The potential of aspen clonal forestry in Alberta: breeding regions and estimates of genetic gain from selection.
Identifieur interne : 002882 ( Main/Exploration ); précédent : 002881; suivant : 002883The potential of aspen clonal forestry in Alberta: breeding regions and estimates of genetic gain from selection.
Auteurs : Tim Gylander [Canada] ; Andreas Hamann ; Jean S. Brouard ; Barb R. ThomasSource :
- PloS one [ 1932-6203 ] ; 2012.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Populus.
- génétique : Populus.
- Alberta, Analyse de régression, Phylogenèse, Phénotype, Science forêt, Sélection, Sélection génétique, Variation génétique.
English descriptors
- KwdEn :
- MESH :
- geographic : Alberta.
- genetics : Populus.
- growth & development : Populus.
- Breeding, Forestry, Genetic Variation, Phenotype, Phylogeny, Regression Analysis, Selection, Genetic.
Abstract
BACKGROUND
Aspen naturally grows in large, single-species, even-aged stands that regenerate clonally after fire disturbance. This offers an opportunity for an intensive clonal forestry system that closely emulates the natural life history of the species. In this paper, we assess the potential of genetic tree improvement and clonal deployment to enhance the productivity of aspen forests in Alberta. We further investigate geographic patterns of genetic variation in aspen and infer forest management strategies under uncertain future climates.
METHODOLOGY/PRINCIPAL FINDINGS
Genetic variation among 242 clones from Alberta was evaluated in 13 common garden trials after 5-8 growing seasons in the field. Broad-sense heritabilities for height and diameter at breast height (DBH) ranged from 0.36 to 0.64, allowing 5-15% genetic gains in height and 9-34% genetic gains in DBH. Geographic partitioning of genetic variance revealed predominant latitudinal genetic differentiation. We further observed that northward movement of clones almost always resulted in increased growth relative to local planting material, while southward movement had a strong opposite effect.
CONCLUSION/SIGNIFICANCE
Aspen forests are an important natural resource in western Canada that is used for pulp and oriented strandboard production, accounting for ~40% of the total forest harvest. Moderate to high broad-sense heritabilities in growth traits suggest good potential for a genetic tree improvement program with aspen. Significant productivity gains appear possible through clonal selection from existing trials. We propose two breeding regions for Alberta, and suggest that well-tested southern clones may be used in the northern breeding region, accounting for a general warming trend observed over the last several decades in Alberta.
DOI: 10.1371/journal.pone.0044303
PubMed: 22957006
PubMed Central: PMC3431317
Affiliations:
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This offers an opportunity for an intensive clonal forestry system that closely emulates the natural life history of the species. In this paper, we assess the potential of genetic tree improvement and clonal deployment to enhance the productivity of aspen forests in Alberta. We further investigate geographic patterns of genetic variation in aspen and infer forest management strategies under uncertain future climates.</p></div><div type="abstract" xml:lang="en"><p><b>METHODOLOGY/PRINCIPAL FINDINGS</b></p><p>Genetic variation among 242 clones from Alberta was evaluated in 13 common garden trials after 5-8 growing seasons in the field. Broad-sense heritabilities for height and diameter at breast height (DBH) ranged from 0.36 to 0.64, allowing 5-15% genetic gains in height and 9-34% genetic gains in DBH. Geographic partitioning of genetic variance revealed predominant latitudinal genetic differentiation. We further observed that northward movement of clones almost always resulted in increased growth relative to local planting material, while southward movement had a strong opposite effect.</p></div><div type="abstract" xml:lang="en"><p><b>CONCLUSION/SIGNIFICANCE</b></p><p>Aspen forests are an important natural resource in western Canada that is used for pulp and oriented strandboard production, accounting for ~40% of the total forest harvest. Moderate to high broad-sense heritabilities in growth traits suggest good potential for a genetic tree improvement program with aspen. Significant productivity gains appear possible through clonal selection from existing trials. We propose two breeding regions for Alberta, and suggest that well-tested southern clones may be used in the northern breeding region, accounting for a general warming trend observed over the last several decades in Alberta.</p></div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">22957006</PMID><DateCompleted><Year>2013</Year><Month>01</Month><Day>21</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1932-6203</ISSN><JournalIssue CitedMedium="Internet"><Volume>7</Volume><Issue>8</Issue><PubDate><Year>2012</Year></PubDate></JournalIssue><Title>PloS one</Title><ISOAbbreviation>PLoS One</ISOAbbreviation></Journal><ArticleTitle>The potential of aspen clonal forestry in Alberta: breeding regions and estimates of genetic gain from selection.</ArticleTitle><Pagination><MedlinePgn>e44303</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1371/journal.pone.0044303</ELocationID><Abstract><AbstractText Label="BACKGROUND" NlmCategory="BACKGROUND">Aspen naturally grows in large, single-species, even-aged stands that regenerate clonally after fire disturbance. 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Brouard</name><name sortKey="Hamann, Andreas" sort="Hamann, Andreas" uniqKey="Hamann A" first="Andreas" last="Hamann">Andreas Hamann</name><name sortKey="Thomas, Barb R" sort="Thomas, Barb R" uniqKey="Thomas B" first="Barb R" last="Thomas">Barb R. Thomas</name></noCountry><country name="Canada"><noRegion><name sortKey="Gylander, Tim" sort="Gylander, Tim" uniqKey="Gylander T" first="Tim" last="Gylander">Tim Gylander</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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