FREQUENCY AND EFFECTS OF FRIZZLE GENES ON BODY WEIGHT OF THE FRIZZLE FEATHERED BIRD ON FREE RANGE IN SELECTED POPULATIONS OF NIGERIAN LOCAL CHICKENS

Authors

  • Gwaza, D. S.
  • Nachi, E. D.

Keywords:

Body weight, feed-intake, frizzle-gene, thermo-regulation

Abstract

The objectives of this study were to provide information on frequency and effect of the frizzle
feather genes on body weight of the frizzle chickens under the free range production system
The study was conducted at Katsina-Ala Local Government Area in four districts, town ship,
Tongov, Ikyura-itiev and Shitile. Data were collected on 1993 birds, comprising of 1673, 188,
48 and 84 normal feathering, naked neck frizzle feathered and the dwarf chickens respectively.
Parameters that were measured were frequency of the frizzle gene and body weight of the
frizzle genotype. Data were subjected to descriptive statistics to estimate the means, variance
and coefficient of variation as well as the frequency of the frizzle gene in the populations. The
frequency of the frizzle gene was least 2.16 percent. This may be due to selection by farmers
based on interest, crossbreeding with normal feathering birds and the inadequacy of the
heterozygous frizzle to breed true inter-se. The frizzle gene had significant effect on body
weight as it enhances feed intake, improved sensible heat loss which create relief of insensible
respiratory pathways under long and short term heat stress. These leads to efficient
thermoregulation and less disturbance in the acid base balance. The frizzle gene appeared to
exert influence on feed intake. Incorporating feed intake as selection criteria may lead to genetic
gain in body weight of the frizzle birds. The frizzle gene has the potential to be used for the
development of either boiler or layer strain for tropical conditions.

Published

2015-12-30