Abstract
The genetic landscape of adaptive variation in native Eucalyptus grandis
Abstracts of Eucalypt genetics, p.20
Eucalypt genetics (EucGen19): fundamental and applied research in a post-genome era (Hobart, Australia, 18-Feb-2019–21-Feb-2019)
2019
Abstract
Extant genomes tell the tale of millennia of abiotic and biotic pressures that have moulded populations through natural selection. With the availability of powerful genomic resources for eucalypts, we can begin to decipher the genetic landscape of adaptive variation using population genomics, which relies on the principle that regions of the genome affected by selection for adaptive traits would have different patterns of inheritance compared to selectively neutral regions. We use this premise to investigate the population structure and patterns of genetic differentiation in terms of neutral and adaptive evolutionary forces in the natural species range of Eucalyptus grandis. E. grandis and its interspecific hybrids have been the most successful hardwood species for forest tree breeding in South Africa for more than 80 years. Despite its commercial importance, little is known about the genetic diversity in the natural range, the genetic variation maintained in breeding programmes, and the traits and genes underlying genotype by environment interactions (GEI). Using the EUChip60K DNA marker chip, we profiled ~64 000 single nucleotide polymorphisms (SNPs) of which ~26 000 were informative in 596 E. grandis individuals from the natural range in Australia. We used outlier detection and environmental association analysis to identify SNP markers with inheritance patterns that deviate from the genomic surrounds to define the neutral and adaptively enriched genetic spaces. These were interrogated using multivariate and Bayesian approaches to uncover population differentiation. This study represents the first step towards deciphering the genomic intricacies that underpin GEI in E. grandis.
Details
- Title
- The genetic landscape of adaptive variation in native Eucalyptus grandis
- Authors
- Marja M O'Neill (Author)S Melissa Reynolds (Author)David J Lee (Author) - University of the Sunshine CoastJuan J Acosta (Author)Justin O Borevitz (Author)Alexander A Myburg (Author)
- Contributors
- R C Jones (Editor)Dorothy A Steane (Editor)P Tilyard (Editor)R E Vaillancourt (Editor)R L Andrew (Editor)P D Rymer (Editor)Brad M Potts (Editor)
- Publication details
- Abstracts of Eucalypt genetics, p.20
- Conference details
- Eucalypt genetics (EucGen19): fundamental and applied research in a post-genome era (Hobart, Australia, 18-Feb-2019–21-Feb-2019)
- Publisher
- University of Tasmania
- Date published
- 2019
- Organisation Unit
- Tropical Forests and People Research Centre; University of the Sunshine Coast, Queensland; Forest Industries Research Centre; Forest Research Institute
- Language
- English
- Record Identifier
- 99450773402621
- Output Type
- Abstract
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