Spatial and temporal analysis of frequency distribution patterns of the Rana esculenta (= lessonae )- specific allele, Ldh-B 71 , in the populations and individuals of R. ridibunda from the Middle Dnieper region was performed. It was established that the allele was accumulated in the populations of Kiev, where on average 15 to 25% of individuals steadily preserved this allele through at least three to four generations. Furthermore, the allele frequency in juveniles and adults was similar. These findings suggest that the frogs carrying foreign genetic material were not eliminated from the populations, and hence, the observed introduction of foreign genes was adaptively neutral. The transfer of the genetic material from one species to another may be considered as a possible mechanism of the formation of an additional source for population genetic variation, which, however, do not seems to be evolutionary progressive.
Russian Journal of Genetics – Springer Journals
Published: Feb 16, 2005
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