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Title: Modelling genetic covariance structure across ages of mean fibre diameter in sheep using multivariate and random regression analysis
Contributor(s): Asadi Fozi, Masood (author); Van Der Werf, Julius H (author)orcid ; Swan, Andrew (author)
Publication Date: 2012
DOI: 10.1071/AN12139
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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).
Publication Type: Journal Article
Source of Publication: Animal Production Science, 52(11), p. 1019-1026
Publisher: CSIRO Publishing
Place of Publication: Collingwood, Australia
ISSN: 1836-5787
Field of Research (FOR): 060412 Quantitative Genetics (incl Disease and Trait Mapping Genetics)
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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