BODY MASS INDEX AND HETEROSIS OF BODY WEIGHT AND MORPHOMETRIC TRAITS OF PURE AND CROSSBRED TURKEY POULTS

Authors

  • Amao, O. J. Department of Animal Production.University of Ilorin, P.M.B. 1515.Ilorin, Kwara State, Nigeria
  • Ayorinde, K. L. Department of Animal Production.University of Ilorin, P.M.B. 1515.Ilorin, Kwara State, Nigeria
  • Fayeye, T. R. Department of Animal Production.University of Ilorin, P.M.B. 1515.Ilorin, Kwara State, Nigeria

Keywords:

Coefficient of variability, Crossbreeding, Nicholas White, Nigerian local, Heterosis

Abstract

Records of 374 turkey poults belonging to four genotypes were used to determine body mass
index (BMI) in pure and crossbred turkeys and F1heterosis for body weight and morphometric
traits in the reciprocal crossbred poults. The body weights of poults were taken weekly, from 0
to 20 weeks. Morphometric traits (Body length, Shank length, Thigh length, Keel length, Breast
Girth and Wing length) were measured at 1, 4, 8, 12, 16 and 20 weeks of age.The results
indicate a general increase in the BMI of poults with age in the four genotypes. The Nicholas
White x Nigerian local (NWxNL) poults had significantly lower (P<0.05) BMI compared with
purebred Nicholas White x Nicholas White (NWxNW). It was also lower in BMI than the
reciprocal crossbred poults at 4, 8, 12, 16 and 20 weeks of age. Negative F1heterosis value of -
1.60 to -32.54 percent and -2.65 to -31.75 percent were obtained for body weight in crossbred
NWxNL and NLxNW, respectively.The values for F1heterosis for morphometric traits were
generally low and negative for the investigated morphometric traits. However, a high coefficient
of variation was obtained for heterosis for body weight of poults at 4-14 weeks old. It is
recommended that crossbreeding programme involving the Nigerian local turkey should be
preceded by an initial selection in the local population. This would help the breeder to take
advantage of the additive genes for body weight and morphometric traits in the Nigerian local
turkey. Direction of cross = (?x ?). Data collected were subjected to the General Linear Model
of SPSS to obtain the mean value used in estimating the body mass index.

Published

2015-12-30