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Chromosome-Level Assemblies of the Pieris mannii Butterfly Genome Suggest Z-Origin and Rapid Evolution of the W Chromosome
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
ID 4694165
Author(s) Berner, Daniel; Ruffener, Simona; Blattner, Lucas A.
Author(s) at UniBasel Blattner, Lucas
Berner, Daniel
Ruffener, Simona Corina
Year 2023
Title Chromosome-Level Assemblies of the Pieris mannii Butterfly Genome Suggest Z-Origin and Rapid Evolution of the W Chromosome
Journal Genome Biology and Evolution
Volume 15
Number 6
Pages / Article-Number evad111
Mesh terms Animals; Butterflies, genetics; Sex Chromosomes, genetics; Moths, genetics; Genome; Evolution, Molecular
Abstract The insect order Lepidoptera (butterflies and moths) represents the largest group of organisms with ZW/ZZ sex determination. While the origin of the Z chromosome predates the evolution of the Lepidoptera, the W chromosomes are considered younger, but their origin is debated. To shed light on the origin of the lepidopteran W, we here produce chromosome-level genome assemblies for the butterfly Pieris mannii and compare the sex chromosomes within and between P. mannii and its sister species Pieris rapae . Our analyses clearly indicate a common origin of the W chromosomes of the two Pieris species and reveal similarity between the Z and W in chromosome sequence and structure. This supports the view that the W in these species originates from Z-autosome fusion rather than from a redundant B chromosome. We further demonstrate the extremely rapid evolution of the W relative to the other chromosomes and argue that this may preclude reliable conclusions about the origins of W chromosomes based on comparisons among distantly related Lepidoptera. Finally, we find that sequence similarity between the Z and W chromosomes is greatest toward the chromosome ends, perhaps reflecting selection for the maintenance of recognition sites essential to chromosome segregation. Our study highlights the utility of long-read sequencing technology for illuminating chromosome evolution.
ISSN/ISBN 1759-6653
Full Text on edoc No
Digital Object Identifier DOI 10.1093/gbe/evad111
PubMed ID
Document type (ISI) Journal Article

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