Application of multivariate principal component analysis to morphological characterization of indigenous goats in Southern Nigeria

Authors

  • Moses OKPEKU Niger Delta Univ., Dept. of Livestock Production Wilberforce Island, P.M.B. 071, Amassoma and Univ. of Agriculture, Dept. of Animal Breeding and Genetics, Abeokuta, P.M.B. 2240, Abeokuta, Nigeria
  • Abdulmojeed YAKUBU Nasarawa State Univ., Dept. of Animal Science, Fac. of Agriculture, Lafia Campus, P.M.B. 135, Lafia, Nigeria
  • Sunday Olusola PETERS Univ. of Agriculture, Dept. of Animal Breeding and Genetics, Abeokuta, P.M.B. 2240, Abeokuta and Cornell Univ., Dept. of Animal Science, 267 Morrison Hall, Ithaca, NY 14853, Nigeria
  • Michael Ohiokhuaobo OZOJE Univ. of Agriculture, Dept. of Animal Breeding and Genetics, Abeokuta, P.M.B. 2240, Abeokuta, Nigeria
  • Christian Obiora Ndubuisi IKEOBI Univ. of Agriculture, Dept. of Animal Breeding and Genetics, Abeokuta, P.M.B. 2240, Abeokuta, Nigeria
  • Olufunmilayo Ayoka ADEBAMBO Univ. of Agriculture, Dept. of Animal Breeding and Genetics, Abeokuta, P.M.B. 2240, Abeokuta, Nigeria
  • Ikhide Godwin IMUMORIN Cornell Univ., Dept. of Animal Science, 267 Morrison Hall, Ithaca, NY 14853, USA

DOI:

https://doi.org/10.14720/aas.2011.98.2.14580

Keywords:

goats, autochthonous breeds, body traits, multivariate analysis, Nigeria

Abstract

Phenotypic variation present in a population arises due to genotypic and environmental effects, and the magnitude of phenotypic variability differs under different environmental conditions, therefore, the purpose of this study was to objectively describe the linear type traits of extensively managed mature indigenous goats of Southern Nigeria and to predict body weight from their orthogonal shape characters using principal component analysis. Body weight and four body measurements namely, height at withers, neck length, body length and heart girth were measured in 265 randomly selected West African Dwarf (WAD) and Red Sokoto (RS) goats of both sexes. RS goats had significantly (P < 0.05) higher morphological traits compared to their WAD counterparts. Sexual dimorphism was observed in all the traits with higher values recorded for males. Phenotypic correlations among body weight and biometric traits were positive and highly significant (r = 0.76–0.91 versus 0.82–0.97 and 0.66–0.94 versus 0.83–0.91 for WAD and RS female and male goats, respectively). In the varimax rotated principal component factor analysis, two factors were extracted for each sex of the two breeds, although with varying degrees of factor loadings. The principal component based regression models, which are preferable for selecting animals for optimal balance, accounted for 89.00 and 96.00% as well as 81.00 and 91.00% of the variation in body weight of female and male WAD and RS goats, respectively. The information obtained could be useful in designing appropriate management, selection and breeding programmes for utilization of goat genetic resources.

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Published

14. 12. 2011

Issue

Section

Original Scientific Article

How to Cite

OKPEKU, M., YAKUBU, A., PETERS, S. O., OZOJE, M. O., IKEOBI, C. O. N., ADEBAMBO, O. A., & IMUMORIN, I. G. (2011). Application of multivariate principal component analysis to morphological characterization of indigenous goats in Southern Nigeria. Acta Agriculturae Slovenica, 98(2), 101–109. https://doi.org/10.14720/aas.2011.98.2.14580

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