Biometric Variability of Arabia Goat in Laghouat (Algeria) Using the Mean of the Principal Component Analysis
الموضوعات :
M. Laouadi
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)
S. Tennah
2
(Laboratory of Research Management of Local Animal Resources (GRAL), National Veterinary College of Algiers, El Alia, Algiers, Algeria)
N. Azzag
3
(Laboratory of Research Management of Local Animal Resources (GRAL), National Veterinary College of Algiers, El Alia, Algiers, Algeria)
N. Kafidi
4
(Canadian Food Inspection Agency, Ottawa, Ontario K1A 0Y9, Canada)
N. Antoine-Moussiaux
5
(Fundamental and Applied Research for Animals and Health (FARAH), Sustainable Animal Production, Faculty of Veterinary Medicine, University of Liege, Liege, Belgium)
N. Moula
6
(Fundamental and Applied Research for Animals and Health (FARAH), Sustainable Animal Production, Faculty of Veterinary Medicine, University of Liege, Liege, Belgium)
الکلمات المفتاحية: Multivariate analysis, Algeria, Arabia, breed homogeneity,
ملخص المقالة :
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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