Genetic variations in local ecotype Turkeys. 2. effect of genotype, sex and hatch batch on growth-related measurements in live birds

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Genetic variations in local ecotype Turkeys. 2. effect of genotype, sex and hatch batch on growth-related measurements in live birds

V. M. O. Okoro, U. E. Ogundu, C. T. Ezeokeke, G. A. Anyanwu, C. L. Okoro, H. O. Ukwu
Int. J. Biosci.2( 11), 109-116, November 2012.
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Three locally adapted ecotype parental turkey lines comprising of Black (B), Bronze (Br) and White (W) plumage colored genotypes were used as experimental lines with each line comprising of 7 males and 15 females. A total of 228 poults generated from the crossing of the parental genotypic lines were used for this study. The effects of genotype, sex, hatch batch and genotype x sex interaction were tested on bodyweight, breast width, drumstick length, body length, shank length and keel length at 4, 8 and 12 weeks of age. There was no significant (p<0.05) hatch batch effect as well as genotype by sex interaction effect on all traits measured. There was significant genotype effect on bodyweight at 8 and 12 weeks with W lines expressing higher bodyweight followed by Br and B lines respectively. Body length and breast width also had significant genotype effect at 8 and 12 weeks with W and Br lines exhibiting higher body length and breast width than B lines. Keel length was significantly higher in W lines at 8 weeks while there was no significant genotype effect at 4 and 12 weeks. However, drumstick length showed significant genotype effect with Br lines having higher drumstick length than W and B lines at 8 and 12 weeks. In addition, shank length was significantly higher in B and Br lines than in W lines. Moreover, there was no significant genotype effect at 4 weeks across all traits. In addition, there was significant sex effect with the males being significantly higher than females in all the traits measured at 4, 8 and 12 weeks of age.


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