Karyotype evolution in birds: From conventional staining to chromosome painting
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Publication Date
2018-04-01Journal Title
Genes
ISSN
2073-4425
Publisher
MDPI AG
Volume
9
Issue
4
Type
Article
This Version
VoR
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Kretschmer, R., Ferguson-Smith, M., & de Oliveira, E. (2018). Karyotype evolution in birds: From conventional staining to chromosome painting. Genes, 9 (4)https://doi.org/10.3390/genes9040181
Abstract
In this work we performed comparative chromosome painting using probes from Gallus gallus (GGA) Linnaeus, 1758 and Leucopternis albicollis (LAL) Latham, 1790 in Synallaxis frontalis Pelzeln, 1859 (Passeriformes, Furnariidae), an exclusively Neotropical species, in order to analyze whether the complex pattern of intrachromosomal rearrangements (paracentric and pericentric inversions) proposed for Oscines and Suboscines is shared with more basal species. S. frontalis has 82 chromosomes, similar to most Avian species, with a large number of microchromosomes and a few pairs of macrochromosomes. We found polymorphisms in pairs 1 and 3, where homologues were submetacentric and acrocentric. Hybridization of GGA probes showed syntenies in the majority of ancestral macrochromosomes, except for GGA1 and
GGA2, which hybridized to more than one pair of chromosomes each. LAL probes confirmed the occurrence
of intrachromosomal rearrangements in the chromosomes corresponding to GGA1q, as previously proposed
for species from the order Passeriformes. In addition, LAL probes suggest that pericentric inversions or
centromere repositioning were responsible for variations in the morphology of the heteromorphic pairs
1 and 3. Altogether, the analysis of our data on chromosome painting and the data published in other
Passeriformes highlights chromosomal changes that have occurred during the evolution of Passeriformes
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External DOI: https://doi.org/10.3390/genes9040181
This record's URL: https://www.repository.cam.ac.uk/handle/1810/274515
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