ID | 65708 |
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Author |
Horiuchi, Ayano
Graduate School of Environmental and Life Science, Okayama University
Masuda, Kanae
Graduate School of Environmental and Life Science, Okayama University
Shirasawa, Kenta
Department of Frontier Research and Development, Kazusa DNA Research Institute
Onoue, Noriyuki
Institute of Fruit Tree and Tea Science, NARO
Fujita, Naoko
Graduate School of Environmental and Life Science, Okayama University
Ushijima, Koichiro
Graduate School of Environmental and Life Science, Okayama University
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Akagi, Takashi
Graduate School of Environmental and Life Science, Okayama University
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Abstract | Plants have evolved sex chromosomes independently in many lineages, and loss of separate sexes can also occur. In this study, we assembled a monoecious recently hexaploidized persimmon (Diospyros kaki), in which the Y chromosome has lost the maleness-determining function. Comparative genomic analysis of D. kaki and its dioecious relatives uncovered the evolutionary process by which the nonfunctional Y chromosome (or Y-monoecy) was derived, which involved silencing of the sex-determining gene, OGI, approximately 2 million years ago. Analyses of the entire X and Y-monoecy chromosomes suggested that D. kaki's nonfunctional male-specific region of the Y chromosome (MSY), which we call a post-MSY, has conserved some characteristics of the original functional MSY. Specifically, comparing the functional MSY in Diospyros lotus and the nonfunctional "post-MSY" in D. kaki indicated that both have been rapidly rearranged, mainly via ongoing transposable element bursts, resembling structural changes often detected in Y-linked regions, some of which can enlarge the nonrecombining regions. The recent evolution of the post-MSY (and possibly also MSYs in dioecious Diospyros species) therefore probably reflects these regions' ancestral location in a pericentromeric region, rather than the presence of male-determining genes and/or genes controlling sexually dimorphic traits.
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Keywords | sex chromosome
genome assembly
monoecy
transposable elements
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Published Date | 2023-07-07
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Publication Title |
Molecular Biology and Evolution
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Volume | volume40
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Issue | issue7
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Publisher | Oxford University Press
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Start Page | msad151
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ISSN | 0737-4038
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NCID | AA10643104
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Content Type |
Journal Article
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language |
English
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OAI-PMH Set |
岡山大学
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Copyright Holders | © The Author(s) 2023.
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File Version | publisher
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PubMed ID | |
DOI | |
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Related Url | isVersionOf https://doi.org/10.1093/molbev/msad151
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License | https://creativecommons.org/licenses/by-nc/4.0/
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Citation | Ayano Horiuchi and others, Ongoing Rapid Evolution of a Post-Y Region Revealed by Chromosome-Scale Genome Assembly of a Hexaploid Monoecious Persimmon (Diospyros kaki), Molecular Biology and Evolution, Volume 40, Issue 7, July 2023, msad151, https://doi.org/10.1093/molbev/msad151
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Funder Name |
Japan Science and Technology Agency
Japan Society for the Promotion of Science
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助成番号 | JPMJPR20Q1
22H02339
22H05172
22H05173
22H05181
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