinary journal - 2009 - دوره : 29 - شماره : 1 - صفحه:35 -41
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چکیده
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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.
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کلیدواژه
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Test-day milk yield ,genetic evaluation ,dairy cattle ,test-day model.
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آدرس
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Islamia University of Bahawalpur, University College of Veterinary and Animal Sciences, Pakistan, University of Agriculture, Department of Animal Breeding and Genetics, Pakistan
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Authors
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