Evolution and expression patterns of the neo-sex chromosomes of the crested ibis.
Nat Commun
; 15(1): 1670, 2024 Feb 23.
Article
em En
| MEDLINE
| ID: mdl-38395916
ABSTRACT
Bird sex chromosomes play a unique role in sex-determination, and affect the sexual morphology and behavior of bird species. Core waterbirds, a major clade of birds, share the common characteristics of being sexually monomorphic and having lower levels of inter-sexual conflict, yet their sex chromosome evolution remains poorly understood. Here, by we analyse of a chromosome-level assembly of a female crested ibis (Nipponia nippon), a typical core waterbird. We identify neo-sex chromosomes resulting from fusion of microchromosomes with ancient sex chromosomes. These fusion events likely occurred following the divergence of Threskiornithidae and Ardeidae. The neo-W chromosome of the crested ibis exhibits the characteristics of slow degradation, which is reflected in its retention of abundant gametologous genes. Neo-W chromosome genes display an apparent ovary-biased gene expression, which is largely driven by genes that are retained on the crested ibis W chromosome but lost in other bird species. These results provide new insights into the evolutionary history and expression patterns for the sex chromosomes of bird species.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Cromossomos Sexuais
/
Aves
Limite:
Animals
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article