Abstract:The objective of this study was to evaluate the impact of the reduction in the number of test-day records per lactation on genetic parameters of test-day milk yield (TDMY) and the reliability of estimated breeding values for 305-day milk yield in Holstein cattle. Through the random elimination of milk test-days over the lactation period, seven subpopulations were formed, which differed in number of test-day records/lactation/cow, so that all cows in each subpopulation necessarily contained four to ten records … Show more
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