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Registros recuperados: 6
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Characterization of two major genetic factors controlling quantitative resistance to Melampsora larici-populina leaf rust in hybrid poplars : strain specificity, field expression, combined effects, and relationship with a defeated qualitative resistance gene Inra
Dowkiw, A.; Bastien, C..
Two genetic factors explain a significant proportion of the variability for quantitative resistance to Melampsora larici-populina leaf rust in a Populus deltoides × P. trichocarpa F1 progeny. One is inherited from P. deltoides and is associated with a defeated qualitative resistance geneR1, and the other, RUS, is inherited from P. trichocarpa. To assess the potential contribution of these two factors for durable resistance breeding, 284 genotypes from this F1 progeny were studied in laboratory experiments with three M. larici-populina strains and in a field experiment under natural inoculum pressure. Results confirmed that both factors can have strong beneficial effects in the laboratory. These effects were strain specific, thus impairing their chances for...
Tipo: Journal Article Palavras-chave: PEUPLIER HYBRIDE; RESISTANCE QUANTITATIVE; FACTEUR GENETIQUE; EFFET RESIDUEL; PEUPLIER HYBRIDE; EXPERIMENTATION EN LABORATOIRE POPULUS DELTOIDE; POPULUS TRICHOCARPA; MELAMPSORA LARICI-POPULINA.
Ano: 2004 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007c4d0fb6b&uri=/notices/prodinra1/2007/04/
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Effects of environment and progeny on biomass estimations of five hybrid poplar families grown at three contrasting sites across Europe Inra
Dillen, S.Y.; Marron, N.; Bastien, C.; Ricciotti, L.; Salani, F.; Sabatti, M.; Pinel, M.P.C.; Pinel, A.M.; Taylor, G.; Ceulemans, R..
The quantitative and qualitative estimation of aboveground previous termbiomassnext term production is essential for short-rotation forestry. Indirect methods of previous termbiomassnext term estimation have been developed based on the establishment of regressions between previous termbiomassnext term components and tree dimensions as well as canopy architecture. The difficulty encountered with this method is to know whether, and to what degree, the obtained equations can be used under contrasting environmental conditions and for different genetic backgrounds. In the present study, allometric equations were developed linking tree dry weight (stem, branch and aboveground tree dry weight) with stem circumference, stem height and number of sylleptic branches...
Tipo: Journal Article Palavras-chave: PEUPLIER HYBRIDE; TAILLIS A COURTE ROTATION; CONDITION ENVIRONNEMENTALE; FACTEUR DU MILIEU; EFFET GENETIQUE; EQUATION ALLOMETRIQUE; MATIERE SECHE HYBRID POPLAR; SHORT ROTATION COPPICE; ENVIRONMENTAL CONDITION; GENETIC BACKGROUND; ALLOMETRIC EQUATION; DRY WEIGHT; BIOMASS.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20078f3694e5&uri=/notices/prodinra1/2008/10/
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Genetic architecture of qualitative and quantitative Melampsora larici-populina leaf rust resistance in hybrid poplar: genetic mapping and QTL detection Inra
Jorge, V.; Dowkiw, A.; Faivre-Rampant, P.; Bastien, C..
• In order to elucidate the genetic control of resistance to Melampsora larici-populina leaf rust in hybrid poplars, a Populus deltoides × P. trichocarpa F1 progeny was analysed for qualitative and quantitative rust resistances.• This progeny was evaluated for three components of quantitative resistance (latent period, uredinia number and uredinia size) to seven M. larici-populina strains in controlled conditions, and for one component of field susceptibility (rust colonization on the most infected leaf).• One qualitative resistance locus inherited from P. deltoides, R1, was localized on the genetic map. It segregates 1 : 1 in the F1 progeny and is effective against four of the studied strains. QTL analysis was performed separately on R1 and r1 genotype...
Tipo: Journal Article Palavras-chave: PEUPLIER HYBRIDE; CARTE GENETIQUE; ARCHITECTURE GENETIQUE; DETECTION DE QTL MELAMPSORA LARICI-POPULINA.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007fc50b4e1&uri=/notices/prodinra1/2007/04/
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Histological aspects of a hypersensitive response in Poplar to Melampsora larici-populina Inra
Laurans, F.; Pilate, G..
