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Registros recuperados: 9
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Comparison of tree architecture using tree edit distances: application to 2-year-old apple hybrids Inra
Segura, V.; Ouangraoua, A.; Ferraro, P.; Costes, E..
In fruit trees, understanding genetic determinisms of architectural traits is considered as a promising manner to control vegetative development and yield regularity. In this context, our study aimed to classify 2-year-old apple hybrids on the basis of their architectural traits. From a fine phenotyping, trees were described as tree graphs, including topological and geometric information. To evaluate the similarity between trees, comparison methods based on edit operations (substitution, insertion and deletion) were carried out. Distance between two tree graphs was computed by minimising the sum of the costs of the edit operations applied to transform one tree into another. Two algorithms for the comparison of unordered and partially ordered tree graphs...
Tipo: Journal Article Palavras-chave: RAMIFICATION; GRAPHE BRANCHING; CLUSTERING; GEOMETRY; TOPOLOGY.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008c64fe543&uri=/notices/prodinra1/2008/10/
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Dissecting apple tree architecture into genetic, ontogenetic and environmental effects : mixed linear modelling of repeated spatial and temporal measures Inra
Segura, V.; Cilas; Costes, E..
• The present study aimed to dissect tree architectural plasticity into genetic, ontogenetic and environmental effects over the first 4 yr of growth of an apple (Malus . domestica) F1 progeny by means of mixed linear modelling of repeated data. • Traits related to both growth and branching processes were annually assessed on different axes of the trees planted in a staggered-start design. Both spatial repetitions, (i.e. different axis types) and temporal repetitions (i.e. successive ages of trees) wereconsidered in a mixed linear model of repeated data.• A significant genotype effect was found for most studied traits and interactions between genotype and year and/or age were also detected. The analysis of repeated temporal measures highlighted that the...
Tipo: Journal Article Palavras-chave: INTERACTION GENOTYPE ENVIRONNEMENT; RAMIFICATION; PLASTICITE PHENOTYPIQUE; DESCENDANCE GENETIQUE; CARACTERE MORPHOLOGIQUE AUTOCORRELATION; BRANCHING; PHENOTYPIC PLASTICITY; PRIMARY GROWTH; SECONDARY GROWTH.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008737e75a2&uri=/notices/prodinra1/2008/10/
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Dissecting apple tree architecture into genetic, ontogenetic and environmental effects : QTL mapping Inra
Segura, V.; Durel, C.E.; Costes, E..
The present study aimed to dissect tree architectural plasticity into genetic, ontogenetic and environmental effects over the first 4 years of growth of an apple F1 progeny by means of quantitative traits loci (QTL) mapping. Both growth and branching processes were phenotyped on the consecutive annual shoots of different axes within a tree. For each studied trait, predicted values (best linear unbiased predictors, BLUPs) of the genotypic (G) effect or its interaction with tree age (G×A) and climatic year (G×Y) were extracted from mixed linear models of repeated data. These BLUPs, which are independent from autocorrelations between repeated measurements, were used for QTL mapping. QTL detection power was improved by this two-step approach. For each...
Tipo: Journal Article Palavras-chave: RAMIFICATION; MARQUEUR GENETIQUE; DESCENDANCE GROWTH; BRANCHING REPEATED DATA; MIXED LINEAR MODEL.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009b8bb818e&uri=/notices/prodinra1/2010/03/
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Estructura de la comunidad del fitoplancton en el área de El Rincón, Mar Argentino (febrero 2011) OceanDocs
Negri, R.M.; Silva, R.I.; Segura, V.; Cucchi Colleoni, A.D..
The El Rincón area in the Argentine continental shelf (coastal sector between 39º S-41º S) is known as one of the main breeding areas of the Argentine anchovy (Engraulis anchoita) Northern stock. However, there is scarce information regarding the structure of the primary producers, base of the pelagic food webs. The aim of this study was to identify the different phytoplanktonic communities in a coastal section in the area (depth lower than 60 m) during February 2011. Mean surface chlorophyll a concentration was 0.72 mg m-3, with the highest value in the innermost station (E34: 1.84 mg m-3) and the lowest in the mid section (E31: 0.24 mg m-3). In depth, similar concentrations were registered, except for the deepest station where the maximum value was...
Tipo: Journal Contribution Palavras-chave: Phytoplankton; Nannoplankton; Community composition; Size; Chlorophylls.
Ano: 2013 URL: http://hdl.handle.net/1834/5491
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Exploring the genetic determinisms of architectural and functional traits in an apple progeny Inra
Segura, V.; Regnard, J.L.; Durel, C.E.; Costes, E..
Traits related to tree architecture and tolerance to abiotic stress represent innovative targets for the selection of new cultivars in the contexts of integrated fruit production (IFP) and global climatic changes. Controlling tree form and leaf functioning is thus a desirable breeding objective, but efforts have been hampered by a poor knowledge of their determinisms in apple. In the last four years, the genetic basis of architectural and ecophysiological traits was investigated in a F1 apple progeny (‘Starkrimson’ × ‘Granny Smith’ cross) of 123 genotypes. A fine phenotyping was performed over the first 3 years of growth in the open field, collecting both topological and geometrical traits along the scaffold axes and at the whole tree level. After...
