The deep conservation of the Lepidoptera Z chromosome suggests a non canonical origin of the W

C. Fraisse, M.A. Picard, B. Vicoso, Nature Communications 8 (2017).

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Journal Article | Published | English
Abstract
Moths and butterflies (Lepidoptera) usually have a pair of differentiated WZ sex chromosomes. However, in most lineages outside of the division Ditrysia, as well as in the sister order Trichoptera, females lack a W chromosome. The W is therefore thought to have been acquired secondarily. Here we compare the genomes of three Lepidoptera species (one Dytrisia and two non-Dytrisia) to test three models accounting for the origin of the W: (1) a Z-autosome fusion; (2) a sex chromosome turnover; and (3) a non-canonical mechanism (e.g., through the recruitment of a B chromosome). We show that the gene content of the Z is highly conserved across Lepidoptera (rejecting a sex chromosome turnover) and that very few genes moved onto the Z in the common ancestor of the Ditrysia (arguing against a Z-autosome fusion). Our comparative genomics analysis therefore supports the secondary acquisition of the Lepidoptera W by a non-canonical mechanism, and it confirms the extreme stability of well-differentiated sex chromosomes.
Publishing Year
Date Published
2017-12-01
Journal Title
Nature Communications
Volume
8
Issue
1
Article Number
1486
ISSN
IST-REx-ID

Cite this

Fraisse C, Picard MA, Vicoso B. The deep conservation of the Lepidoptera Z chromosome suggests a non canonical origin of the W. Nature Communications. 2017;8(1). doi:10.1038/s41467-017-01663-5
Fraisse, C., Picard, M. A., & Vicoso, B. (2017). The deep conservation of the Lepidoptera Z chromosome suggests a non canonical origin of the W. Nature Communications, 8(1). https://doi.org/10.1038/s41467-017-01663-5
Fraisse, Christelle, Marion A Picard, and Beatriz Vicoso. “The Deep Conservation of the Lepidoptera Z Chromosome Suggests a Non Canonical Origin of the W.” Nature Communications 8, no. 1 (2017). https://doi.org/10.1038/s41467-017-01663-5.
C. Fraisse, M. A. Picard, and B. Vicoso, “The deep conservation of the Lepidoptera Z chromosome suggests a non canonical origin of the W,” Nature Communications, vol. 8, no. 1, 2017.
Fraisse C, Picard MA, Vicoso B. 2017. The deep conservation of the Lepidoptera Z chromosome suggests a non canonical origin of the W. Nature Communications. 8(1).
Fraisse, Christelle, et al. “The Deep Conservation of the Lepidoptera Z Chromosome Suggests a Non Canonical Origin of the W.” Nature Communications, vol. 8, no. 1, 1486, Nature Publishing Group, 2017, doi:10.1038/s41467-017-01663-5.
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