Weaning weight in pigs and its heritability using dam within sire nested / hierarchical method

  • Abanikannda. O.T.F. Department of Animal Science, School of Agriculture, Lagos State University, Epe – Lagos
  • Kareem-Ibrahim, K. O. Department of Animal Science, School of Agriculture, Lagos State University, Epe – Lagos
  • Raji, F. E.
Keywords: Heritability, Weaning weight, Selection, Pigs, Sib analysis

Abstract

This study aimed at investigating some factors affecting weaning weight and estimating its heritability using the nested hierarchical model from variance components obtained in an analysis of variance.  A total of 43 weaners comprising 25 male and 18 female from two sires and seven dams were evaluated for the influence of sex, sire, dam, litter size and parities on their weaning weight.  The Minitab® statistical software was used for exploratory evaluation and analyses of variance of the effect of factors investigated on weaning weight.  With the exception of sex of piglet which was not significant (P>0.05) on weaning weight, other factors exerted varying degrees of influence (P<0.05) on the weight of pigs at weaning.  The largest source of variation was from dam (64.14 %), while other factors studied accounted as follows; litter size (61.10 %), parity (18.79 %) and sire (15.73 %).  Heritability estimates for weaning weight in the study by sire, dam and sire + dam were respectively 0.86, 0.70 and 0.78.  The study revealed that weaning weight was highly heritable in pigs and thus selection can be made for its genetic improvement.

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Published
2024-11-22
How to Cite
Abanikannda. O.T.F., Kareem-Ibrahim, K. O., & Raji, F. E. (2024). Weaning weight in pigs and its heritability using dam within sire nested / hierarchical method. Nigerian Journal of Animal Science and Technology (NJAST), 7(2), 1-9. Retrieved from http://njast.com.ng/index.php/home/article/view/334