Value of the Dutch Holstein Friesian germplasm collection to increase genetic variability and improve genetic merit

Journal of Dairy Science
H P DoekesJ Windig

Abstract

National gene bank collections for Holstein Friesian (HF) dairy cattle were set up in the 1990s. In this study, we assessed the value of bulls from the Dutch HF germplasm collection, also known as cryobank bulls, to increase genetic variability and improve genetic merit in the current bull population (bulls born in 2010-2015). Genetic variability was defined as 1 minus the mean genomic similarity (SIMSNP) or as 1 minus the mean pedigree-based kinship (fPED). Genetic merit was defined as the mean estimated breeding value for the total merit index or for 1 of 3 subindices (yield, fertility, and udder health). Using optimal contribution selection, we minimized relatedness (maximized variability) or maximized genetic merit at restricted levels of relatedness. We compared breeding schemes with only bulls from 2010 to 2015 with schemes in which cryobank bulls were also included. When we minimized relatedness, inclusion of genotyped cryobank bulls decreased mean SIMSNP by 0.7% and inclusion of both genotyped and nongenotyped cryobank bulls decreased mean fPED by 2.6% (in absolute terms). When we maximized merit at restricted levels of relatedness, inclusion of cryobank bulls provided additional merit at any level of mean SIMSNP or mea...Continue Reading

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Citations

Mar 4, 2020·Biopreservation and Biobanking·Flin ZomerdijkPaul Boettcher
Sep 29, 2019·Genetics, Selection, Evolution : GSE·Harmen P DoekesJack J Windig
Jun 12, 2019·Animal Science Journal = Nihon Chikusan Gakkaihō·Satoshi YamaguchiTakayoshi Kawahara

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