The course of the infection and development of the biotrophic fungus Melampsora larici-populina on leaf tissue from the hybrid poplar Populus deltoides × P. nigra ‘Ogy’ was monitored at the histological level. Leaf disks were inoculated with one of two rust physiological races (E1 and E2), resulting in interactions that were either incompatible (race E1) or compatible (race E2). In the compatible interaction, the fungus rapidly colonized the leaf without inducing any apparent host response. Symptoms appeared on the leaf several days after inoculation just prior to spore dissemination. The incompatible interaction was characterized by the early collapse and disorganization of cytoplasm of infected cells 17 h after inoculation and within 2 h after the...
Tipo: Journal Article Palavras-chave: PEUPLIER HYBRIDE; RESISTANCE A LA ROUILLE; REPONSE HYPERSENSIBLE; RACE PHYSIOLOGIQUE; ANALYSE HISTOLOGIQUE HYBRID POPLAR; RUST RESISTANCE; HYPERSENSITIVE RESPONSE; PHYSIOLOGICAL RACE; HISTOLOGICAL ANALYSIS.
Ano: 1999 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20109a00378b&uri=/notices/prodinra1/2011/02/
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Impact of drought on productivity and water use efficiency in 29 genotypes of Populus deltoides x Populus nigra Inra
Monclus, R.; Dreyer, E.; Villar, M.; Delmotte, F.; Delay, D.; Petit, J.M.; Barbaroux, C.; Le Thiec, D.; Brechet, C.; Brignolas, F..
• We examined the relationships among roductivity, water use efficiency (WUE) and drought tolerance in 29 genotypes of Populus× euramericana (Populus deltoides × Populus nigra), and investigated whether some leaf traits could be used as predictors for productivity, WUE and drought tolerance.• At Orléans, France, drought was induced on one field plot by withholding water, while a second plot remained irrigated and was used as a control. Recorded variables included stem traits (e.g. biomass) and leaf structural (e.g. leaf area) and functionaltraits [e.g. intrinsic water use efficiency (Wi) and carbon isotope discrimination (∆)].• Productivity and ∆ displayed large genotypic variability and were not correlated. ∆ scaled negatively with Wi and positively with...
Tipo: Journal Article Palavras-chave: DISCRIMINATION ISOTOPIQUE DU CARBONE; RESISTANCE A LA SECHERESSE; CARACTERISTIQUE DE LA FEUILLE; RELATION PLANTE EAU; PEUPLIER HYBRIDE; DIVERSITE GENOTYPIQUE WATER USE EFFICIENCY.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007ed46096&uri=/notices/prodinra1/2007/04/
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The CP4 transgene provides high levels of tolerance to Roundup® herbicide in field-grown hybrid poplars Inra
Meilan, R.; Han, K.H.; Ma, C.; DiFazio, S. P.; Eaton, J. A.; Hoien, E. A.; Stanton, B. J; Crockett, R. P.; Taylor, M. L.; James, R. R.; Skinner, J. S.; Jouanin, L.; Pilate, G.; Strauss, S. H..
Les auteurs ont étudié l’effet combiné de deux gènes chez des peupliers hybrides (genre Populus), CP4 et GOX, qui confèrent la tolérance au glyphosate (l’ingrédient actif de l’herbicide Roundup©). À l’aide de la transformation par Agrobacterium, 80 lignées transgéniques indépendantes (i.e., les produits du transfert génétique asexué) ont été produites à partir d’une variété de clones de peupliers hybrides (40 lignées de Populus trichocarpa Torr. & Gray × Populus deltoides, 35 lignées de Populus tremula L. × Populus alba L. et cinq lignées de P. tremula × Populus tremuloides Michx). La tolérance au glyphosate a été évaluée pendant 2 ans dans des dispositifs au champ établis dans l’est et l’ouest de l’Oregon. Dix pour cent des lignées transgéniques n’ont...
Tipo: Journal Article Palavras-chave: PLANTE TRANSGENIQUE; PEUPLIER HYBRIDE; GLYPHOSATE TRANSGENIC PLANT; HYBRID POPLAR; GLYPHOSATE.
Ano: 2002 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007660e25ef&uri=/notices/prodinra1/2008/12/
Registros recuperados: 6
Primeira ... 1 ... Última
 

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