期刊
MOLECULAR ECOLOGY
卷 30, 期 3, 页码 625-638出版社
WILEY
DOI: 10.1111/mec.15615
关键词
ancestry mapping; environmental association; introgression; population genomics
资金
- National Research Foundation of South Africa [UID 97911]
- Technology and Human Resources for Industry Programme [UID 96413]
- South African Department of Science and Technology and Technology Innovation Agency
- Forestry Sector Innovation Fund
This study used population genomics to investigate the genetic consequences of adaptation to changing environments in Eucalyptus grandis, revealing extensive interspecific introgression in response to increased aridity. It also identified potentially adaptive genetic variation associated with environmental SNP markers, as well as genes linked to stress responses enriched in the population.
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 ofEucalyptus 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.
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