GENETIC MECHANISMS AFFECTING FERTILITY IN NATURALLY MATED FLOCKS OF NIGERIAN LOCAL CHICKEN POPULATIONS

Authors

  • Gwaza, D. S. Department of Animal Breeding and Physiology, University of Agriculture, Makurdi. Nigeria
  • Dim, N. I. Department of Animal Breeding and Physiology, University of Agriculture, Makurdi. Nigeria
  • Momoh, O. M. Department of Animal Breeding and Physiology, University of Agriculture, Makurdi. Nigeria

Keywords:

Additive, genetic, environment, fertility, non-additive-genetic variance

Abstract

The study was conducted to evaluate the fertility of two local chicken ecotypes at Akpehe
poultry farm, Makurdi. 160 birds of the Tiv and Fulani ecotypes were housed singly in dwarf
wall pens partitioned by wire nettings. A total of 1600 fertile eggs were used to evaluate the
fertility. The eggs were identified using their sire and dam information. Eggs were incubated in
batches. Data was analyzed using SAS. Ecotype, sire, dam and month of hatching significantly
affected fertility. There were also significant effect of dam and sire within and between the
ecotypes. The additive and non-additive genetic superiority or inferiority of the sire, dam and
ecotype accounted for all the variation observed on fertility. The magnitude of these effects may
vary, depending on the inferiority or superiority of the individual, the ecotype or the breed. Thus,
the male and female genetics, permanent environmental effects and co-variances between genetic
effects and non-random, non-genetic effects of mates accounted for all the sources of variation in
fertility. Fertility can be improved through selective breeding from the population.

Published

2016-12-30