TY - JOUR
T1 - Viviparous Reptile Regarded to Have Temperature-Dependent Sex Determination Has Old XY Chromosomes
AU - Cornejo-Páramo, Paola
AU - Dissanayake, Duminda S.B.
AU - Lira-Noriega, Andrés
AU - Martínez-Pacheco, Mónica L.
AU - Acosta, Armando
AU - Ramírez-Suástegui, Ciro
AU - Méndez-de-la-Cruz, Fausto R.
AU - Székely, Tamás
AU - Urrutia, Araxi O.
AU - Georges, Arthur
AU - Cortez, Diego
N1 - Funding Information:
This research was supported by a Frontiers in Science CONACYT grant (No. FC-2016/1682) and a Royal Society Newton Advanced Fellowship (No. NA160564) to D.C., T.S., and A.O.U.; an Australian Research Council (DP170101147) awarded to A.G.; a NKFIH-2558-1/2015 and ′LVONAL-KKP 126949 to T.S.; a NERC grant (NE/P004121/1), a Royal Society Dorothy Hodgkin Research Fellowship (DH071902), and a CONACyT-AMC-Royal Society Newton mobility grant to A.O.U.; travel grants SEP-UNAM-FUNAM Programa de Capacitación en Métodos de Investigación/2016 to P.C.-P. and C.R.-S.; and a special grant from the Undergraduate Program on Genomic Sciences—UNAM to P.C.-P. We thank the UNAM, the Australian Research Council, the University of Canberra, the University of Bath, CONACYT and the Royal Society for their support.
Publisher Copyright:
© The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
PY - 2020/6/1
Y1 - 2020/6/1
N2 - The water skinks Eulamprus tympanum and Eulamprus heatwolei show thermally induced sex determination where elevated temperatures give rise to male offspring. Paradoxically, Eulamprus species reproduce in temperatures of 12-15 °C making them outliers when compared with reptiles that use temperature as a cue for sex determination. Moreover, these two species are among the very few viviparous reptiles reported to have thermally induced sex determination. Thus, we tested whether these skinks possess undetected sex chromosomes with thermal override. We produced transcriptome and genome data for E. heatwolei. We found that E. heatwolei presents XY chromosomes that include 14 gametologs with regulatory functions. The Y chromosomal region is 79-116 Myr old and shared between water and spotted skinks. Our work provides clear evidence that climate could be useful to predict the type of sex determination systems in reptiles and it also indicates that viviparity is strictly associated with sex chromosomes.
AB - The water skinks Eulamprus tympanum and Eulamprus heatwolei show thermally induced sex determination where elevated temperatures give rise to male offspring. Paradoxically, Eulamprus species reproduce in temperatures of 12-15 °C making them outliers when compared with reptiles that use temperature as a cue for sex determination. Moreover, these two species are among the very few viviparous reptiles reported to have thermally induced sex determination. Thus, we tested whether these skinks possess undetected sex chromosomes with thermal override. We produced transcriptome and genome data for E. heatwolei. We found that E. heatwolei presents XY chromosomes that include 14 gametologs with regulatory functions. The Y chromosomal region is 79-116 Myr old and shared between water and spotted skinks. Our work provides clear evidence that climate could be useful to predict the type of sex determination systems in reptiles and it also indicates that viviparity is strictly associated with sex chromosomes.
KW - Eulamprus heatwolei
KW - genetic sex determination systems
KW - temperature-dependent sex determination
KW - viviparous reptiles
KW - water skinks
UR - http://www.scopus.com/inward/record.url?scp=85087110993&partnerID=8YFLogxK
U2 - 10.1093/gbe/evaa104
DO - 10.1093/gbe/evaa104
M3 - Article
C2 - 32433751
AN - SCOPUS:85087110993
SN - 1759-6653
VL - 12
SP - 924
EP - 930
JO - Genome Biology and Evolution
JF - Genome Biology and Evolution
IS - 6
ER -