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Transition in sexual system and sex chromosome evolution in the tadpole shrimp Triops cancriformis

Jenner, R. A.; Atkins, J.; Mathers, T. C.; Hammond, R. L.; Jenner, Ronald; Hänfling, B.; Atkins, Jennifer; Gómez, A.

Authors

R. A. Jenner

J. Atkins

T. C. Mathers

R. L. Hammond

Ronald Jenner

Dr Bernd Haenfling B.Haenfling@hull.ac.uk
Senior Lecturer/ Chair of the Evolutionary Biology Group (EvoHull)

Jennifer Atkins



Abstract

© 2015 Macmillan Publishers Limited All rights reserved. Transitions in sexual system and reproductive mode may affect the course of sex chromosome evolution, for instance by altering the strength of sexually antagonistic selection. However, there have been few studies of sex chromosomes in systems where such transitions have been documented. The European tadpole shrimp, Triops cancriformis, has undergone a transition from dioecy to androdioecy (a sexual system where hermaphrodites and males coexist), offering an excellent opportunity to test the impact of this transition on the evolution of sex chromosomes. To identify sex-linked markers, to understand mechanisms of sex determination and to investigate differences between sexual systems, we carried out a genome-wide association study using restriction site-associated DNA sequencing (RAD-seq) of 47 males, females and hermaphrodites from one dioecious and one androdioecious population. We analysed 22.9 Gb of paired-end sequences and identified and scored > 3000 high coverage novel genomic RAD markers. Presence-absence of markers, single-nucleotide polymorphism association and read depth identified 52 candidate sex-linked markers. We show that sex is genetically determined in T. cancriformis, with a ZW system conserved across dioecious and androdioecious populations and that hermaphrodites have likely evolved from females. We also show that the structure of the sex chromosomes differs strikingly, with a larger sex-linked region in the dioecious population compared with the androdioecious population.

Journal Article Type Article
Publication Date 2015-01
Journal Heredity
Print ISSN 0018-067X
Electronic ISSN 1365-2540
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 115
Issue 1
Pages 37-46
Institution Citation Mathers, T. C., Hammond, R. L., Jenner, R., Hänfling, B., Atkins, J., & Gómez, A. (2015). Transition in sexual system and sex chromosome evolution in the tadpole shrimp Triops cancriformis. Heredity, 115(1), 37-46. https://doi.org/10.1038/hdy.2015.10
DOI https://doi.org/10.1038/hdy.2015.10
Keywords Gonochoric, Hermaphroditism, Sexually antagonistic selection, RAD-seq, Androdioecy, Linkage
Publisher URL http://www.nature.com/hdy/journal/vaop/ncurrent/abs/hdy201510a.html
Copyright Statement This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Additional Information Copy of article first published in: Heredity, 2015, v.115.

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Copyright Statement
This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.







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