Search results for "types"
showing 10 items of 956 documents
Molecular characterization of cyclic and obligate parthenogens in the aphid Rhopalosiphum padi (L.)
1996
Holocyclic clones of the aphid Rhopalosiphum padi (L.) reproduce by cyclic parthenogenesis, whereas anholocyclic individuals are obligate parthenogens. Mitochondrial DNA (mtDNA) and random amplified polymorphic DNA markers in R . padi as well as plasmid DNA markers of its bacterial endosymbiont, Buchnera aphidicola , were examined to determine the extent of genetic divergence between clones with these differing breeding systems. These analyses revealed that cyclically parthenogenetic lineages possessed differing mtDNA and plasmid haplotypes than most obligately asexual clones. The extent of sequence divergence between these maternally inherited molecules suggests a relatively ancient origin…
Une classification unifiée des produits de protection des plantes
2018
CONTEXTE - La classificationdes PPP (produits de protectiondes plantes) par mode d’actionest un outil pour faciliter le suiviet la gestion de leurs ENI (effetsnon intentionnels) en particulierdes résistances de bioagresseurs à ces produits. Il existeactuellement plusieurs classifications, chacune concernantun seul type d’utilisation (herbicide, insecticide/acaricide,fongicide). Selon son usage,un même mode d’action, voireune même substance, est alorsrépertorié(e) dans des classifications différentes.PROPOSITION - Dans le butde faciliter le suivi et la gestiondes effets non intentionnelsdes PPP, cet article présenteune nouvelle classification deces produits :– unifiée, exhaustive, intégrée,«…
Températures extrêmes minimales de printemps et types de circulation atmosphérique sur l’Europe moyenne.
2019
55 pages; National audience
Variabilité climatique printanière et phénologie végétale en Auxois : exemple d'Alise-Sainte-Reine (Côte d'Or).
2018
Un suivi photographique est effectué depuis 2011 sur le site viticole d'Alise-Sainte-Reine, dans l'Auxois en Bourgogne du Nord (département de la Côte-d'Or), afin de mettre en évidence des indicateurs permettant d'expliquer la variabilité interannuelle des stades phénologiques de certaines espèces végétales par l'analyse de la variabilité climatique et de la fréquence, succession et durée des types de circulation atmosphérique et de temps. Les photos prises au début du mois de mai montrent une différence sensible entre d'une part les années 2011 et 2018, et d'autre part les années 2016 et 2017. Sur la vigne de la parcelle sélectionnée et les arbres environnants, le déploiement des feuilles …
PPHD: une plateforme pour le phenotypage a haut debit
2012
International audience; The methodologies for genotyping and high throughput automated platforms for the production of type-omics (genomics, transcriptomics, protected omics ...) have greatly increased over the last few years and are now available to analyze the expression of genes of plants in several environmental conditions. However, a break of conceptual and technical services, non-destructive characterization and dynamic phenotypes, at the organ or plarite, has hundreds of related genotypes (Broadband) remains the limiting factor for the discovery of new characters or new varieties. This systematic exploration of diversity. Genetics within a species or between species requires platform…
Phylogeographical footprints of the Strait of Gibraltar and Quaternary climatic fluctuations in the western Mediterranean: a case study with the grea…
2005
Correspondance: cosson@supagro.inra.fr; International audience; We used mitochondrial cyt b sequences to investigate the phylogenetic relationships of Crocidura russula (sensu lato) populations across the Strait of Gibraltar, western Europe, Maghreb, and the Mediterranean and Atlantic islands. This revealed very low genetic divergence between European and Moroccan populations. The application of a molecular clock previously calibrated for shrews suggested that the separation of European from Moroccan lineages occurred less than 60 000 bp, which is at least 5 million years (Myr) after the reopening of the Strait of Gibraltar. This means that an overwater dispersal event was responsible for t…
Plant gene responses to Glomus mosseae in compatible and incompatible genotypes of Medicago truncatula
2006
International audience
Assessment of Adult Mouse Brain Neuroanatomical Phenotypes Using Quantitative and Precision Histology
2022
Modelling human neurodevelopmental disorders is important in biomedical research since the brain cannot be easily accessed in humans. In this chapter, we describe a series of standardized procedures for the reliable analysis of neuroanatomical phenotypes (NAPs) of the adult mouse brain using quantitative 2D histological practices. Our goal is to provide the reader an experimental pipeline, ranging from experimental work through to data analysis, which can be performed in any academic research setting with or without access to a histology platform. Depending on the type of sections studied, parasagittal or coronal, the assessment of brain neuroanatomy is performed at stereotaxic sections, at…
New insights into the use of rhizobia to mitigate soil N2O emissions
2022
Agriculture is a major anthropogenic source of the greenhouse gas N2O, which is also involved in stratospheric ozone depletion. While the use of rhizobial inoculants has already been reported as an emerging option for mitigating soil N2O emissions, this study presents an in situ abatement of 70% of soil N2O emission using the strain nosZ+ G49 vs. nosZ− USDA138 in association with soybean. Therefore, we consider that the choice of the inoculant strain of a leguminous crop should take into account the capacity of strains to reduce nitrous oxide in addition to their N fixation capacity. This study also clearly suggests that this mitigation option could be considered not only for soybean but al…
Impact of the growth of different maize genotypes on arbuscular mycorrhizal fungi
2001
International audience