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Growth and Its Relationship to Individual Genetic Diversity of Mountain Hemlock (Tsuga mertensiana) at Alpine Treeline in Alaska: Combining Dendrochronology and Genomics

dc.contributor.authorJohnson, Jeremy
dc.contributor.authorChhetri, Parveen
dc.contributor.authorKrutovsky, Konstantin
dc.contributor.authorCairns, David
dc.date.accessioned2019-12-17T13:08:58Z
dc.date.available2019-12-17T13:08:58Z
dc.date.issued2017de
dc.relation.ISSN1999-4907de
dc.identifier.urihttp://resolver.sub.uni-goettingen.de/purl?gs-1/17016
dc.description.abstractGlobally, alpine treelines are characterized as temperature-limited environments with strong controls on tree growth. However, at local scales spatially heterogeneous environments generally have more variable impacts on individual patterns of tree growth. In addition to the landscape spatial heterogeneity there is local variability in individual tree genetic diversity (level of individual heterozygosity). It has been hypothesized that higher individual heterozygosity will result in more consistent patterns of growth. In this article, we combine genomics and dendrochronology to explore the relationship between individual genetic diversity and tree growth at a mountain hemlock (Tsuga mertensiana Bong. Carr) alpine treeline on the Kenai Peninsula, Alaska, USA.We correlated average observed individual heterozygosity with average tree-ring width and variance in tree-ring width within individuals to test the hypothesis that trees with higher individual heterozygosity will also have more consistent growth patterns, suggesting that they may be more resilient to climate and environmental fluctuations at the alpine treeline. Our results showed that there was no significant relationship between tree growth and individual heterozygosity. However, there was a significant positive relationship between average tree-ring width and variance in tree-ring width implying that overall, fast growing trees in stressful environments, such as the alpine treeline, grow unstably regardless of the level of individual heterozygosity.de
dc.language.isoengde
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectgenomics; high-throughput sequencing; homeostasis; individual heterozygosity;mountain ecosystems; tree-ringsde
dc.subject.ddc570
dc.titleGrowth and Its Relationship to Individual Genetic Diversity of Mountain Hemlock (Tsuga mertensiana) at Alpine Treeline in Alaska: Combining Dendrochronology and Genomicsde
dc.typejournalArticlede
dc.identifier.doi10.3390/f8110418
dc.type.versionpublishedVersionde
dc.relation.eISSN1999-4907
dc.bibliographicCitation.volume8de
dc.bibliographicCitation.issue11de
dc.type.subtypejournalArticle
dc.bibliographicCitation.articlenumber418de
dc.description.statuspeerReviewedde
dc.bibliographicCitation.journalForestsde


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