Diversity and comparison of wool parameters in 31 different American and European ovine breeds

Parés P.M. Casanova; R. Perezgrovas Garza; J. Jordana Vidal

doi:10.3920/978-90-8686-727-1-8

Diversity and comparison of wool parameters in 31 different American and European ovine breeds

Parés P.M. Casanova, R. Perezgrovas Garza, J. Jordana Vidal

Department of Animal and Food Science

Research output: Chapter in Book › Chapter › Research › peer-review

Abstract

© Wageningen Academic Publishers 2011. All rights reserved. A study was designed with the aim of establishing phenotypic relationships between certain American and European autochthonous sheep breeds based on wool parameters. Data were collected from 1,143 animals from 31 sheep breeds or varieties. Nine quantitative wool characteristics - length and amount of long, short and kemp fibres, mean fibre diameter and fibres with dameter > 30 p, and percentage after degreasing with alcohol - were investigated. A principal component analysis (PCA) was carried out with the aim of obtaining the variables exhibiting a pattern of jointly contributing to the total variation. To present data structure and relationship among population accessions, a cluster analysis and a principal coordinates analysis of all the data were conducted. For all analyses, the correlation matrix was utilised. Percentage of fibres and fineness appear as the most useful grouping criteria. The resulting dendrogram showed a 'short coarse wool sheep', a 'medium fine wool sheep' (with different percentages of short fibres that allow them to be divided into three subgroups) and a 'long medium wool sheep'. No 'short fine wool sheep' appeared. Although no phylogenetic information is generated, the results seem to establish dfferent, but more concise groups than those traditionally considered: Merino, Entrefino, Churro and Iberian stock.

Original language	English
Title of host publication	Fibre Production in South American Camelids and Other Fibre Animals
Pages	73-78
Number of pages	5
DOIs	https://doi.org/10.3920/978-90-8686-727-1-8
Publication status	Published - 1 Jan 2012

Keywords

Clustering analysis
Fibre diameter
Phylogeny
Population assignment
Sheep breeds

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title = "Diversity and comparison of wool parameters in 31 different American and European ovine breeds",

abstract = "{\textcopyright} Wageningen Academic Publishers 2011. All rights reserved. A study was designed with the aim of establishing phenotypic relationships between certain American and European autochthonous sheep breeds based on wool parameters. Data were collected from 1,143 animals from 31 sheep breeds or varieties. Nine quantitative wool characteristics - length and amount of long, short and kemp fibres, mean fibre diameter and fibres with dameter > 30 p, and percentage after degreasing with alcohol - were investigated. A principal component analysis (PCA) was carried out with the aim of obtaining the variables exhibiting a pattern of jointly contributing to the total variation. To present data structure and relationship among population accessions, a cluster analysis and a principal coordinates analysis of all the data were conducted. For all analyses, the correlation matrix was utilised. Percentage of fibres and fineness appear as the most useful grouping criteria. The resulting dendrogram showed a 'short coarse wool sheep', a 'medium fine wool sheep' (with different percentages of short fibres that allow them to be divided into three subgroups) and a 'long medium wool sheep'. No 'short fine wool sheep' appeared. Although no phylogenetic information is generated, the results seem to establish dfferent, but more concise groups than those traditionally considered: Merino, Entrefino, Churro and Iberian stock.",

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N2 - © Wageningen Academic Publishers 2011. All rights reserved. A study was designed with the aim of establishing phenotypic relationships between certain American and European autochthonous sheep breeds based on wool parameters. Data were collected from 1,143 animals from 31 sheep breeds or varieties. Nine quantitative wool characteristics - length and amount of long, short and kemp fibres, mean fibre diameter and fibres with dameter > 30 p, and percentage after degreasing with alcohol - were investigated. A principal component analysis (PCA) was carried out with the aim of obtaining the variables exhibiting a pattern of jointly contributing to the total variation. To present data structure and relationship among population accessions, a cluster analysis and a principal coordinates analysis of all the data were conducted. For all analyses, the correlation matrix was utilised. Percentage of fibres and fineness appear as the most useful grouping criteria. The resulting dendrogram showed a 'short coarse wool sheep', a 'medium fine wool sheep' (with different percentages of short fibres that allow them to be divided into three subgroups) and a 'long medium wool sheep'. No 'short fine wool sheep' appeared. Although no phylogenetic information is generated, the results seem to establish dfferent, but more concise groups than those traditionally considered: Merino, Entrefino, Churro and Iberian stock.

AB - © Wageningen Academic Publishers 2011. All rights reserved. A study was designed with the aim of establishing phenotypic relationships between certain American and European autochthonous sheep breeds based on wool parameters. Data were collected from 1,143 animals from 31 sheep breeds or varieties. Nine quantitative wool characteristics - length and amount of long, short and kemp fibres, mean fibre diameter and fibres with dameter > 30 p, and percentage after degreasing with alcohol - were investigated. A principal component analysis (PCA) was carried out with the aim of obtaining the variables exhibiting a pattern of jointly contributing to the total variation. To present data structure and relationship among population accessions, a cluster analysis and a principal coordinates analysis of all the data were conducted. For all analyses, the correlation matrix was utilised. Percentage of fibres and fineness appear as the most useful grouping criteria. The resulting dendrogram showed a 'short coarse wool sheep', a 'medium fine wool sheep' (with different percentages of short fibres that allow them to be divided into three subgroups) and a 'long medium wool sheep'. No 'short fine wool sheep' appeared. Although no phylogenetic information is generated, the results seem to establish dfferent, but more concise groups than those traditionally considered: Merino, Entrefino, Churro and Iberian stock.

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