Principal component regression of the morphostructural traits of West African dwarf sheep

Authors

  • A. A. Bello-ibiyemi Federal University of Agriculture Abeokuta, P. M.B. 2240, Ogun State, Nigeria
  • A. A., Bello-ibiyemi Federal University of Agriculture Abeokuta, P. M.B. 2240, Ogun State, Nigeria
  • M. Wheto Federal University of Agriculture, Abeokuta, Nigeria
  • A. S. Adenaike Federal University of Agriculture, Abeokuta, Nigeria
  • J. S. Decampos Federal University of Agriculture, Abeokuta, Nigeria
  • D.O. Ogunlakin Federal University of Agriculture, Abeokuta, Nigeria
  • M. Atunnise Federal University of Agriculture, Abeokuta, Nigeria
  • S. Shola Federal University of Agriculture, Abeokuta, Nigeria
  • C.O.N Ikeobi Federal University of Agriculture, Abeokuta, Nigeria

DOI:

https://doi.org/10.51791/njap.v43i2.963

Keywords:

Principal component analysis, Morphostructural traits, West African Dwarf sheep

Abstract

Evaluation of body weight and seven morphostructural traits (body length, wither's height, rump height, fore cannon bone length, chest depth, hip width and hearth girth) of 200 West African dwarf (WAD) sheep of age range 0-1, 1-2, 2-3 and 3-4 was used in determining age and sex effects using General linear model procedure. The sheep were traditionally managed in flocks of southern and north central Nigeria. Interdependence magnitude (redundancy) was estimated to be positive and significant through pearson's correlation estimates between body weight and linear body dimensions (r = 0.04 – 0.81; P < 0.01). Among the linear type traits, highest correlation was observed between body weight and hearth girth in males (r = 0.85) and females (r = 0.81) respectively. Multicollinearity contrast at variance inflation factor (VIF) threshold 3.0 was found to be most associated with rump height, hearth girth and body length; with low tolerance modules. Collinearity effects were further orchestrated with computations of eigen values, condition indexes and variance proportions. The component solution through VARIMAX orthogonal rotation generated one principal component for WAD sheep of age range 0-2 years, and two principal components for age range 2-4 years. The principal component based on regression models revealed, body weight was best predicted from heart girth, and combination of rump height and wither's height measurements.

Author Biographies

A. A. Bello-ibiyemi, Federal University of Agriculture Abeokuta, P. M.B. 2240, Ogun State, Nigeria

College of Animal Science and Livestock Production

A. A., Bello-ibiyemi, Federal University of Agriculture Abeokuta, P. M.B. 2240, Ogun State, Nigeria

Department of Animal Breeding and Genetics

M. Wheto, Federal University of Agriculture, Abeokuta, Nigeria

Department of Animal Breeding and Genetics

A. S. Adenaike, Federal University of Agriculture, Abeokuta, Nigeria

College of Animal Science and Livestock Production

J. S. Decampos, Federal University of Agriculture, Abeokuta, Nigeria

College of Animal Science and Livestock Production

D.O. Ogunlakin, Federal University of Agriculture, Abeokuta, Nigeria

College of Animal Science and Livestock Production

M. Atunnise, Federal University of Agriculture, Abeokuta, Nigeria

College of Animal Science and Livestock Production

S. Shola , Federal University of Agriculture, Abeokuta, Nigeria

College of Animal Science and Livestock Production

C.O.N Ikeobi, Federal University of Agriculture, Abeokuta, Nigeria

Department of Animal Breeding and Genetics

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Published

2021-01-09

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