Berner, Daniel and Ruffener, Simona and Blattner, Lucas A.. (2023) Chromosome-Level Assemblies of the Pieris mannii Butterfly Genome Suggest Z-Origin and Rapid Evolution of the W Chromosome. Genome Biology and Evolution, 15 (6). evad111.
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Official URL: https://edoc.unibas.ch/95095/
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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.
Faculties and Departments: | 05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Evolutionary Biology (Salzburger) |
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UniBasel Contributors: | Blattner, Lucas and Berner, Daniel and Ruffener, Simona Corina |
Item Type: | Article, refereed |
Article Subtype: | Research Article |
ISSN: | 1759-6653 |
Note: | Publication type according to Uni Basel Research Database: Journal article |
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Last Modified: | 03 Jul 2023 09:30 |
Deposited On: | 03 Jul 2023 09:30 |
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