Chromosomal analysis in Crotophaga ani (Aves, Cuculiformes) reveals extensive genomic reorganization and an unusual Z-autosome robertsonian translocation

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2020xmlui.mirage2.itemSummaryView.MetaData
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http://patua.iec.gov.br//handle/iec/4218xmlui.dri2xhtml.METS-1.0.item-author
Krestschmer, Rafael
Gunski, Ricardo José
Garnero, Analía del Valle
Freitas, Thales Renato Ochotorena de
Toma, Gustavo Akira
Cioffi, Marcelo de Bello
Oliveira, Edivaldo Herculano Corrêa de
O'Connor, Rebecca E
Griffin, Darren Karl
xmlui.dri2xhtml.METS-1.0.item-abstract
Abstract: Although cytogenetics studies in cuckoos (Aves, Cuculiformes) have demonstrated an
interesting karyotype variation, such as variations in the chromosome morphology and diploid
number, their chromosome organization and evolution, and relation with other birds are poorly
understood. Hence, we combined conventional and molecular cytogenetic approaches to investigate
chromosome homologies between chicken and the smooth-billed ani (Crotophaga ani). Our results
demonstrate extensive chromosome reorganization in C. ani, with interchromosomal rearrangements
involving macro and microchromosomes. Intrachromosomal rearrangements were observed in some
macrochromosomes, including the Z chromosome. The most evolutionary notable finding was a
Robertsonian translocation between the microchromosome 17 and the Z chromosome, a rare event in
birds. Additionally, the simple short repeats (SSRs) tested here were preferentially accumulated in the
microchromosomes and in the Z and W chromosomes, showing no relationship with the constitutive
heterochromatin regions, except in the W chromosome. Taken together, our results suggest that
the avian sex chromosome is more complex than previously postulated and revealed the role of
microchromosomes in the avian sex chromosome evolution, especially cuckoos.
xmlui.dri2xhtml.METS-1.0.item-citation
KRESTSCHMER, Rafael et al. Chromosomal analysis in crotophaga ani (Aves, Cuculiformes) reveals extensive genomic reorganization and an unusual Z-Autosome robertsonian translocation. Cells, v. 10, n. 1, p. 1-13, Dec. 2020.xmlui.dri2xhtml.METS-1.0.item-decsPrimary
Aves / genéticaGenoma
Cromossomos Sexuais / genética
Rearranjo Gênico
Análise Citogenética