Biomaterial Database

[MR-chromosomes in Eurasian populations of Drosophila melanogaster]. 1995

A V Ivannikov, and M D Golubovskiĭ, and Iu A Koromyslov, and I K Zakharov

In natural populations of Drosophila melanogaster, two mutator systems, MR and P-M, are distributed throughout the world. Some evidence shows that these systems can be considered as one. Natural populations of D. melanogaster from Eurasia and North America are fundamentally different with regard to the P-M system. Comparison of Eurasian and North American populations with regard to the MR system was hindered by a lack of data concerning distribution and frequency of MR factors in Eurasia. In this paper, data on the MR-active chromosomes in natural populations of D. melanogaster from Russia and neighboring countries from 1977 to 1992 are presented. The frequencies of MR chromosomes in Eurasian populations were shown to be similar to those in North America. Hence, on a global scale, the MR and P-M mutator systems are expressed independently.

UI	MeSH Term	Description	Entries
D009154	Mutation	Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.	Mutations
D009656	North America	The northern continent of the Western Hemisphere, extending northward from the Colombia-Panama border and including CENTRAL AMERICA, MEXICO, Caribbean area, the UNITED STATES, CANADA and GREENLAND. The term often refers more narrowly to MEXICO, continental UNITED STATES, AND CANADA.	Northern America
D002875	Chromosomes	In a prokaryotic cell or in the nucleus of a eukaryotic cell, a structure consisting of or containing DNA which carries the genetic information essential to the cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)	Chromosome
D004331	Drosophila melanogaster	A species of fruit fly frequently used in genetics because of the large size of its chromosomes.	D. melanogaster,Drosophila melanogasters,melanogaster, Drosophila
D005060	Europe	The continent north of AFRICA, west of ASIA and east of the ATLANTIC OCEAN.	Northern Europe,Southern Europe,Western Europe
D005828	Genetics, Population	The discipline studying genetic composition of populations and effects of factors such as GENETIC SELECTION, population size, MUTATION, migration, and GENETIC DRIFT on the frequencies of various GENOTYPES and PHENOTYPES using a variety of GENETIC TECHNIQUES.	Population Genetics
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001208	Asia	The largest of the continents. It was known to the Romans more specifically as what we know today as Asia Minor. The name comes from at least two possible sources: from the Assyrian asu (to rise) or from the Sanskrit usa (dawn), both with reference to its being the land of the rising sun, i.e., eastern as opposed to Europe, to the west. (From Webster's New Geographical Dictionary, 1988, p82 & Room, Brewer's Dictionary of Names, 1992, p34)