Robertsonian polymorphism in chromosomes of Oryzomys subflavus(Rodentia, Cricetidae)

1 January 1981

journal article
research article
Published by S. Karger AG in Cytogenetic and Genome Research

Vol. 31 (2) , 33-39
https://doi.org/10.1159/000131623

Abstract

Eighty-four specimens of Oryzomys subflavus, collected in the State of Pernambuco, Brazil, were studied. A Robertsonian chromosome polymorphism, characterized by a varying diploid number of 50, 49, 48, and 46, was found. All the specimens showed a chromosome arm number of 56. G-banding patterns in somatic cells allowed identification of the chromosome pairs (2, 3, 5, and 7) involved in centric fusion. C-banding revealed the presence of constitutive heterochromatin near the centromere the X chromosome and those of the autosomes. The Y chromosome presented a large heterochromatic block in the distal portion of its long arm.

Keywords

This publication has 2 references indexed in Scilit:

Chain Processes in Chromosomal Speciation
Systematic Zoology, 1978
A Colchicine, Hypotonic Citrate, Squash Sequence for Mammalian Chromosomes
Stain Technology, 1956