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Unprecedented reorganization of holocentric chromosomes provides insights into the enigma of lepidopteran chromosome evolution
Stockholm University, Faculty of Science, Department of Zoology, Population Genetics. Uppsala University, Sweden.
Stockholm University, Faculty of Science, Department of Zoology, Population Genetics.
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2019 (English)In: Science Advances, E-ISSN 2375-2548, Vol. 5, no 6, article id eaau3648Article in journal (Refereed) Published
Abstract [en]

Chromosome evolution presents an enigma in the mega-diverse Lepidoptera. Most species exhibit constrained chromosome evolution with nearly identical haploid chromosome counts and chromosome-level gene collinearity among species more than 140 million years divergent. However, a few species possess radically inflated chromosomal counts due to extensive fission and fusion events. To address this enigma of constraint in the face of an exceptional ability to change, we investigated an unprecedented reorganization of the standard lepidopteran chromosome structure in the green-veined white butterfly (Pieris napi). We find that gene content in P. napi has been extensively rearranged in large collinear blocks, which until now have been masked by a haploid chromosome number close to the lepidopteran average. We observe that ancient chromosome ends have been maintained and collinear blocks are enriched for functionally related genes suggesting both a mechanism and a possible role for selection in determining the boundaries of these genome-wide rearrangements.

Place, publisher, year, edition, pages
2019. Vol. 5, no 6, article id eaau3648
National Category
Evolutionary Biology
Research subject
Zoology
Identifiers
URN: urn:nbn:se:su:diva-169763DOI: 10.1126/sciadv.aau3648ISI: 000473798500007OAI: oai:DiVA.org:su-169763DiVA, id: diva2:1325548
Funder
Wallenberg Foundations, 2012-3715, 2010-5341, 621-2012-4001Swedish Research Council, 2012.0058Available from: 2019-06-16 Created: 2019-06-16 Last updated: 2019-11-27Bibliographically approved

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Hill, JasonNeethiraj, Ramprasadde la Paz Celorio-Mancera, MariaDircksen, HeinrichKeehnen, NaomiPruisscher, PeterWiklund, ChristerWoronik, AlyssaNylin, SörenWheat, Christopher W.
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