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International Journal of Morphology

versão On-line ISSN 0717-9502

Resumo

AKINYEMI, M. O  e  SALAKO, A. E. Hemoglobin Polymorphism and Morphometrical Correlates in the West African Dwarf Sheep of Nigeria. Int. J. Morphol. [online]. 2010, vol.28, n.1, pp.205-208. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022010000100029.

Red cells extracted from blood samples taken by jugular venipuncture from a total of thirty-six traditionally managed adult West African Dwarf rams and ewes were subjected to starch gel electrophoresis, stained to reveal the activities of different allelemorphs at hemoglobin locus and analyzed. The studies was aimed at examining genetic variation as well as pattern of segregation at the locus and unveil possible association that might exist between the phenotypes and selected zoometrical traits. From the three theoretically phenotypes expected to be produced in the population by the two co-dominant alleles identified, only two: HbAA and HbAB were observed. The observed genotype frequencies conformed to Hardy-Weinberg's equilibrium. Proportion of polymorphic loci was 10.10% while heterozygosity (H) was 0.218. Investigation showed that the Mendelian segregation at the loci tested was not congruent with investigated quantitative traits vis-à-vis horn and hair lengths tested. The hemoglobin phenotypes are independent of the traits tested.

Palavras-chave : Hemoglobin alleles; West African Dwarf; Metric traits; Polymorphism.

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