Tracing animal genomic evolution with the chromosomal-level assembly of the freshwater sponge Ephydatia muelleri.
Nat Commun
; 11(1): 3676, 2020 07 27.
Article
em En
| MEDLINE
| ID: mdl-32719321
ABSTRACT
The genomes of non-bilaterian metazoans are key to understanding the molecular basis of early animal evolution. However, a full comprehension of how animal-specific traits, such as nervous systems, arose is hindered by the scarcity and fragmented nature of genomes from key taxa, such as Porifera. Ephydatia muelleri is a freshwater sponge found across the northern hemisphere. Here, we present its 326 Mb genome, assembled to high contiguity (N50 9.88 Mb) with 23 chromosomes on 24 scaffolds. Our analyses reveal a metazoan-typical genome architecture, with highly shared synteny across Metazoa, and suggest that adaptation to the extreme temperatures and conditions found in freshwater often involves gene duplication. The pancontinental distribution and ready laboratory culture of E. muelleri make this a highly practical model system which, with RNAseq, DNA methylation and bacterial amplicon data spanning its development and range, allows exploration of genomic changes both within sponges and in early animal evolution.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poríferos
/
Mapeamento Cromossômico
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Cromossomos
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Evolução Molecular
Limite:
Animals
Idioma:
En
Revista:
Nat Commun
Ano de publicação:
2020
Tipo de documento:
Article