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Multivariate analyses of morphological traits in Algerian goats, Sétif, north-eastern Algeria

Published online by Cambridge University Press:  07 May 2013

M. Dekhili ,
M. Bounechada  and
I. Mannalah
M. Dekhili*
Affiliation:
Département d'Agronomie, Université Ferhat Abbas, Sétif-19000, Algérie
M. Bounechada
Affiliation:
Département de biologie, Université Ferhat Abbas, Sétif-19000, Algérie
I. Mannalah
Affiliation:
Département d'Agronomie, Université Ferhat Abbas, Sétif-19000, Algérie
*
Correspondence to: M. Dekhili, Université Ferhat Abbas, Sétif-19000, Algérie. email: [email protected]
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Summary

A total of 700 adult female goats from Sétif area (Algeria), were investigated for eight qualitative morphological traits and 17 body measurements. Sampling included three environmental areas: Northern, Central and Southern area. Coefficients of variation ranged from 10.9 percent to 34.7 percent, showing high heterogeneity. Canonical analyses showed that differences in body measurements between the three area-populations were large and significant in all traits (P < 0.001). The shortest Mahalanobis distance was found between North-Center populations (2.8), while that between Center (4.0) and (8.6) between North-South populations were the largest. Discriminant analysis showed that most goat-populations were classified into their environmental-area, North (73.0 percent), Center (66.8 percent) and South (79.3 percent) with a few misclassified individuals. Correspondence analysis indicated no large differences between the goat populations; they were more homogeneous for qualitative traits. This information will constitute the basis for further characterization and develop conservation strategies for Algerian goat populations

Résumé

La caractérisation de 700 chèvres adultes a été réalisée dans la région de Sétif (Algérie). L’échantillonnage a concerné trois sites environnementaux: Nord, Centre et Sud. Selon les résultats obtenus, les coefficients de variation ont varié de 10,9% à 34,7%, inférant ainsi une large hétérogénéité. L'analyse canonique a fait ressortir de larges et significatives (P < 0.001) différences pour les mesures corporelles. Les distances de Mahalanobis, ont été aussi significatives entre les trois zones. Pour ce qui est l'analyse discriminante, la plus-part des individus ont été classés dans leur zone d'origine, avec un très faible nombre d'individus mal classé. L'analyse des correspondances, au contraire, a démontré une grande homogénéité intra-zone pour les variables qualitatives.

Resumen

En un total de 700 cabras adultas de la provincia de Sétif (Argelia), se estudiaron ocho caracteres morfológicos cualitativos y diecisiete medidas corporales. El muestreo se realizó en tres ambientes: zonas Norte, Centro y Sur. Los coeficientes de variación oscilaron entre un 10,9% y un 34,7%, mostrando una elevada heterogeneidad. Mediante análisis canónico se observó que existían amplias diferencias significativas (P < 0,001), entre las poblaciones de las tres áreas, para todas las medidas corporales. La menor distancia de Mahalanobis se dio entre las poblaciones Norte y Centro (2,8), mientras que las distancias entre las poblaciones Centro y Sur (4,0) y Norte y Sur (8,6) fueron mayores. El análisis discriminante clasificó a la mayoría de las poblaciones caprinas en sus respectivas áreas ambientales, Norte (73,0%), Centro (66,8%) y Sur (79,3%) con escasos individuos catalogados equivocadamente. El análisis de correspondencias no arrojó grandes diferencias entre las poblaciones de cabras, que fueron más homogéneas para los caracteres cualitativos. Esta información va a servir de base para futuras caracterizaciones y para el desarrollo de estrategias de conservación en las poblaciones caprinas argelinas.

Keywords

Algeriagoatsbody measurementscanonical analysischaracterizationcorrespondence analysisdiscriminationmultivariate analysisqualitative traitsAlgériechèvresmesures corporellesanalyse canoniquecaractérisationanalyse des correspondancesdiscriminationanalyse multivariéevariables qualitativesArgeliacabrasmedidas corporalesanálisis canónicocaracterizaciónanálisis de correspondenciasanálisis discriminanteanálisis multivariantecaracteres cualitativos
Type
Research Article
Information
Animal Genetic Resources/Resources génétiques animales/Recursos genéticos animales , Volume 52 , June 2013 , pp. 51 - 57
Copyright
Copyright © Food and Agriculture Organization of the United Nations 2013 

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