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Genetic polymorphism of transferrin in Iraqi native and hybrid cows | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 16, Issue 6, 2011, Pages 0-0 | ||
| Authors | ||
| T.A. Jaayid; M.Y. Yousief; F.H. Hamad | ||
| Abstract | ||
| This study was carried out at the Animal Farm, Hartha Research Station, College of Agriculture, Basrah University and several farms in Basrah Province. Fifty blood samples were analyzed. Polymorphism of transferrin biochemical system was examined in the blood of Native cow using vertical polyacrylamide gel electrophoresis (PAGE). The study showed the existence of the genetic polymorphism of transferrin, so that was discovered more than one allele and therefore more of the genotypes (Six genotypes). Three of them were homozygous genotypes (AA, DD and EE) and three heterozygous genotypes (AD, AE and DE ) responsibility of them three alleles (A, D and E) inherited by the laws of Mendel, according to co dominant. D allele was predominant than allele A and E (0.71, 0.17 and 0.12), respectively. These results have affected even the six genotypes. Homozygous genotype DD was predominant (50%), followed by heterozygous genotypes AD (28%) and DE (14%) and thus accounted for compositions containing allele D (92%) and the rest distributed among the genotypes AA, EE and AE (2, 4 and 2)%, respectively. Good agreement between the observed and expected frequencies on the basis of the Hardy-Weinberg laws (2=1.86). Hence, the found out polymorphism on transferrin is genetically caused and the cow populations are in genetic balance on that locus and this is evidence of the absence of any selection programs or genetic improvement programs in Iraq. This is the first study conducted in Iraq was intended to first conduct a survey on the presence or absence of transferrin alleles. The alleles have been discovered and the possible benefit for the genetic improvement programs of domestic animals and the conservation of bio-diversity. Keywords: Polymorphism, Transferrin Gene, Native Cow, Polyacrylamide Gel Electrophoresis. | ||
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