Genomic selection has increased the range of tools available for bull selection. It has also increased the genetic gap between countries having access or not to genomics. Our study aims at measuring the consequences on genetic progress regarding contrasted levels of information access: only foreign, or domestic but restricted to domestic progeny tested bulls, then extended to foreign ones, and finally to young bulls.  All data available in France were considered and then discarded to mimic the identified scenarios. The average genetic level of the 30 best bulls on the national scale was computed for 3 traits. Genetic progress was favored information on young bullswas available. This is no longer true when  selection was based on foreign information while low genetic correlations between countries. Selection on foreign information can only be considered as a short-term solution while developing domestic genomic evaluations.

Clotilde Patry, Vincent Ducrocq

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Genetic Improvement Programs: Breeding objectives, economics of selection schemes, and advances in selection theory, , 001, 2014
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