Biometric Variability of Arabia Goat in Laghouat (Algeria) Using the Mean of the Principal Component Analysis

Subject Areas : Camel

M. Laouadi ¹ , S. Tennah ² , N. Azzag ³ , N. Kafidi ⁴ , N. Antoine-Moussiaux ⁵ , N. Moula ⁶

1 - Department of Agronomy, University Amar Telidji, Laghouat, Algeria|Laboratory of Research Management of Local Animal Resources (GRAL), National Veterinary College of Algiers, El Alia, Algiers, Algeria
2 - Laboratory of Research Management of Local Animal Resources (GRAL), National Veterinary College of Algiers, El Alia, Algiers, Algeria
3 - Laboratory of Research Management of Local Animal Resources (GRAL), National Veterinary College of Algiers, El Alia, Algiers, Algeria
4 - Canadian Food Inspection Agency, Ottawa, Ontario K1A 0Y9, Canada
5 - Fundamental and Applied Research for Animals and Health (FARAH), Sustainable Animal Production, Faculty of Veterinary Medicine, University of Liege, Liege, Belgium
6 - Fundamental and Applied Research for Animals and Health (FARAH), Sustainable Animal Production, Faculty of Veterinary Medicine, University of Liege, Liege, Belgium

Received: 2020-07-07 Accepted : 2020-09-15 Published : 2021-06-01

Keywords: Multivariate analysis, Algeria, Arabia, breed homogeneity,

Abstract :

Genetic erosion has a great risk for local goat genetic resources around the world and in Algeria. This study is aimed to verify the homogeneity of Arabia goat through multivariate analysis. A total of 111 females aged three years or more were involved. The Principal Component Analysis (PCA) and Hierarchical Classification Analysis (HCA) were conducted on 14 quantitative variables. Furthermore, 7 body indices were calculated. Through the PCA, the three first factorial components accounted for 60.50% of the total variability (31.02, 20.04 and 9.44%, respectively). HCA allowed classifying the Arabia population into three groups that differ significantly (p˂0.05): the group 1 (n=30, 27.03% of the total) is constituted by the smallest goats, the group 2 (n=56, 50.45% of the total) is characterized by the highest values of body length, height at withers and chest circumference and finally the group 3 (n=25, 22.52% of the total) is characterized by the highest values of width measurements and canon circumference. Morphology indices calculated did not show a significant difference between the three groups for cephalic index, body index, body length index and thoracic development index. About body ratio, chest dactyl index, and canon thickness index, a significant difference was shown especially with group 3. This work highlighted the non-existent of morphometric similarity in Arabia breed of Laghouat region (Algeria).

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