Please use this identifier to cite or link to this item:
Title: Impact of ewe genotype on sire breeding values in genetic evaluation of Merino body composition and components of reproduction
Contributor(s): Mortimer, S I (author); Egerton-Warburton, K L (author); Swan, A A  (author)orcid 
Publication Date: 2021
Handle Link:
Related DOI: 10.1071/ANv61n3abs
Abstract: There are anecdotal concerns among Merino breeders that Australian Sheep Breeding Values (ASBVs) of sires do not always predict performance when sires are used in a different genetic background, or in other words, when joined to different ewe genotypes (often referred to as 'bloodlines'). Whilst previous analyses (Egerton-Warburton et al. 2019) found significant but small sire x ewe genotype interactions for post-weaning and hogget fleece traits in Merino sheep, it might be expected that heterosis is more likely to affect traits associated with fitness. Mortimer and Atkins (1997) found significant direct and maternal heterosis effects on component reproduction traits using data from a large crossing experiment. The extent to which these effects would be influencing Merino reproduction traits assessed in central test sire evaluation and on-farm progeny testing is, however, unknown.
Publication Type: Conference Publication
Conference Details: AAAS 2021: 33rd Biennial Conference of the Australian Association of Animal Sciences, Fremantle, Australia, 1st - 3rd February, 2021
Source of Publication: Animal Production Science, 61(3), p. lxxix-lxxix
Publisher: CSIRO Publishing
Place of Publication: Australia
ISSN: 1836-5787
Fields of Research (FoR) 2020: 300305 Animal reproduction and breeding
Socio-Economic Objective (SEO) 2020: 100413 Sheep for wool
HERDC Category Description: E3 Extract of Scholarly Conference Publication
Description: Publication also known as Animal Production in Australia, volume 33
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Conference Publication

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

Page view(s)

checked on Nov 12, 2023


checked on Nov 12, 2023
Google Media

Google ScholarTM


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