Xavier Draye

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Recent years have seen an increase in methods for plant phenotyping using image analyses. These methods require new software solutions for data extraction and treatment. These solutions are instrumental in supporting various research pipelines, ranging from the localisation of cellular compounds to the quantification of tree canopies. However, due to the(More)
Breeding for resistance to Fe toxicity in rice remains challenging because of the complex nature of this trait. In the past 15 years, several QTL studies have been conducted using different combinations of crosses and environments. The aim of this study was to compile these data in a unique QTL map to identify candidate regions (CR) and, subsequently,(More)
The role of arbuscular mycorrhizal fungi (AMF) in the control of migratory endoparasitic nematodes is nowadays largely admitted. Most studies were conducted under greenhouse conditions and a few used in vitro cultures with transgenic root organs. Here, we reported, for the first time, on the interaction between an AMF, Rhizophagus irregularis MUCL 41833 and(More)
This paper presents an original spit-and-combine imaging procedure that enables the complete vectorization of complex root systems grown in rhizotrons. The general principle of the method is to (1) separate the root system into a small number of large pieces to reduce root overlap, (2) scan these pieces one by one, (3) analyze separate images with a root(More)
Genetic and genomic approaches in model organisms have advanced our understanding of root biology over the last decade. Recently, however, systems biology and modeling have emerged as important approaches, as our understanding of root regulatory pathways has become more complex and interpreting pathway outputs has become less intuitive. To relate root(More)
Life history traits--hatchability, longevity, and egg production--of five wild-caught populations of Drosophila melanogaster were measured after these populations had been reared in constant laboratory conditions during a 4-year period. The results were analyzed together with those that had been obtained with the same populations just after capture. They(More)
The present study used 15 simple sequence repeat loci to characterize the genetic diversity of the germplasm that originated the current industrial chicory and to establish the relationships between and inside Cichorium intybus L. and Cichorium endivia L. Initially we analyzed 19 cultivated C. endivia accessions, 27 wild and 155 cultivated C. intybus(More)
Iron (Fe) toxicity is a major constraint in lowland rice. Because of its higher rusticity and adaptability to adverse soil conditions, the African rice Oryza glaberrima constitutes a new potential source of genes for rice improvement. This study aimed at mapping quantitative trait loci (QTLs) for resistance to Fe toxicity. A set of 220 BC3DH lines derived(More)
Nucleotidic polymorphisms were identified in fructan exohydrolases genes which are statistically associated with enhanced susceptibility to post-harvest inulin depolymerization. Industrial chicory (Cichorium intybus L.) root is the main commercial source of inulin, a linear fructose polymer used as dietary fiber. Post-harvest, inulin is depolymerized into(More)
Near infrared microscopy (NIRM) has been developed as a rapid technique to predict the chemical composition of foods, reduce analytical costs and time and ease sample preparation. In this study, NIRM has been evaluated as an alternative to classical chemical analysis to determine the nitrogen and carbon content of small samples of tomato (Solanum(More)