XY sex determination in a cnidarian.
BMC Biol
; 21(1): 32, 2023 02 13.
Article
in En
| MEDLINE
| ID: mdl-36782149
ABSTRACT
BACKGROUND:
Sex determination occurs across animal species, but most of our knowledge about its mechanisms comes from only a handful of bilaterian taxa. This limits our ability to infer the evolutionary history of sex determination within animals.RESULTS:
In this study, we generated a linkage map of the genome of the colonial cnidarian Hydractinia symbiolongicarpus and used it to demonstrate that this species has an XX/XY sex determination system. We demonstrate that the X and Y chromosomes have pseudoautosomal and non-recombining regions. We then use the linkage map and a method based on the depth of sequencing coverage to identify genes encoded in the non-recombining region and show that many of them have male gonad-specific expression. In addition, we demonstrate that recombination rates are enhanced in the female genome and that the haploid chromosome number in Hydractinia is n = 15.CONCLUSIONS:
These findings establish Hydractinia as a tractable non-bilaterian model system for the study of sex determination and the evolution of sex chromosomes.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sex Chromosomes
/
Hydrozoa
Type of study:
Prognostic_studies
Limits:
Animals
Language:
En
Journal:
BMC Biol
Journal subject:
BIOLOGIA
Year:
2023
Document type:
Article
Affiliation country: