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Sex-Determination Mechanisms among Populations within Cryptic Species Complex of Calotes (Squamata: Agamidae: Draconinae)

1
Centre for Conservation Ecology and Genomics, Institute for Applied Ecology, University of Canberra, Bruce, ACT 2617, Australia
2
Animal Genomics and Bioresource Research Center (AGB Research Center), Faculty of Science, Kasetsart University, 50 Ngamwongwan, Chatuchak, Bangkok 10900, Thailand
3
Institute for Applied Ecology, University of Canberra, Bruce, ACT 2601, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Marta Farré-Belmonte
Received: 14 August 2021 / Revised: 23 September 2021 / Accepted: 29 September 2021 / Published: 6 October 2021
Sex-determination mechanisms and sex chromosomes are known to vary among reptile species and, in a few celebrated examples, within populations of the same species. The oriental garden lizard, Calotes versicolor, is one of the most intriguing species in this regard, exhibiting evidence of multiple sex-determination modes within a single species. One possible explanation for this unusual distribution is that in C. versicolor, different modes of sex determination are confined to a particular population or a species within a cryptic species complex. Here, we report on a population genetic analysis using SNP data from a methylation-sensitive DArT sequencing analysis and mitochondrial DNA data obtained from samples collected from six locations: three from Bangladesh and three from Thailand. Our aim was to determine whether C. versicolor is best described as a single species with multiple lineages or as multiple species, as well as if its sex-determination mechanisms vary within or between species. We present evidence that the latter possibility is the case and that C. versicolor comprises a complex of cryptic species. We also identify sex-linked markers within these species and use them to identify modes of sex determination. Overall, our results suggest that different sex-determination modes have evolved among closely related species and within populations of Agamid lizards. View Full-Text
Keywords: ND2 gene; sex-linked loci; SNP; sex chromosome heterogamety ND2 gene; sex-linked loci; SNP; sex chromosome heterogamety
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MDPI and ACS Style

Alam, S.M.I.; Prasongmaneerut, T.; Gleeson, D.; Georges, A.; Sarre, S.D.; Srikulnath, K.; Ezaz, T. Sex-Determination Mechanisms among Populations within Cryptic Species Complex of Calotes (Squamata: Agamidae: Draconinae). DNA 2021, 1, 49-67. https://0-doi-org.brum.beds.ac.uk/10.3390/dna1020006

AMA Style

Alam SMI, Prasongmaneerut T, Gleeson D, Georges A, Sarre SD, Srikulnath K, Ezaz T. Sex-Determination Mechanisms among Populations within Cryptic Species Complex of Calotes (Squamata: Agamidae: Draconinae). DNA. 2021; 1(2):49-67. https://0-doi-org.brum.beds.ac.uk/10.3390/dna1020006

Chicago/Turabian Style

Alam, Shayer M.I., Tulyawat Prasongmaneerut, Dianne Gleeson, Arthur Georges, Stephen D. Sarre, Kornsorn Srikulnath, and Tariq Ezaz. 2021. "Sex-Determination Mechanisms among Populations within Cryptic Species Complex of Calotes (Squamata: Agamidae: Draconinae)" DNA 1, no. 2: 49-67. https://0-doi-org.brum.beds.ac.uk/10.3390/dna1020006

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