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Across-country genomic predictions in Norwegian and New Zealand Composite sheep populations with similar development history

journal contribution
posted on 2023-05-03, 18:54 authored by Hinayah Rojas Oliveira, John McEwanJohn McEwan, Jette Jakobsen, Thor Blichfeldt, Theo Meuwissen, Natalie Pickering, Shannon ClarkeShannon Clarke, Luiz Brito
The goal of this study was to assess the feasibility of across-country genomic predictions in Norwegian White Sheep (NWS) and New Zealand Composite (NZC) sheep populations with similar development history. Different training populations were evaluated (i.e., including only NWS or NZC, or combining both populations). Predictions were performed using the actual phenotypes (normalized) and the single-step GBLUP via Bayesian inference. Genotyped NWS animals born in 2016 (N = 267) were used to assess the accuracy and bias of genomic estimated breeding values (GEBVs) predicted for birth weight (BW), weaning weight (WW), carcass weight (CW), EUROP carcass classification (EUC), and EUROP fat grading (EUF). The accuracy and bias of GEBVs differed across traits and training population used. For instance, the GEBV accuracies ranged from 0.13 (BW) to 0.44 (EUC) for GEBVs predicted including only NWS, from 0.06 (BW) to 0.15 (CW) when including only NZC, and from 0.10 (BW) to 0.41 (EUC) when including both NWS and NZC animals in the training population. The regression coefficients used to assess the spread of GEBVs (bias) ranged from 0.26 (BW) to 0.64 (EUF) for only NWS, 0.10 (EUC) to 0.52 (CW) for only NZC, and from 0.42 (WW) to 2.23 (EUC) for both NWS and NZC in the training population. Our findings suggest that across-country genomic predictions based on ssGBLUP might be possible for NWS and NZC, especially for novel traits.

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Rights statement

© 2021 John Wiley & Sons Ltd.

Language

  • English

Does this contain Māori information or data?

  • No

Publisher

Wiley

Journal title

Journal of Animal Breeding and Genetics

ISSN

0931-2668

Citation

Oliveira, H. R., McEwan, J. C., Jakobsen, J. H., Blichfeldt, T., Meuwissen, T. H. E., Pickering, N. K., … Brito, L. F. (2022). Across-country genomic predictions in Norwegian and New Zealand Composite sheep populations with similar development history. Journal of Animal Breeding and Genetics, 139(1), 1-12. doi:10.1111/jbg.12642

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