Genomic evidence of introgression and adaptation in a model subtropical tree species, Eucalyptus grandis

The genetic consequences of adaptation to changing environments can be deciphered using population genomics, which may help predict species' responses to global climate change. Towards this, we used genome‐wide SNP marker analysis to determine population structure and patterns of genetic differ...

Full description

Saved in:
Bibliographic Details
Published in:Molecular ecology 2021-02, Vol.30 (3), p.625-638
Main Authors: Mostert‐O'Neill, Marja Mirjam, Reynolds, Sharon Melissa, Acosta, Juan Jose, Lee, David John, Borevitz, Justin O., Myburg, Alexander Andrew
Format: Article
Language:English
Subjects:
Adaptation
ancestry mapping
Aridity
Biomarkers
Changing environments
Climate change
environmental association
Eucalyptus
Eucalyptus grandis
Gene mapping
Genetic diversity
Interspecific
introgression
Plant species
population genomics
Population structure
Single-nucleotide polymorphism
Species
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The genetic consequences of adaptation to changing environments can be deciphered using population genomics, which may help predict species' responses to global climate change. Towards this, we used genome‐wide SNP marker analysis to determine population structure and patterns of genetic differentiation in terms of neutral and adaptive genetic variation in the natural range of Eucalyptus grandis, a widely cultivated subtropical and temperate species, serving as genomic reference for the genus. We analysed introgression patterns at subchromosomal resolution using a modified ancestry mapping approach and identified provenances with extensive interspecific introgression in response to increased aridity. Furthermore, we describe potentially adaptive genetic variation as explained by environment‐associated SNP markers, which also led to the discovery of what is likely a large structural variant. Finally, we show that genes linked to these markers are enriched for biotic and abiotic stress responses.
ISSN:0962-1083
1365-294X
DOI:10.1111/mec.15615