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Title: Manipulating response to selection on many traits
Contributor(s): van der Werf, J H J  (author)orcid ; Clark, S A  (author)orcid 
Publication Date: 2023-02-09
Open Access: Yes
DOI: 10.3920/978-90-8686-940-4_475Open Access Link
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Abstract: While selection index theory is a solid framework for a linear optimization of multiple trait selection, it does not always provide desirable selection responses. Responses can be manipulated by varying the economic weights used in a multiple trait index. However, trait responses depend not only on weights, but also on accuracies of the estimated breeding values (EBVs) as well correlations between these EBVs. Predicted selection responses for some traits can be in an undesirable direction if the traits have unfavourable correlations and if there is a large difference in the economic values of the standard deviation of the EBV, as in that case one trait dominates over the other. We extend insight in a two-trait example to a more general case with many traits in the breeding objective. We propose to investigate for each trait its correlation and its dominance relative to the other traits. These parameters can help determine a strategy to avoid undesirable trait responses, whether by changing economic weights or by aiming for more accurate EBVs, or by a combination of these.
Publication Type: Conference Publication
Conference Details: WCGALP 2022: 12th World Congress on Genetics Applied to Livestock Production, Rotterdam, The Netherlands, 3rd - 8th July, 2022
Source of Publication: Proceedings of 12th World Congress on Genetics Applied to Livestock Production (WCGALP), p. 1975-1978
Publisher: Wageningen Academic
Place of Publication: Wageningen, The Netherlands
Fields of Research (FoR) 2020: 300305 Animal reproduction and breeding
300302 Animal management
300399 Animal production not elsewhere classified
Socio-Economic Objective (SEO) 2020: 100499 Livestock raising not elsewhere classified
100699 Primary products from animals not elsewhere classified
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
Appears in Collections:Conference Publication
School of Environmental and Rural Science

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