Repository logo
 

Comparative chromosome painting in hummingbirds (Trochilidae).

Published version
Peer-reviewed

Type

Article

Change log

Authors

Degrandi, Tiago Marafiga  ORCID logo  https://orcid.org/0000-0003-1586-5405
Furo, Ivanete de Oliveira  ORCID logo  https://orcid.org/0000-0001-5404-6029
Oliveira, Edivaldo Herculano Correia de  ORCID logo  https://orcid.org/0000-0001-6315-3352
Ferguson-Smith, Malcolm A  ORCID logo  https://orcid.org/0000-0001-9372-1381

Abstract

Hummingbirds (Trochilidae) are one of the most enigmatic avian groups, and also among the most diverse, with approximately 360 recognized species in 106 genera, of which 43 are monotypic. This fact has generated considerable interest in the evolutionary biology of the hummingbirds, which is reflected in a number of DNA-based studies. However, only a few of them explored chromosomal data. Given this, the present study provides an analysis of the karyotypes of three species of Neotropical hummingbirds, Anthracothorax nigricollis (ANI), Campylopterus largipennis (CLA), and Hylocharis chrysura (HCH), in order to analyze the chromosomal processes associated with the evolution of the Trochilidae. The diploid number of ANI is 2n=80 chromosomes, while CLA and HCH have identical karyotypes, with 2n=78. Chromosome painting with Gallus gallus probes (GGA1-12) shows that the hummingbirds have a karyotype close to the proposed ancestral bird karyotype. Despite this, an informative rearrangement was detected: an in-tandem fusion between GGA7 and GGA9 found in CLA and HCH, but absent in ANI. A comparative analysis with the tree of life of the hummingbirds indicated that this fusion must have arisen following the divergence of a number of hummingbird species.

Description

Keywords

Karyotype, FISH, bird, chromosome, evolution

Journal Title

Genet Mol Biol

Conference Name

Journal ISSN

1415-4757
1678-4685

Volume Title

43

Publisher

FapUNIFESP (SciELO)