Title:

B chromosome system in populations of Oryzomys flavescens (Rodentia, Cricetidae) from southern Brazil

Creator:

Sbalqueiro, I. J. ; Mattevi, M. S. ; Oliveira, L. F. B. ; Solano, M. J. V.

Place of publishing:

Białowieża

Date issued/created:

1991

Description:

Chromosome studies on 49 specimens collected from 11 Brazilian populations of the rodent species Oryzomys flavescens (Waterhouse, 1837) disclosed 2n=64 in 25 individuals, 2n=65 in 9, 2n=66 in 12, and 2n=64/65 mosaics in 3. This chromosome variation was due to the occurence of one or two extra small heterochromatic acrocentrics, interpreted as B chromosomes. Comparisons made between our data and those previously reported for O. flavescens from Uruguay and Argentina, O. fornesi from Paraguay, and Oryzomys sp. from São Paulo, Brazil, revealed that these taxa share similar karyotypes, suggesting they belong to a single cytotaxonomic group.

Type of object:

Journal/Article

Subject and Keywords:

B chromosomes variation ; Brazil ; Oryzomys flavescens ; population ; Brazylia ; gryzonie

Relation:

Acta Theriologica

Volume:

36

Issue:

1-2

Start page:

193

End page:

199

Resource type:

Text

Detailed Resource Type:

Article

Format:

application/pdf

Source:

click here to follow the link

Language:

eng ; Sum. eng.

Rights:

Rights Reserved - Free Access

Terms of use:

Copyright-protected material. May be used within the limits of statutory user freedoms

Digitizing institution:

Mammal Research Institute of the Polish Academy of Sciences

Original in:

Library of the Mammal Research Institute Polish Academy of Sciences

Projects co-financed by:

Programme Innovative Economy, 2010-2014, Priority Axis 2. R&D infrastructure ; European Union. European Regional Development Fund

Access:

Open