Fixation of metacentric chromosomes in eastern Europe populations of the common shrew Sorex araneus L.

Орлов, В. Н.; Kozlovskii, A. I.; Балакирев, А. Е.; Borisov, Yu. M.

doi:10.1134/s1022795408050013

Cited by 7 publications

(1 citation statement)

References 27 publications

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“…In the hybrid zone of the Moscow and the Seliger chro mosomal races the frequency of this rearrangement is about 1 : 600 [15], i.e., it is close to the frequency of spontaneous chromosomal mutations. Since in well studied populations of common shrew chromosomal polymorphism of the whole arm translocation of a metacentric chromosome was not described so far, it seems likely that this mutation was not involved into the evolutionary karyotype changes [17].…”

Section: Hybrid Adaptationmentioning

confidence: 99%

Narrow hybrid zone between Moscow and Western Dvina chromosomal races and specific features of population isolation in common shrew Sorex araneus (Mammalia)

et al. 2012

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The contact zone between Moscow and Western Dvina chromosomal races of common shrew Sorex araneus L. at the south of the Valdai Hights was traced over a distance of 20 km. Within this, close to parapatric, contact zone of chromosomal races the width of sympatry zone was about 500 m (the narrowest among currently known hybrid zones), and the proportion of hybrids was 24.3%. It was shown that in bimodal hybrid zones between chromosomal races of common shrew the width of sympatry zones varied from 0.5 to 13 km. This width does not correlate with the cytogenetic features of the hybrids, and seems to be determined by competitive relations between the races. The hybrid proportion is determined by the type of hybrid het erozygosity, and decreased in the race sympatry zone from 33-40 to 21.5-25.2%. The decrease of the hybrid proportion can be associated with the abnormal fertility of either the first generation, or the backcross hybrids.

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Section: Hybrid Adaptationmentioning

confidence: 99%