Abstract

The advantage of using embryo transfer (ET) as a mean of increasing the intensity of selection through the female dairy cow was studied using a simulation model. Several degrees of reproductive success for ET were considered (between 3 and 100 calves per donor per year), which were compared with the results of selecting replacements from breeding without the use of ET. The maximum advantage expected under the present conditions (around 400 kg at lactation after 20 years of carring out selection with 15 offspring per donor cow and h2=0.20) does not offer any advantage that could justify the use of such and expensive technique for the purpose of genetic improvement of a dairy herd.
 

R. Navarro-Fierro, C. Posee, L. Zarco

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XII. Biotechnology, selection experiments, parameter estimation, design of breeding systems, management of genetic resources., , 121–126, 1986
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