Biometric variability of goat populations revealed by means of principal component analysis

The aim was to analyze variation in 12 Brazilian and Moroccan goat populations, and, through principal component analysis (PCA), check the importance of body measures and their indices as a means of distinguishing among individuals and populations. The biometric measurements were wither height (WH),...

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Published in:Genetics and molecular biology Vol. 35; no. 4; pp. 777 - 782
Main Authors: Pires, Luanna Chácara, Machado, Théa M Medeiros, Araújo, Adriana Mello, Olson, Timothy A, da Silva, João Batista Lopes, Torres, Robledo Almeida, Costa, Márcio da Silva
Format: Journal Article
Language:English
Published: Brazil Sociedade Brasileira de Genética 2012
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Abstract The aim was to analyze variation in 12 Brazilian and Moroccan goat populations, and, through principal component analysis (PCA), check the importance of body measures and their indices as a means of distinguishing among individuals and populations. The biometric measurements were wither height (WH), brisket height (BH) and ear length (EL). Thorax depth (WH-BH) and the three indices, TD/WH, EL/TD and EL/WH, were also calculated. Of the seven components extracted, the first three principal components were sufficient to explain 99.5% of the total variance of the data. Graphical dispersion by genetic groups revealed that European dairy breeds clustered together. The Moroccan breeds were separated into two groups, one comprising the Drâa and the other the Zagora and Rhâali breeds. Whereas, on the one side, the Anglo-Nubian and undefined breeds were the closest to one another the goats of the Azul were observed to have the highest variation of all the breeds. The Anglo-Nubian and Boer breeds were similar to each other. The Nambi-type goats remained distinct from all the other populations. In general, the use of graphical representation of PCA values allowed to distinguish genetic groups.
AbstractList The aim was to analyze variation in 12 Brazilian and Moroccan goat populations, and, through principal component analysis (PCA), check the importance of body measures and their indices as a means of distinguishing among individuals and populations. The biometric measurements were wither height (WH), brisket height (BH) and ear length (EL). Thorax depth (WH-BH) and the three indices, TD/WH, EL/TD and EL/WH, were also calculated. Of the seven components extracted, the first three principal components were sufficient to explain 99.5% of the total variance of the data. Graphical dispersion by genetic groups revealed that European dairy breeds clustered together. The Moroccan breeds were separated into two groups, one comprising the Drâa and the other the Zagora and Rhâali breeds. Whereas, on the one side, the Anglo-Nubian and undefined breeds were the closest to one another the goats of the Azul were observed to have the highest variation of all the breeds. The Anglo-Nubian and Boer breeds were similar to each other. The Nambi-type goats remained distinct from all the other populations. In general, the use of graphical representation of PCA values allowed to distinguish genetic groups.
The aim was to analyze variation in 12 Brazilian and Moroccan goat populations, and, through principal component analysis (PCA), check the importance of body measures and their indices as a means of distinguishing among individuals and populations. The biometric measurements were wither height (WH), brisket height (BH) and ear length (EL). Thorax depth (WH-BH) and the three indices, TD/WH, EL/TD and EL/WH, were also calculated. Of the seven components extracted, the first three principal components were sufficient to explain 99.5% of the total variance of the data. Graphical dispersion by genetic groups revealed that European dairy breeds clustered together. The Moroccan breeds were separated into two groups, one comprising the Draa and the other the Zagora and Rhaali breeds. Whereas, on the one side, the Anglo-Nubian and undefined breeds were the closest to one another the goats of the Azul were observed to have the highest variation of all the breeds. The Anglo-Nubian and Boer breeds were similar to each other. The Nambi-type goats remained distinct from all the other populations. In general, the use of graphical representation of PCA values allowed to distinguish genetic groups.
Author Machado, Théa M Medeiros
Costa, Márcio da Silva
Torres, Robledo Almeida
Pires, Luanna Chácara
Olson, Timothy A
Araújo, Adriana Mello
da Silva, João Batista Lopes
AuthorAffiliation 4 Department of Animal Science, University of Florida, Gainesville, FL, USA
5 Departamento de Engenharia de Agricultura, Universidade Federal de Viçosa, Viçosa, MG, Brazil
1 Departamento de Agronomia, Universidade Federal de Piauí, Bom Jesus, PI, Brazil
3 Empresa Brasileira de Pesquisa Agropecuária, Embrapa Meio Norte, Teresina, PI, Brazil
6 Departamento de Ciência Animal, Universidade Federal de Piauí, Teresina, PI, Brazil
2 Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
AuthorAffiliation_xml – name: 1 Departamento de Agronomia, Universidade Federal de Piauí, Bom Jesus, PI, Brazil
– name: 2 Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
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– name: 4 Department of Animal Science, University of Florida, Gainesville, FL, USA
– name: 6 Departamento de Ciência Animal, Universidade Federal de Piauí, Teresina, PI, Brazil
– name: 5 Departamento de Engenharia de Agricultura, Universidade Federal de Viçosa, Viçosa, MG, Brazil
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– name: Universidade Federal de Viçosa
– name: Universidade Federal do Piauí
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Author_xml – sequence: 1
  givenname: Luanna Chácara
  surname: Pires
  fullname: Pires, Luanna Chácara
  organization: Departamento de Agronomia, Universidade Federal de Piauí, Bom Jesus, PI, Brazil
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  givenname: Théa M Medeiros
  surname: Machado
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  givenname: Adriana Mello
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  fullname: Araújo, Adriana Mello
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  givenname: Timothy A
  surname: Olson
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  givenname: João Batista Lopes
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/23271938$$D View this record in MEDLINE/PubMed
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Issue 4
Keywords biometrics
genetic resources
population characterization
morphometrics
goat breeds
Language English
License License information: This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Snippet The aim was to analyze variation in 12 Brazilian and Moroccan goat populations, and, through principal component analysis (PCA), check the importance of body...
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SubjectTerms Animal Genetics
BIOCHEMISTRY & MOLECULAR BIOLOGY
biometrics
genetic resources
GENETICS & HEREDITY
goat breeds
morphometrics
population characterization
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Title Biometric variability of goat populations revealed by means of principal component analysis
URI https://www.ncbi.nlm.nih.gov/pubmed/23271938
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