Polymorphism and differentiation of the chromosome banding sequence pools and genomic DNA were studied in three natural populations of Chironomus entis from Europe and North America. These populations showed a moderate level of chromosomal polymorphism and high RAPD polymorphism of genomic DNA. The Palearctic and Nearctic populations of this species did not differ significantly in the levels of chromosome and genomic DNA polymorphism. Estimation of the cytogenetic (GDcg) and genetic (GDDNA) distances between these C. entis populations showed that their chromosome banding sequence pools and cytogenetic structures are differentiated to a greater extent than genomic DNA. The values of cytogenetic and genetic distances between the Palearctic and Nearctic populations of C. entis are higher than the values of the corresponding distances between the Nearctic populations, but they do not reach the level of divergence between species.
Russian Journal of Genetics – Springer Journals
Published: Dec 12, 2009
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