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A forest dark :
A forest dark : an evolutionary history of Norway spruce
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- Sullivan, Alexis R., 1988- (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Umeå Plant Science Centre (UPSC)
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- Wang, Xiao-Ru, Professor (thesis advisor)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Street, Nathaniel, Associate Professor, 1979- (thesis advisor)
- Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
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- García-Gil, María Rosario, Associate Professor (thesis advisor)
- SLU
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- Oxelman, Bengt, Professor (opponent)
- Institutionen för biologi och miljövetenskap, Göteborgs universitet, Göteborg, Sverige
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(creator_code:org_t)
- ISBN 9789178552115
- Umeå : Umeå University, 2020
- English 68 s.
- Related links:
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Abstract
Subject headings
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- Embedded within the relationships among species is a dense forest of gene trees, each with a potentially unique and discordant history. Such widespread genealogical heterogeneity is expected, but embracing this hierarchy of discordance while reconstructing the histories of populations and species remains a major challenge.In this thesis, I studied the history of the genes and genomes contained within Norway spruce (Picea abies: Pinaceae), a forest tree distributed throughout boreal and montane Europe. I sequenced plastid genomes from all the commonly-recognized Picea species and developed a novel strategy to assemble the bacterial-sized mitochondrial genome of Norway spruce. Using multispecies coalescent network models, I reconstructed the relationships among populations of Norway spruce and the parapatric Siberian spruce (P. obovata) and distinguished between drift and hybridization as sources of phylogenetic discord.Norway spruce holds heterogenous histories at multiple levels of organization. Although organelle genomes are expected to be clonal and uniparentally inherited, the chloroplast genome held by Norway spruce originated after sexual recombination between two divergent lineages. In the mitochondrial genome, recombination creates a diverse population of genome arrangements subjected to drift and selection within individuals and populations. Genetic diversity among populations is shaped in nearly equal measure by divergence and hybridization. Norway spruce is discordance distilled.
Subject headings
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Keyword
- phylogenetics
- genome assembly
- recombination
- Picea
- hybridization
- mitogenome
- Norway spruce
- phylogeography
- phylogenetic networks
- plastome
Publication and Content Type
- vet (subject category)
- dok (subject category)
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