Meiotic analysis of XX/XY and neo-XX/XY sex chromosomes in Phyllostomidae by cross-species chromosome painting revealing a common chromosome 15-XY rearrangement in Stenodermatinae.

Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology
R C R NoronhaJulio Cesar Pieczarka

Abstract

We analyzed the meiotic behavior of the sex chromosomes of the bats Glossophaga soricina (XX/XY), Artibeus cinereus and Uroderma magnirostrum (neo-XX/XY) using multicolor FISH. The X chromosome and pair 15 autosome probes are from Phyllostomus hastatus and the Y from Carollia brevicauda. On both species with the neo-XX/XY system, the autosome translocated to the sex chromosomes is the pair 15 in P. hastatus, a synapomorphy. The analysis of meiosis confirms that the X and Y have a pseudo-autosomal region, with a typical end-to-end pairing. The autosomal regions of the neo-XX/XY shows different levels of condensation when compared to the original XX/XY. The compound system presented a characteristic shape, as if it was a closed ring with a tail. The ring represents the non-paired segments of the X and Y and the small pairing region of the original sex chromosomes. The tail corresponds to the pairing of the 15 P. hastatus autosomal bivalent, which are translocated to the sex chromosomes. Probably the non-pairing is responsible for the meiotic silencing of these segments.

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Citations

Jun 19, 2013·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·J C PieczarkaM A Ferguson-Smith
May 4, 2016·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Miluse VozdovaJiri Rubes
Jun 5, 2016·BMC Evolutionary Biology·Anderson José Baia GomesJulio Cesar Pieczarka
Oct 14, 2017·Genes·Cibele G Sotero-CaioMarianne Volleth
Apr 20, 2021·Comparative Cytogenetics·Ricardo Firmino de SousaKarina de Cassia Faria

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