NDLI: Degenerated, Undifferentiated, Rearranged, Lost: High Variability of Sex Chromosomes in Geometridae (Lepidoptera) Identified by Sex Chromatin

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Degenerated, Undifferentiated, Rearranged, Lost: High Variability of Sex Chromosomes in Geometridae (Lepidoptera) Identified by Sex Chromatin

Content Provider	MDPI
Author	Martina, Hejníčková Martina, Dalíková Pavel, Potocký Svatava, Kubíčková Magda, Zrzavá Tammaru, Toomas Trehubenko, Marharyta Marec, František
Copyright Year	2021
Description	Sex chromatin is a conspicuous body that occurs in polyploid nuclei of most lepidopteran females and consists of numerous copies of the W sex chromosome. It is also a cytogenetic tool used to rapidly assess the W chromosome presence in Lepidoptera. However, certain chromosomal features could disrupt the formation of sex chromatin and lead to the false conclusion that the W chromosome is absent in the respective species. Here we tested the sex chromatin presence in 50 species of Geometridae. In eight selected species with either missing, atypical, or normal sex chromatin patterns, we performed a detailed karyotype analysis by means of comparative genomic hybridization (CGH) and fluorescence in situ hybridization (FISH). The results showed a high diversity of W chromosomes and clarified the reasons for atypical sex chromatin, including the absence or poor differentiation of W, rearrangements leading to the neo-W emergence, possible association with the nucleolus, and the existence of multiple W chromosomes. In two species, we detected intraspecific variability in the sex chromatin status and sex chromosome constitution. We show that the sex chromatin is not a sufficient marker of the W chromosome presence, but it may be an excellent tool to pinpoint species with atypical sex chromosomes.
Starting Page	2230
e-ISSN	20734409
DOI	10.3390/cells10092230
Journal	Cells
Issue Number	9
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2021-08-28
Access Restriction	Open
Subject Keyword	Cells Entomology Sex Chromosome Evolution W Chromosome Neo-sex Chromosomes Sex Chromatin Lepidoptera Geometridae Comparative Genomic Hybridization Intraspecific Chromosomal Variability
Content Type	Text
Resource Type	Article

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