Differences in Homomorphic Sex Chromosomes Are Associated with Population Divergence in Sex Determination in Carinascincus ocellatus (Scincidae: Lygosominae)
| Autor: | Christopher P. Burridge, Peta L Hill, Erik Wapstra, Tariq Ezaz, Foyez Shams |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Subfamily Population Biology GSD Y chromosome 010603 evolutionary biology 01 natural sciences Homology (biology) Intraspecific competition 03 medical and health sciences Niveoscincus TSD education lcsh:QH301-705.5 Lygosominae education.field_of_study digestive oral and skin physiology Chromosome Karyotype General Medicine biology.organism_classification karyotype 030104 developmental biology lcsh:Biology (General) Evolutionary biology cryptic sex chromosomes |
| Zdroj: | Cells Volume 10 Issue 2 Cells, Vol 10, Iss 291, p 291 (2021) |
| ISSN: | 2073-4409 |
| DOI: | 10.3390/cells10020291 |
| Popis: | Sex determination directs development as male or female in sexually reproducing organisms. Evolutionary transitions in sex determination have occurred frequently, suggesting simple mechanisms behind the transitions, yet their detail remains elusive. Here we explore the links between mechanisms of transitions in sex determination and sex chromosome evolution at both recent and deeper temporal scales (< 1 Myr ~79 Myr). We studied a rare example of a species with intraspecific variation in sex determination, Carinascincus ocellatus, and a relative, Liopholis whitii, using c-banding and mapping of repeat motifs and a custom Y chromosome probe set to identify the sex chromosomes. We identified both unique and conserved regions of the Y chromosome among C. ocellatus populations differing in sex determination. There was no evidence for homology of sex chromosomes between C. ocellatus and L. whitii, suggesting independent evolutionary origins. We discuss sex chromosome homology between members of the subfamily Lygosominae and propose links between sex chromosome evolution, sex determination transitions, and karyotype evolution. |
| Databáze: | OpenAIRE |
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