Non-disjunction frequency in male complex Robertsonian heterozygotes of the common shrew

• Autorzy: Fedyk S. , Chetnicki W.
• Języki publikacji: EN

Abstrakty

EN

Common shrews display two types of Robertsonian (Rb) heterozygosity: simple (where CIII configurations are formed at meiosis I) and complex (which have longer meiotic chains or rings). Based on an analysis of large sample sizes (over 100) of MII cells per specimen, we estimated the non-disjunction frequency in seven Rb homozygotes and 21 complex Rb heterozygotes (CIV and CV) of Sorex araneus Linnaeus, 1758. The analysis showed high betweenindividual variability. The mean level of non-disjunction in homozygotes (2.01%) was significantly lower than in CIV and CV heterozygotes (4.27% and 5.78%, respectively). The study demonstrated that non-disjunction frequency in male CIV and CV heterozygotes was similar to that in simple heterozygotes in the common shrew.

Słowa kluczowe

EN

male; Sorex araneus; hybrid zone; meiotic segregation; heterozygote; common shrew

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 2010
• Tom: 55
• Numer: 1
• Opis fizyczny: p.1-8,fig.,ref.

Twórcy

autor

Fedyk S.

• University of Bialystok, Swierkowa 20B, 19-950 Bialystok, Poland

autor

Chetnicki W.

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