HERITABILITY ESTIMATES FOR BODY WEIGHT IN PUREAND CROSSBRED NIGERIAN GOATS

Authors

  • Yusuff, A. T. College of Agriculture, Zuru, P.M. B. 1018, Zuru, Kebbi State – Nigeria.
  • Sola-Ojo, F. E. Department of Animal Production, Faculty of Agriculture, University of Ilorin, P.M.B. 1515, Ilorin, Nigeria.
  • Ojo, V. Department of Animal Production, Faculty of Agriculture, University of Ilorin, P.M.B. 1515, Ilorin, Nigeria.
  • Alli, O. I. a Department of Animal Production, Faculty of Agriculture, University of Ilorin, P.M.B. 1515, Ilorin, Nigeria.
  • Fayeye T. R. Department of Animal Production, Faculty of Agriculture, University of Ilorin, P.M.B. 1515, Ilorin, Nigeria.

Keywords:

Heritability, West African Dwarf Goat, Red Sokoto Goat, crossbreeding.

Abstract

Forty does and eight bucks of West African Dwarf (WAD) and Red Sokoto goats were mated to
produce pure and reciprocal crossbreds (WADxRSG, RSGxWAD) kids whose records were
used to estimate heritability of body weight at birth, weaning and yearling stages. Heritability
was estimated using variance components due to sire, dam and combine sire-dam effect.
Crossbred WADxRSG was not significantly different (p>0.05) in birth weight from the
purebred WAD (1.81 vs. 1.75 kg). Significantly (p<0.05) positive effect of crossbreeding was
observed in the yearling weights of crossbreds. Estimates of heritability for weaning weight
obtained for the purebreds (WAD and RSG) and WADxSRG cross were generally high (over
60%). Dams’ component heritability estimates were generally low (0.02 – 0.27) in RSGxWAD
cross. Birth weight heritability estimates were low in pure WAD. Heritability estimates of
yearling weight ranged from medium to high levels for all the methods of estimation except the
dams’ components of the crossbreds. The results obtained in this study suggests that heritability
estimates of body at different stages of growth is largely influenced by breeding group but sire
components heritability should be given higher preference for genetic improvement of yearling
weight of WAD and SRG.

Published

2015-12-30