Delye C.,French National Institute for Agricultural Research |
Michel S.,French National Institute for Agricultural Research |
Berard A.,French National Institute for Agricultural Research |
Chauvel B.,French National Institute for Agricultural Research |
And 4 more authors.
New Phytologist | Year: 2010
•The geographical structure of resistance to herbicides inhibiting acetyl-coenzyme A carboxylase (ACCase) was investigated in the weed Alopecurus myosuroides (black-grass) across its geographical range to gain insight into the process of plant adaptation in response to anthropogenic selective pressures occurring in agricultural ecosystems.•We analysed 297 populations distributed across six countries in A. myosuroides' main area of occupancy. The frequencies of plants resistant to two broadly used ACCase inhibitors and of seven mutant, resistant ACCase alleles were assessed using bioassays and genotyping, respectively.•Most of the resistance was not endowed by mutant ACCase alleles. Resistance and ACCase allele distribution patterns were characterized by mosaicism. The prevalence of resistance and of ACCase alleles differed among countries.•Resistance clearly evolved by redundant evolution of a set of resistance alleles or genes, most of which remain unidentified. Resistance in A. myosuroides was shaped by variation in the herbicide selective pressure at both the individual field level and the national level. © The Authors (2010). Journal compilation © New Phytologist Trust (2010).
Sok N.,AgroSupDijon |
Baglin I.,CNRS Molecular Chemistry Institute of Burgundy University |
Rousselin Y.,CNRS Molecular Chemistry Institute of Burgundy University |
Boschetti F.,CheMatech |
And 3 more authors.
New Journal of Chemistry | Year: 2016
A new synthetic method has been developed for the preparation of reinforced cyclams (1,4,8,11-tetraazacyclotetradecane) C-functionalized on the bridging unit, by using a "one pot" reaction starting from the appropriate bis-aminal cyclam intermediate. The high reactivity of quaternized aminal moiety toward nucleophilic agent has been used to elaborate a new class of cross-bridged and side-bridged cyclam derivatives containing cyanide group on the ethylene bridge. Several chelators and corresponding copper(ii) complexes have been prepared and characterized by X-ray diffraction. These new constrained polyazamacrocycles are valuable precursors of bifunctional chelating agents for the preparation of PET radiotracers. This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2016.
Hocquette J.-F.,French National Institute for Agricultural Research |
Jacquet A.,INAO |
Giraud G.,AgroSupDijon |
Legrand I.,Institute Of Lelevage |
And 3 more authors.
EAAP Scientific Series | Year: 2012
The French animal food product market is nowadays very segmented, particularly with the proliferation of quality marks relating to: (1) official labels identifying a superior quality (Label Rouge), environmental quality (organic farming) or quality linked to origin (PDO and PGI); (2) product descriptions highlighting a specific feature such as 'on-farm processed' or 'mountain produce'; (3) certification of products aimed at applying normative standards. For official labels, professionals voluntarily undertake to set up and monitor a quality-focused approach individually (organic farming) or collectively (PDO, PGI, Label Rouge). Independent and competent bodies carry out regular checks, and the public authorities supervise the system. Fresh beef and lamb under quality schemes represent about 6% and 15% of French meat production. Geographical indications identify a product as originating from a region, when a given and unique trait is attributable to this region. Protected Designation of Origin (PDO) was firstly developed mainly for dairy products. The integration of local breeds into PDO includes all PDO ewe cheeses, the majority of PDO meat, about half of PDO cow cheeses and a third of PDO goat cheeses. The breed may contribute to the product's specificity or may be mainly a means of differentiation and a marketing claim. The evolution of demand results from changes in: (1) demographic composition and way of life of consumers; (2) characteristics of agriculture and food products; and (3) preferences of consumers for specific attributes (e.g. taste, health and locality). For beef, French consumers seem to favour a beef eating-quality guarantee. The market outcome of certification programmes depends upon consumer awareness, understanding and confidence in high quality labels.
Journaux L.,AgroSupDijon |
Simon J.-C.,AgroSupDijon |
Destain M.F.,FUSAGX |
Cointault F.,AgroSupDijon |
And 2 more authors.
Precision Agriculture | Year: 2011
In the context of plant leaf roughness analysis for precision spraying, this study explores the capability and the performance of some combinations of pattern recognition and computer vision techniques to extract the roughness feature. The techniques merge feature extraction, linear and nonlinear dimensionality reduction techniques, and several kinds of methods of classification. The performance of the methods is evaluated and compared in terms of the error of classification. The results for the characterization of leaf roughness by generalized Fourier descriptors for feature extraction, kernel-based methods such as support vector machines for classification and kernel discriminant analysis for dimensionality reduction were encouraging. These results pave the way to a better understanding of the adhesion mechanisms of droplets on leaves that will help to reduce and improve the application of phytosanitary products and lead to possible modifications of sprayer configurations. © 2010 Springer Science+Business Media, LLC.