Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/19019
Title: Australian Sheep Breeding Values for Worm Egg Count Retain Predictive Power Across Flocks in the Presence of GxE
Contributor(s): Li, Li  (author); Swan, Andrew  (author); Brown, Daniel  (author); Van Der Werf, Julius H  (author)orcid 
Publication Date: 2015
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/19019
Open Access Link: http://www.aaabg.org/aaabghome/AAABG21papers/Li21386.pdfOpen Access Link
Abstract: Genotype by environment interactions (GxE) for worm egg count (WEC) in Merino sheep were estimated in eight environments across Australia from the Sheep CRC Information Nucleus flock (IN). Genetic correlations between environments were estimated using a factor analytic model, with mean correlations for each environment ranging from 0.27 to 0.57 for an overall mean of 0.40, confirming the presence of large GxE effects for WEC. The industry genetic evaluation model for WEC fits a direct genetic effect averaged across environments, which is reported back to breeders as the Australian Sheep Breeding Value (ASBV), with a sire by environment interaction term to accommodate deviations in performance (not reported to breeders). This model was validated using the IN data, with results demonstrating that the average genetic effect does retain predictive power across environments, albeit with lower accuracy due to a lower heritability observed in the sire interaction model when GxE effects are large.
Publication Type: Conference Publication
Conference Name: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics, Lorne, Australia, 28th - 30th September, 2015
Conference Details: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics, Lorne, Australia, 28th - 30th September, 2015
Source of Publication: Proceedings of the Twenty-first Conference of the Association for the Advancement of Animal Breeding and Genetics, p. 386-389
Publisher: AAABG: Association for the Advancement of Animal Breeding and Genetics
Place of Publication: Bundoora, Australia
Field of Research (FOR): 070201 Animal Breeding
Socio-Economic Outcome Codes: 830311 Sheep - Wool
830310 Sheep - Meat
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
Other Links: http://www.aaabg.org/aaabghome/proceedings21.php
Series Name: Proceedings of the AAABG ... Conference
Series Number : 21
Statistics to Oct 2018: Visitors: 121
Views: 123
Downloads: 0
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Conference Publication
School of Environmental and Rural Science

Files in This Item:
3 files
File Description SizeFormat 
Show full item record

Page view(s)

190
checked on May 2, 2019
Google Media

Google ScholarTM

Check


Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.