Novosibirsk revisited 24 years on: chromosome polymorphism in the Novosibirsk population of the common shrew Sorex araneus L

A Robertsonian fusion polymorphism in the common shrew ( Sorex araneus L.), first described in Academgorodok near Novosibirsk (western Siberia) in 1970–72, was re-examined in 1994–95. The polymorphism in the 1970s involved chromosome arm combinations go, jl, mp and qr, i.e. each of these combination...

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Bibliographic Details
Published in:Heredity 1997-08, Vol.79 (2), p.172-177
Main Authors: Polyakov, Andrei V, Chadova, Nina B, Rodionova, Marina I, Panov, Victor V, Dobrotvorsky, Andrei K, Searle, Jeremy B, Borodin, Pavel M
Format: Article
Language:English
Subjects:
Animals
Biomedical and Life Sciences
Biomedicine
Cytogenetics
Ecology
Evolutionary Biology
Gene Frequency
Human Genetics
original-article
Plant Genetics and Genomics
Polymorphism, Genetic
Population Dynamics
Shrews - genetics
Siberia
Sorex araneus
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Summary:A Robertsonian fusion polymorphism in the common shrew ( Sorex araneus L.), first described in Academgorodok near Novosibirsk (western Siberia) in 1970–72, was re-examined in 1994–95. The polymorphism in the 1970s involved chromosome arm combinations go, jl, mp and qr, i.e. each of these combinations was present in both a metacentric and a twin-acrocentric state in the population at that time. The twin-acrocentric morph for go occurred at low frequency in 1970–72 and was not observed in 1994–95. The polymorphism for arm combinations jl, mp and qr was still observed in 1994–95 and there was no significant difference in metacentric/twin-acrocentric frequencies compared with the previous sample. This is the third well-documented example in which the chromosome polymorphism in the common shrew has been found to be unchanged over a period of 20+ years. Although the polymorphism for qr may be associated with a chromosomal hybrid zone with a cline centre 200 km away, there is no definitive explanation for the other polymorphisms.
ISSN:0018-067X
1365-2540
DOI:10.1038/hdy.1997.140