Comparative genomics reveals the dynamics of chromosome evolution in Lepidoptera.
Nat Ecol Evol
; 8(4): 777-790, 2024 Apr.
Article
em En
| MEDLINE
| ID: mdl-38383850
ABSTRACT
Chromosomes are a central unit of genome organization. One-tenth of all described species on Earth are butterflies and moths, the Lepidoptera, which generally possess 31 chromosomes. However, some species display dramatic variation in chromosome number. Here we analyse 210 chromosomally complete lepidopteran genomes and show that the chromosomes of extant lepidopterans are derived from 32 ancestral linkage groups, which we term Merian elements. Merian elements have remained largely intact through 250 million years of evolution and diversification. Against this stable background, eight lineages have undergone extensive reorganization either through numerous fissions or a combination of fusion and fission events. Outside these lineages, fusions are rare and fissions are rarer still. Fusions often involve small, repeat-rich Merian elements and the sex-linked element. Our results reveal the constraints on genome architecture in Lepidoptera and provide a deeper understanding of chromosomal rearrangements in eukaryotic genome evolution.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Borboletas
/
Mariposas
Limite:
Animals
Idioma:
En
Revista:
Nat Ecol Evol
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Reino Unido