Increase in the number of the B-chromosomes and variants of their system in mouse Apodemus peninsulae in Mountain Altai population over 26 years

Increase in the number of the B-chromosomes and variants of their system in mouse Apodemus... A new evolutionary genetic phenomenon—increase in the number of B-chromosomes (almost threefold) accompanied by change in B chromosome morphotypes—was discovered in the Artybash population of East Asian mouse Apodemus peninsulae (Mountain Altai) over a historically short period (22 years), comparable with a small number of mouse generations (ten generations). The process of increase in the number of A. peninsulae B-chromosomes in Mountain Altai has been monitored over 26 years (1980, 1986, 1988, 1990, 2002, and 2006). A concept of a new type of genomic mutations—mutations in the number of B-chromosomes—has been substantiated. The phenomenon of genomic mutations in pro-B-chromosomes has been discovered only in the Mountain Altai populations. This region differs from the remaining A. peninsulae dwelling localities by pollution with unspent liquid propellant (UDMH, heptyl). It is assumed that the variants of mouse B chromosome system in the studied A. peninsulae populations in the overall habitation area over long-term periods are likely to remain relatively stable and that their variation is controlled by homeostatic processes. Disturbance of these processes, in particular, due to anthropogenic load, can disrupt the cyclic pattern of increase and decrease in the number of A. peninsulae B-chromosomes in individual years. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Increase in the number of the B-chromosomes and variants of their system in mouse Apodemus peninsulae in Mountain Altai population over 26 years

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2008 by MAIK Nauka
Subject
Biomedicine; Microbial Genetics and Genomics; Animal Genetics and Genomics; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1134/S1022795408090093
Publisher site
See Article on Publisher Site

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