Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/27299
Title: Cross-validation of single step BLUP applied to terminal sire sheep in Australia
Contributor(s): Gurman, P M  (author); Swan, A A  (author); Boerner, V  (author); Brown, D J  (author)
Publication Date: 2018
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/27299
Open Access Link: http://www.wcgalp.org/proceedings/2018/cross-validation-single-step-blup-applied-terminal-sire-sheep-australiaOpen Access Link
Abstract: To inform decision making regarding the implementation of single step for routine genetic evaluations in sheep in Australia, forward cross-validation and 5-fold cross-validation schemes were used to compare single-step genomic BLUP to pedigree BLUP (hereby referred to as SS-GBLUP and ABLUP, respectively). Accuracies and slopes of EBVs regressed against phenotypes were used to validate the two methods used. Accuracies for genotyped animals from forward cross-validation were, on average across traits, 0.073 higher for SSGBLUP compared to ABLUP and were 0.092 higher calculated using 5-fold. Slopes for genotyped animals from forward validation were, on average across all traits for reference flock animals 0.92 for SS-GBLUP EBVs and 0.80 for ABLUP EBVs, whereas for 5-fold cross-validation the respective slopes where 0.93 and 0.89. Greater increases in accuracies were observed in genotyped sheep with these increases also observed in hard to measure traits, including worm egg counts and carcase traits.
Publication Type: Conference Publication
Conference Name: 11th World Congress on Genetics Applied to Livestock Production
Conference Details: World Congress on Genetics Applied to Livestock Production, Auckland, New Zealand, 10-16 February
Source of Publication: Proceedings of the World Congress on Genetics Applied to Livestock Production, v.11, p. 1-5
Field of Research (FOR): 070201 Animal Breeding
Socio-Economic Outcome Codes: 830310 Sheep - Meat
830311 Sheep - Wool
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
Other Links: http://www.wcgalp.org/proceedings/2018
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Conference Publication

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