Open AccessCytogenetic analysis of four central Amazonian species of Colostethus (Anura – Dendrobatidae) with a diploid complement of 22 chromosomes
Author(s) -
CRISTINA P. VEIGAMECELLO ANA,
P. LIMA ALBERTINA,
M. RECCOPIMENTEL SHIRLEI
Publication year - 2003
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.2003.01805.x
Subject(s) - biology , karyotype , ploidy , heterochromatin , cytotaxonomy , chromosome , genetics , cytogenetics , zoology , evolutionary biology , gene
Colostethus marchesianus from the type locality and three related species had 2n=22 chromosomes, which differed from most other Colostethus species that have 2n=24 chromosomes. The species analyzed were morphologically similar and showed a conservative karyotype, although they could be distinguished from each other by their C‐banding pattern. Additional NOR sites, heteromorphism in NOR size and heterochromatin, and an additional rDNA site detected by FISH, were observed. These data suggest that chromosomal rearrangements and hetrochromatin‐related events may have contributed to the karyotype differentiation of these Colostethus.