For the purpose of comparative mapping of quail (Coturnix c. japonica) and human (Homo sapiens) genomes, DNA fragments from human chromosome 3 (HSA3p14-21 and HSA3q13-23) were localized on quail mitotic chromosomes. Using the method of double-color fluorescence DNA-DNA in situ hybridization, these fragments were mapped to two different microchromosomes. Earlier, similar studies were performed using chicken mitotic chromosomes. There it was demonstrated that the clones of interest were distributed among three microchromosomes (GGA12, GGA14, and GGA15). Thus, interspecific difference in the location of human chromosome 3 DNA fragments in the genomes of closely related avian species was discovered. A new confirmation of the hypothesis on the preferable localization of the gene-rich human chromosome regions on avian microchromosomes was obtained. At the same time, a suggestion on the localization of some orthologous genes in the genome of the organism under study was made: ARF4, SCN5A, PHF7, ABHD6, ZDHHC3, MAPKAPK3, ADSYNA (homolog of chicken chromosome 12), DRD2, PP2C-ETA, RAB7, CCKAR, and PKD1 (homolog of chicken chromosome 15). However, localization of the corresponding quail genes needs to be confirmed, as far as the sequences used were only the orthologs of the corresponding chicken genes.
Russian Journal of Genetics – Springer Journals
Published: Jun 28, 2007
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