Chromosome-level baobab genome illuminates its evolutionary trajectory and environmental adaptation.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
12 Oct 2024
12 Oct 2024
Historique:
received:
14
04
2024
accepted:
03
10
2024
medline:
13
10
2024
pubmed:
13
10
2024
entrez:
12
10
2024
Statut:
epublish
Résumé
Baobab (Adansonia digitata) is a long-lived tree endemic to Africa with economic, ecological, and cultural importance, yet its genomic features are underexplored. Here, we report a chromosome-level reference genome anchored to 42 chromosomes for A. digitata, alongside draft assemblies for a sibling tree, two trees from distinct locations in Africa, and A. za from Madagascar. The baobab genome is uniquely rich in DNA transposons, which make up 33%, while LTR retrotransposons account for 10%. A. digitata experienced whole genome multiplication (WGM) around 30 million years ago (MYA), followed by a second WGM event 3-11 MYA, likely linked to autotetraploidy. Resequencing of 25 trees identify three subpopulations, with gene flow across West Africa distinct from East Africa. Gene enrichment and fixation index (Fst) analyses show baobab retained multiple circadian, flowering, and light-responsive genes, which likely support longevity through the UV RESISTANCE LOCUS 8 (UVR8) pathway. In sum, we provide genomic resources and insights for baobab breeding and conservation.
Identifiants
pubmed: 39396056
doi: 10.1038/s41467-024-53157-w
pii: 10.1038/s41467-024-53157-w
doi:
Substances chimiques
Retroelements
0
DNA Transposable Elements
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
8833Informations de copyright
© 2024. The Author(s).
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