Tipo: Conference Paper Palavras-chave: PRODUCTION FRUITIERE INTEGREE; PFI; HERITABILITE; DETERMINISME GENETIQUE; DESCENDANCE ABIOTIC STRESS; FRUIT BREEDING; GLOBAL CHANGES; INTEGRATED FRUIT PRODUCTION; IFP; SUSTAINABLE FRUIT GROWING; TREE TRAINING.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200946fba75f&uri=/notices/prodinra1/2010/03/
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LAMINA: a tool for rapid quantification of leaf size and shape parameters Inra
Bylesjö, M.; Segura, V.; Soolanayakanahally, R. Y.; Rae, A. M.; Trygg, J.; Gustafsson, P.; Jansson, S.; Street, N. R..
Background :An increased understanding of leaf area development is important in a number of fields: in food and non-food crops, for example short rotation forestry as a biofuels feedstock, leaf area is intricately linked to biomass productivity; in paleontology leaf shape characteristics are used to reconstruct paleoclimate history. Such fields require measurement of large collections of leaves, with resulting conclusions being highly influenced by the accuracy of the phenotypic measurement process.Results :We have developed LAMINA (Leaf shApe deterMINAtion), a new tool for the automated analysis of images of leaves. LAMINA has been designed to provide classical indicators of leaf shape (blade dimensions) and size (area), which are typically required for...
Tipo: Journal Article Palavras-chave: TAILLE DE LA FEUILLE; FORME DE LA FEUILLE; MORPHOLOGIE VEGETALE LEAF AREA; LEAF SIZE; LEAF SHAPE; BIOMASS; IMAGE ANALYSIS; PLANT MORPHOLOGY.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20104741eb72&uri=/notices/prodinra1/2011/07/
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Plant architecture comparison methods : a review of existing algorithms and examples of application Inra
Ouandraoua, A.; Segura, V.; Costes, E.; Ferraro, P..
Among a number of generic tools that have been developed in the last decade to measure, explore,analyze, model and visualize plant architecture in 3-dimensions, this paper focuses on methodsdedicated to the comparison between plant architectures. After a first step that has been reachedwith the comparison of branching sequences along axes, Ferraro and Godinhave extended comparison methods to the whole branching systems. Their method wasapplied to the comparison of plants formalized as tree-graphs. In thelast two years, new algorithms were explored and implemented in order to compare plantarchitectures with different relationships between components of the plant structure taken intoaccount in the corresponding formal representations. The present paper...
Tipo: Conference Paper Palavras-chave: PLANT COMPARISON; EDIT DISTANCES; LOCAL SIMILARITIES.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008da24bf64&uri=/notices/prodinra1/2008/10/
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QTL analysis for leaf gas exchange in an apple progeny grown under atmospheric constraints Inra
Regnard, J.L.; Segura, V.; Merveille, N.; Durel, C.E.; Costes, E..
The capacity of the apple tree to tolerate temporary abiotic constraints was investigated through leaf responses to different vapor pressure deficits (VPD). A ‘Starkrimson’ x ‘Granny Smith’ F1 progeny of 125 full-sibs whip-grafted onto Pajam® 2 rootstocks and pot-cultivated was studied (three replicates). After two months, plants were transferred into a controlled environment chamber ensuring five increasing VPDs, from 0.7 to 2.7 kPa, other conditions remaining constant. Leaf stomatal conductance (gsw), net CO2 assimilation (An) and transpiration (E) rates were measured, and water use efficiency (WUE, An/E) computed. The leaf responses were analyzed through a linear model including genotype as random effect for each VPD level separately. Whatever the VPD,...
Tipo: Conference Paper Palavras-chave: HERITABILITE; PLASTICITE; CONDUCTANCE STOMATIQUE; STOMATE ABIOTIC STRESS; HERITABILITY; MALUS X DOMESTICA; PLASTICITY; QUANTITATIVE TRAIT LOCI; PHOTOSYNTHESIS; STOMATA; TRANSPIRATION; WATER USE EFFICIENCY.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20091f202fdc&uri=/notices/prodinra1/2010/03/
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Towards a strategy for phenotyping architectural traits in mature F1 hybrids of an apple progeny Inra
Segura, V.; Kelner, J.J.; Lauri, P.E.; Costes, E..
Over the last decade several genetic studies investigated the genetic determinisms of architectural traits. However, most of these works were carried out in juvenile progenies, and the genetic determinisms of adult tree architecture remained poorly understood. Within this context, the present study is aimed at defining a phenotyping strategy at the beginning of mature stage that should provide both quantitative traits and qualitative criteria for genetic studies and selection schemes respectively. Accurate measurements and visual observations were performed on four-year-old apple hybrids focusing on the main architectural processes: primary and secondary growth, branching and form. Among the set of quantitative traits and qualitative criteria analyzed, a...
Tipo: Conference Paper Palavras-chave: HERITABILITE; DESCENDANCE; RAMIFICATION; FORME BROAD SENSE HERITABILITY; PRIMARY GROWTH; SECONDARY GROWTH; BRANCHING; FORM; EXPERT NOTATION.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009b0a230a3&uri=/notices/prodinra1/2010/03/
Registros recuperados: 9
Primeira ... 1 ... Última
 

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