The genomes of Darwin's primroses reveal chromosome-scale adaptive introgression and differential permeability of species boundaries.
New Phytol
; 241(2): 911-925, 2024 Jan.
Article
em En
| MEDLINE
| ID: mdl-37921572
ABSTRACT
Introgression is an important source of genetic variation that can determine species adaptation to environmental conditions. Yet, definitive evidence of the genomic and adaptive implications of introgression in nature remains scarce. The widespread hybrid zones of Darwin's primroses (Primula elatior, Primula veris, and Primula vulgaris) provide a unique natural laboratory for studying introgression in flowering plants and the varying permeability of species boundaries. Through analysis of 650 genomes, we provide evidence of an introgressed genomic region likely to confer adaptive advantage in conditions of soil toxicity. We also document unequivocal evidence of chloroplast introgression, an important precursor to species-wide chloroplast capture. Finally, we provide the first evidence that the S-locus supergene, which controls heterostyly in primroses, does not introgress in this clade. Our results contribute novel insights into the adaptive role of introgression and demonstrate the importance of extensive genomic and geographical sampling for illuminating the complex nature of species boundaries.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Magnoliopsida
/
Primula
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article