Genetic dissection of vegetative propagation traits in Eucalyptus tereticornis and E. globulus

Marques, Cristina; Vasquez-Kool, J.; Carocha, Víctor; Ferreira, J. G.; O’Malley, David M.; Liu, B.-H.; Sederoff, Ronald R.

doi:10.1007/s001220051400

Cited by 77 publications

(66 citation statements)

References 41 publications

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“…The discrepancy between the detection of stable QTLs across years on the one hand, and the weak inter-annual phenotypic correlation on the other hand, could be explained by the cumulated effect of yearspecific QTLs displaying a too small phenotypic effect to be detected in the oak progeny. Stable QTLs across years have been already found in Eucalyptus by Marques et al [24]. These authors identified 9 QTLs explaining between 2.79 and 8.11% of the phenotypic variance of rooting ability, with 5 being detected in two consecutive years and 4 being specific to only one year.…”

Section: Qtl Detectionmentioning

confidence: 67%

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Quantitative trait loci mapping for vegetative propagation in pedunculate oak

et al. 2005

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-Vegetative propagation is one of the main methods used for the deployment of improved genetic forest tree species. The objective of this paper was to study the genetic architecture of vegetative propagation by detecting Quantitative Trait Loci (QTL) in pedunculate oak (Quercus robur). The mapping population consisted on an F 1 family of 278 offspring. Assessment of rooting ability over three years permitted the detection of 10 QTLs explaining between 4.4 and 13.8% of phenotypic variance, of which the two strongest were stable across years. Ongoing genomics programs in trees and in Arabidopsis are starting to shed light on the nature of the underlying genes. vegetative propagation / QTL / Quercus roburRésumé -Détection de locus à effet quantitatif qui contrôlent l'aptitude au bouturage chez le chêne pédonculé. La multiplication végétative est une des principales méthodes utilisée pour l'exploitation du matériel forestier amélioré. L'objectif de cet article était d'étudier l'architecture génétique de la propagation végétative en détectant des QTL chez le chêne pédonculé (Quercus robur). La population de cartographie consistait en une famille F 1 de 278 descendants. La mesure de l'aptitude à l'enracinement durant quatre années a permis de détecter 10 QTL expliquant entre 4,4 et 13,8 % de la variance phénotypique, les deux plus forts étant stables à travers les années. L'avancée des programmes de génomique chez les arbres et chez Arabidopsis permettra de déterminer la nature des gènes sous-jacents. multiplication végétative / QTL / Quercus robur

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Section: Qtl Detectionmentioning

confidence: 67%

“…In addition to a strong genetic control of adventitious rooting ability, QTLs were found to be stable across environments. Out of the 9 QTLs detected in Eucalyptus by Marques et al [24], five were found to be stable over two consecutive years.…”

Section: Introductionmentioning

confidence: 84%

Quantitative trait loci mapping for vegetative propagation in pedunculate oak

et al. 2005

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“…Variações no percentual de enraizamento in vitro (entre 49 e 81 %) foram observadas entre e dentro de famílias de polinização aberta de Eucalyptus grandis (SOBROSA;CORDER, 2003). Locos de características quantitativas (QTLs) que controlam o processo de enraizamento adventício em várias espécies de Eucalyptus já foram detectados (MARQUES et al, 1999;MARQUES et al, 2002), indicando que as variações fenotípicas nesta característica possuem um significativo componente genotípico.…”

Section: Figure 3 -Rooting (Ecs -A) and Number Of Roots Per Mini-cuttunclassified

Enraizamento de miniestacas de clones híbridos de Eucalyptus globulus

et al. 2011

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RESUMO -Este estudo teve como objetivo avaliar o efeito do regulador de crescimento ácido indolbutírico (AIB) no enraizamento de miniestacas apicais e intermediárias de clones de Eucalyptus urophylla x E. globulus e Eucalyptus grandis x E. globulus. O enraizamento das miniestacas foi conduzido durante 30 dias em casa de vegetação climatizada e, em seguida, as mudas foram transferidas para casa de sombra, permanecendo por 10 dias. O delineamento experimental utilizado foi em blocos ao acaso, em arranjo fatorial triplo, constituído de dois tipos de miniestacas (apicais e intermediárias), três concentrações de AIB (0, 2000 e 4000 mg L -1 ) e 11 clones, em três repetições, compostas de parcelas com 12 miniestacas por repetição. Não houve efeito do AIB sobre as características avaliadas. A sobrevivência e o enraizamento das miniestacas apicais foram significativamente superiores. Houve diferença significativa entre clones quanto às características avaliadas, exceto a sobrevivência após 30 dias na casa de vegetação.Palavras-chave: Propagação clonal, Miniestaquia e Ácido indolbutírico. ROOTING OF MINI-CUTTINGS OF Eucalyptus globulus HYBRID CLONES ABSTRACT -The objective of this study was to evaluate the effect of the growth regulator indol butiric acid (IBA) on the rooting of apical and intermediate mini-cuttings of Eucalyptus urophylla x E. globulus and

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“…It is, therefore, necessary to test the QTLs identified in this study in different environments with different spore mixtures. An assessment of the diversity of QTL alleles and their action present in a broad genetic population should also be made (Marques et al, 1999;King et al, 2000;Miflin, 2000).…”

Section: Potential Applicationsmentioning

confidence: 99%

Four QTLs determine crown rust (Puccinia coronata f. sp. lolii) resistance in a perennial ryegrass (Lolium perenne) population

Muylle¹,

Baert²,

Bockstaele

et al. 2005

Heredity

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Crown rust resistance is an important selection criterion in ryegrass breeding. The disease, caused by the biotrophic fungus Puccinia coronata, causes yield losses and reduced quality. In this study, we used linkage mapping and QTL analysis to unravel the genomic organization of crown rust resistance in a Lolium perenne population. The progeny of a pair cross between a susceptible and a resistant plant were analysed for crown rust resistance. A linkage map, consisting of 227 loci (AFLP, SSR, RFLP and STS) and spanning 744 cM, was generated using the two-way pseudo-testcross approach from 252 individuals. QTL analysis revealed four genomic regions involved in crown rust resistance. Two QTLs were located on LG1 (LpPc4 and LpPc2) and two on LG2 (LpPc3 and LpPc1). They explain 12.5, 24.9, 5.5 and 2.6% of phenotypic variance, respectively. An STS marker, showing homology to R genes, maps in the proximity of LpPc2. Further research is, however, necessary to check the presence of functional R genes in this region. Synteny at the QTL level between homologous groups of chromosomes within the Gramineae was observed.LG1 and LG2 show homology with group A and B chromosomes of oat on which crown rust-resistance genes have been identified, and with the group 1 chromosomes of the Triticeae, on which leaf rustresistance genes have been mapped. These results are of major importance for understanding the molecular background of crown rust resistance in ryegrasses. The identified markers linked to crown rust resistance have the potential for use in marker-assisted breeding. Heredity (2005) 95, 348-357.

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Genetic dissection of vegetative propagation traits in Eucalyptus tereticornis and E. globulus

Cited by 77 publications

References 41 publications

Quantitative trait loci mapping for vegetative propagation in pedunculate oak

Quantitative trait loci mapping for vegetative propagation in pedunculate oak

Enraizamento de miniestacas de clones híbridos de Eucalyptus globulus

Four QTLs determine crown rust (Puccinia coronata f. sp. lolii) resistance in a perennial ryegrass (Lolium perenne) population

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