Identification of QTLs influencing wood property traits in loblolly pine (Pinus taeda L.). I. Physical wood properties

Sewell, Mitchell M.; Bassoni, Daniel L.; Megraw, Robert A.; Wheeler, Nicholas C.; Neale, David B.

doi:10.1007/s001220051607

Cited by 84 publications

(79 citation statements)

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“…Few markers controlling both earlywood and latewood specific gravity or growth were detected; their expression appeared different. In Pinus taeda, many loci appeared to be involved in the control of earlywood and latewood specific gravity, but few were also common [16]. In this latter study, most QTLs were detected for only a single ring; nevertheless some QTLs were more time-stable.…”

Section: Discussionmentioning

confidence: 53%

“…The phenotypic variation explained by the QTL varies greatly across traits and studies, even within wood components: it reaches about 45% for the modulus of elasticity [10], and it stays around 10% for wood density in Pinus taeda [16] or Eucalyptus grandis [7,19]. In the present study, the maximum phenotypic variability related to the marker is about 8%.…”

Section: Discussionmentioning

confidence: 57%

“…Different wood quality components can thus be analysed: wood density and ring width of each ring or ring part. Applying this method, accurate QTL detection for wood components becomes possible without tree destruction, as shown in several studies in Pinus taeda [11,16].…”

Section: Introductionmentioning

confidence: 97%

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Localisation of genomic regions controlling microdensitometric parameters of wood characteristics in hybrid larches

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Faivre-Rampant

Pâques³

et al. 2002

Ann. For. Sci.

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-The use of wood quality components in forest trees selection is hampered by long delays before phenotypic evaluation. Marker-assisted selection opens new possibilities since selection becomes feasible even before trait expression. In the present study, we have analysed 224 13-year-old hybrid larches derived from eight progenies from a single female parent in order to localise genomic regions controlling several wood traits. Traits were assessed on radial cores by microdensitometry, a method that provides estimates of wood density and radial growth and avoids tree destruction. Measurements were assessed individually on six consecutive rings. QTL detection was achieved by ANOVA using 68 AFLP markers distributed on average each 20 cM along larch genome. Significant QTLs for at least two out of six studied years are distributed on seven linkage groups. Applications towards marker-assisted selection are discussed. QTL / wood quality / microdensitometry / wood density / LarixRésumé -Localisation des régions du génome contrôlant des composantes microdensitométriques de la qualité du bois chez des mélèzes hybrides. Les paramètres de qualité du bois sont peu pris en compte dans l'amélioration des arbres forestiers en raison des délais d'évaluation très longs. La sélection assistée par marqueurs ouvre de nouvelles perspectives en rendant possible une sélection précoce pour des caractères à expression tardive. Dans ce travail, nous avons analysé huit descendances de mélèze hybride (Larix decidua × L. kaempferi) issues d'un même parent et comportant 224 arbres âgés de 13 ans, afin de localiser sur une carte génétique les régions du génome qui contrôlent divers paramètres de qualité du bois. Ces paramètres ont été mesurés sur des carottes de bois par microdensitométrie. Cette méthode permet d'évaluer, de façon non destructrice, de nombreuses composantes de la densité du bois et également de la croissance radiale. Les mesures sont effectuées sur six cernes consécutifs. La localisation des QTL a été menée à l'aide de 68 marqueurs AFLP distants en moyenne de 20 cM et par analyse de variance. Les QTL significatifs pour au moins deux des six années analysées se répartissent sur sept groupes de liaison. Les applications de ces résultats sont discutées essentiellement dans les perspectives de la sélection assistée par marqueurs. QTL / qualité du bois / microdensitométrie / densité du bois / Larix

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Section: Discussionmentioning

confidence: 53%

Section: Discussionmentioning

confidence: 57%

See 1 more Smart Citation

Localisation of genomic regions controlling microdensitometric parameters of wood characteristics in hybrid larches

Arcade

Faivre-Rampant

Pâques³

et al. 2002

Ann. For. Sci.

View full text Add to dashboard Cite

show abstract

“…However, tree growth (Bradshaw and Stettler 1995;Grattapaglia et al 1996Grattapaglia et al , 2009Plomion et al 1996;Verhaegen et al 1997;Wu 1998;Kaya et al 1999) and wood properties Sewell et al 2000Sewell et al , 2002Ukrainetz et al 2007) have been successfully studied using QTL mapping approaches. A great many quantitative traits in trees appear to be oligogenic with substantial proportions of the phenotypic variance attributable to a few genetic loci (Table 2).…”

Section: Which Tree Genomes Are Being Studied?mentioning

confidence: 99%

“…In an E. grandis study , QTLs for wood-specific gravity were identified, and in loblolly pine, QTLs were identified for MFA and wood-specific gravity (Sewell et al 2000). QTLs for chemical properties of wood have been described in Eucalyptus (Kirst et al 2004a) and in conifers (Sewell et al 2002;Ukrainetz et al 2007).…”

Section: Which Tree Genomes Are Being Studied?mentioning

confidence: 99%