Modelling genetic covariance structure across ages of mean fibre diameter in sheep using multivariate and random regression analysis

Title
Modelling genetic covariance structure across ages of mean fibre diameter in sheep using multivariate and random regression analysis
Publication Date
2012
Author(s)
Asadi Fozi, Masood
Van Der Werf, Julius H
( author )
OrcID: https://orcid.org/0000-0003-2512-1696
Email: jvanderw@une.edu.au
UNE Id une-id:jvanderw
Swan, Andrew
( author )
OrcID: https://orcid.org/0000-0001-8048-3169
Email: aswan@une.edu.au
UNE Id une-id:aswan
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
CSIRO Publishing
Place of publication
Australia
DOI
10.1071/AN12139
UNE publication id
une:12727
Abstract
Mean fibre diameter measurements from yearling to 5-year-old Australian fine- and medium-wool Merino sheep were analysed using several multivariate models that varied in covariance structure. A pre-structured multivariate model was found to be the most parsimonious model in comparison with the other models fitted such as banded, autoregressive and random regression. In the preferred model, the ages of mean fibre diameter for fine-wool data were genetically partitioned into yearling, 2 years, 3 years and later ages and for medium-wool data into hogget, 2 years and later ages. The estimates of genetic correlations between mean fibre diameter measured at different ages for medium-wool sheep were higher (0.89-1.00) than those for fine-wool Merino (0.75-1.00).
Link
Citation
Animal Production Science, 52(11), p. 1019-1026
ISSN
1836-5787
1836-0939
Start page
1019
End page
1026

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