DEPARTMENT OF ANIMAL SCIENCE

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Author: search.filters.author.Osaiyuwu, O. H.Subject: search.filters.subject.Haemoglobin

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    Haemoglobin Polymorphism in Red Sokoto Goats of Nigeria
    (2013) Osaiyuwu, O. H.
    This study describes the genetic structure from the Hb locus in goats of the Red Sokoto type. The haemotypification of the individuals at the Hb locus was achieved by Cellulose acetate electrophoresis. The haemoglobin polymorphism in the Red Sokoto goat was identified in the electrophoretic field of three migration zones: the fast haemoglobin named HbA type, the intermediate migration labelled HbAHbB type and the slow haemoglobin designated HbB type. These phenotypes were determined by the two co-dominant alleles, HbA and HbB' The two alleles control three haemoglobin genotypes: two homozygotes, HbAHbA and HbBHbB, and one heterozygote, HbAHbB. The allele HbA had a higher frequency (60.4%) than the allele HbB (39.6%). The HbAHbB heterozygotes had a higher incidence in the population (64.15%) in comparison with the other two homozygous genotypes; the HbAHbA had a middling frequency (28.30%) and HbBHbB had the least occurrence (7.55%). The observed haemoglobin homozygotness (35.8%) was less than the haemoglobin heterozygotness (64.2%) in the current study. This indicates that environmental conditions, selection system or breeding methods has disturbed the Hardy-Weinberg genetic equilibrium at the Hb locus level in the population of Red Sokoto goats
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    Haemoglobin Genetic types of some Major Gene types of Nigerian Indigenous Chicken
    (2012) Akinyemi, M.O.; Osaiyuwu, O. H.; Salako.A.E.; Adegoke, A.N.
    This study describe the genetic structure of the haemoglobin locus in frizzle and naked chickens of Nigerian indigenous chickens. 1 total of fifty-one birds comprising twenty-nine frizz and twenty-two naked neck birds were used for the study. The locus was polymorphic in the populations studied with genetic variants A and B. HbA had a frequency of 0.636 and <).65ifrizzle and naked neck respectively indicating the predominance of A in both populations. The l\codominant alleles control three haemoglobin genotypes AA. AB and BB. Genotype AA occult at the highest frequency in frizzle types while AB was the most frequent in naked neck birds. 7 populations were analyzed for genetic equilibrium based on the differences between II distributions. Both populations were in genetic equilibrium at the haemoglobin locus.