I.A. Yousif; K.M. Elamin, Husina, A.M. Waggee/Alla,* and A.A. Rahman.

Department ofAnimal Breeding and Genetics, Faculty ofAnimal Production,
University of Khartoum, Shambat, P. 0. Box 32, Sudan.

SUMMARY

243 pullets the progeny of 40 sires and 120 dams were used in this experiment. Data were analysed using Harvey Program (1990) to estimate the genetic and phenotypic parameters for production traits which included age at sexual maturity (AS), body weight at sexual maturity (BW), egg production (EPT) and egg weight (EWT) for the whole period (180 days). The average AS, BW, EPT and EWT were 180.5 days, 998.8g., 3.00 egg/hen housed/week and 34.0g. respectively. Heritability estimates from sire component of variance were 0.081 for AS, 0.443 for BW and 0.397 for EPT. Heritability estimate from sire plus dam component of variance for EWT was 0.601. The genetic and phenotypic correlations among the traits studied were variable. The genetic correlation of BW with EPT from sire component of variance was high and positive (0.53). The genetic correlation of BW with EPT from dam component of variance was low and negative (- 0.167), whereas the genetic correlation of BW with EWT was high and positive (0.348). The phenotypic correlations seem to follow similar trend as genetic correlations.

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