Search results for "Génétique"
showing 10 items of 132 documents
Genetic evidence confirms polygamous mating system in a crustacean parasite with multiple hosts.
2014
Mating systems are diverse in animals, notably in crustaceans, but can be inferred from a limited set of parameters. Baeza and Thiel (2007) proposed a model predicting mating systems of symbiotic crustaceans with three host characteristics and the risk of predation. These authors proposed five mating systems, ranging from monogamy to polygynandry (where multiple mating occurs for both genders). Using microsatellite loci, we tested the putatively mating system of the ectoparasite crab Dissodactylus primitivus. We determined the mating frequencies of males and females, parentage assignment (COLONY & GERUD software) as well as the contents of female spermathecae. Our results are globally consi…
Génétique du modèle architectural : Passage de Milan de Butor
2018
« Le plus important pour moi, c'était de construire un espace », c'est par ces mots que Butor définit Passage de Milan, son premier roman publié en 1954 par les éditions de Minuit. Dans ce roman, l'immeuble parisien qui constitue le lieu unique de l'action répond à une double fonction car il est un modèle réduit de la réalité et, en même temps, le modèle autoréférentiel de la structure du texte. Ainsi, si sur le plan symbolique il est le modèle architectural d'une société dominée par les objets quotidiens, sur le plan du récit il devient « espace » d'expérimentation d'une nouvelle poétique. C'est par l'analyse du premier manuscrit (Fond Jean Grenier- Bnf) caractérisé par une narration linéa…
Molecular cloning, gene structure and expression profile of two mouse peroxisomal 3-ketoacyl-CoA thiolase genes
2004
Abstract Background In rats, two peroxisomal 3-ketoacyl-CoA thiolase genes (A and B) have been cloned, whereas only one thiolase gene is found in humans. The aim of this study was thus to clone the different mouse thiolase genes in order to study both their tissue expression and their associated enzymatic activity. Results In this study, we cloned and characterized two mouse peroxisomal 3-ketoacyl-CoA thiolase genes (termed thiolase A and B). Both thiolase A and B genes contain 12 exons and 11 introns. Using RNA extracted from mouse liver, we cloned the two corresponding cDNAs. Thiolase A and B cDNAs possess an open reading frame of 1272 nucleotides encoding a protein of 424 amino acids. In…
Première occurrence de la sous-espèce de rouget Mullus barbatus ponticus au Sud de la Méditerranée (golfe de Gabès, Tunisie) : arguments génétiques e…
2012
Research of genetic and molecular determinants involved in the nodulated root system architecture of legumes and contributing to improved nitrogen nu…
2016
Grain legume pulse crops are of great interest to allow a production of seeds high nutritional value without any contribution of nitrate fertilizer. The nitrogen nutrition of legumes depends indeed mainly on the fixation in nodules of atmospheric dinitrogen through the plant-rhizobium symbiosis, and to a lesser extent, absorption by roots of soil mineral nitrogen.A better understanding has been obtained on the genetic control of the development of roots and nodules and on their impact on nitrogen nutrition. High genetic variability of these characters has been detected, and the existence of genetic correlations between them demonstrated. A quantitative genetic approach has identified severa…
Effect of nitrogen nutrition on Medicago truncatula resistance against Aphanomyces euteiches
2016
Nitrogen (N) is a major limiting factor for plant growth. N availability can also impact plant resistance to pathogens by regulating plant immunity. To better understand the links between N nutrition and plant defense, we analyzed the impact of N availability of plant on Medicago truncatula resistance to the root pathogen, Aphanomyces euteiches, taking into account plant genetic variability. This oomycete is considered as the most limiting factor for legume production. Two conditions of N nutrition, non-limiting or deprived in N, and ten plant genotypes were tested in vitro. The results showed that the resistance is modulated by nutritional conditions, depending on plant genotype. Analysis …
Fusarium wilt of cyclamen : early detection and biocontrol
2016
Fusarium wilt of cyclamen is one of the most damaging diseases of cyclamen. The causal agent, Fusarium oxysporum f. sp. cyclaminis, is a soil-borne fungus. Losses can reach more than 50 % of the production. Several methods of control are available, but none of them offer an efficient and environmentally friendly solution. In this context, a project was developed in collaboration with the French institute of horticulture, Astredhor, which represents the producers, the INRA of Dijon, for its expertise on F. oxysporum and the company Agrene for its expertise in biological control. The project has two goals: i) design a molecular marker specific of Fusarium oxysporum f. sp. cyclaminis allowing …
Leviers génétiques pour optimiser les interactions positives plantes micro-organismes
2019
International audience
Ce cro-magnon qui est en moi !
2022
La psychologie évolutionnaire ne cesse de nous rappeler que nous sommes tous les descendants de chasseurs-cueilleurs qui ont réussi à résoudre des problèmes adaptatifs, comme trouver de la nourriture, se protéger des prédateurs, trouver un partenaire. Si nous pouvons l'ignorer en tant qu'individu, comme le présent ouvrage espère en convaincre les lecteurs, nos cerveaux le savent...La psychologie évolutionnaire, en se penchant sur le passé de notre espèce, permet de mieux comprendre le pourquoi de nos comportements présents. L’ouvrage est focalisé sur des études expérimentales (plus de 200 expériences sont relatées !) de psychologie évolutionnaire. Il s'adresse aux étudiants en psychologie e…