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Genomic selection in French Dairy Goats

Abstract : The main French dairy goats breeds Alpine and Saanen are selected using a total merit that combines milk production traits (protein and fat yields and protein and fat contents), udder morphology and udder health. Genomic selection has been implemented, thanks to the following steps of research: i) the sequencing of goat genome in 2010, ii) the creation of the IGGC to promote and coordinate the development of a high-density SNP ship enabling the design of the Illumina 50K SNP ship in 2011, iii) the implementation of a reference male population. Specificities of French dairy goats - small reference population size and low linkage disequilibrium – required a suitable statistical model. INRA studies showed that with a Single Step GBLUP, expected gains in accuracy would be of 0.06 for milk yield and 0.14 for fat and protein contents. These results encouraged INRA to implement genomic evaluations, and first GEBVs were published in 2018. The breeding scheme has been entirely renewed by the breeding organization Capgenes, particularly for AI bucks. The male selection intensity increased and the generation interval was reduced, thanks to the early choice of bucks among a larger number males born from planned mating and genotyped at one month of age, and thanks to the use of young bucks for AI. ). Genetic evaluation programs have been adapted to produce early GEBVs as soon as genotyping are available. With these improvements, an increase of genetic progress is expected (20 to 30%) in the coming years, resulting in a rise on the net margin of the breeders. Moreover, new traits can be introduced in breeding goals while maintaining the same efficiency on historical traits. GEBVs for female AI fertility and for semen production are expected for 2020 (for internal use in a first time), and studies are ongoing on longevity, milk persistency and feed efficiency
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https://hal.inrae.fr/hal-03155964
Contributor : Isabelle Palhiere <>
Submitted on : Tuesday, March 2, 2021 - 10:41:08 AM
Last modification on : Friday, September 10, 2021 - 3:24:02 PM

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Virginie Clement, Céline Carillier-Jacquin, Marc Tessier, Rachel Rupp, Gwenola Tosser-Klopp, et al.. Genomic selection in French Dairy Goats. 28. Plant and Animal Genome, Jan 2020, San Diego, United States. ⟨hal-03155964⟩

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