Abstract
ABSTRACT We aimed to evaluate the impact of using embryo transfer (ET) information on weaning weight estimated breeding values (EBV) and its accuracy. Data from Hereford and Braford cattle, raised under extensive conditions in Southern Brazil, were used. A model that included ET information in addition to maternal (genetic and permanent environmental) effects as a function of foster dams was compared to a model without ET information. Accuracy of both bulls and calves increased due to inclusion of ET records [...]
Highlights
The success of a genetic evaluation program is closely related to correct understanding of all management system differences and adoption of suitable statistical methods that deals with such peculiarities
We aimed to evaluate the impact of using embryo transfer (ET) information on weaning weight estimated breeding values (EBV) and its accuracy
The results obtained in this study encourage the use of ET phenotypic records in large-scale genetic evaluation programs, especially for bulls that have most of their progeny coming from ET
Summary
The success of a genetic evaluation program is closely related to correct understanding of all management system differences and adoption of suitable statistical methods that deals with such peculiarities. As embryo transfer (ET), are widely used in beef and dairy cattle because they provide higher reproductive rates in comparison with traditional mating schemes. Higher genetic gain per generation may be achieved due to reduction of generation interval. It results in larger amounts of progeny in a shorter period. Higher breeding value accuracies are achieved and can increase the genetic gain. One way to improve breeding value accuracy may be to increase the amount of data used to estimate breeding values
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