Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20476
Title: Using genomic prediction for footrot resistance in sheep based on case-control industry data
Contributor(s): Esquivelzeta-Rabell, Cecilia (author); Bunter, Kim L  (author); Brown, Daniel  (author); Ferguson, Mark (author)
Publication Date: 2016
Handle Link: https://hdl.handle.net/1959.11/20476
Abstract: Footrot is a highly contagious hoof disease of sheep and other ungulates that has substantial welfare and economic impacts. The extent to which animals are affected by footrot is heritable. However, there are some significant operational limitations to applying traditional pedigree-based selection methods for increasing resistance to footrot. The New Zealand Merino sheep industry have investigated genomic tools in order to use unpedigreed industry animals with footrot phenotypes to predict genomic breeding values. It is imperative to evaluate the accuracy of such genomic predictions. Using cross-validation techniques and a range of reference data sets, we demonstrated a wide range in the average accuracy of prediction for genomic breeding values (GBVs). These were highest with large reference data sets (which included contrasts within flock) and were reduced with lower reference data set size and when predictions were made for flocks outside the reference set. Further analyses will be performed when industry genotypic data are finalised, including validation for sires in ram breeding flocks. However, this preliminary study suggests that there will be some merit for genomic selection against footrot based on industry data.
Publication Type: Book Chapter
Source of Publication: Breeding Focus 2016 - Improving Welfare, p. 101-112
Publisher: University of New England
Place of Publication: Armidale, Australia
ISBN: 9781921597695
Field of Research (FOR): 070201 Animal Breeding
Socio-Economic Outcome Codes: 830310 Sheep - Meat
830311 Sheep - Wool
HERDC Category Description: B1 Chapter in a Scholarly Book
Other Links: http://agbu.une.edu.au/breedingfocus.html
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Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
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