Genomic evidence of introgression and adaptation in a model subtropical tree species, Eucalyptus grandis
Date
2020
Authors
Mostert-O'Neill, Marja Mirjam
Reynolds, Sharon Melissa
Acosta, Juan J
Lee, David J.
Borevitz, Justin
Myburg, Alexander A.
Journal Title
Journal ISSN
Volume Title
Publisher
Blackwell Publishing Ltd
Abstract
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.
Description
Keywords
ancestry mapping, environmental association, introgression, population genomics
Citation
Collections
Source
Molecular Ecology
Type
Journal article
Book Title
Entity type
Access Statement
License Rights
Restricted until
2099-12-31
Downloads
File
Description