Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free:

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site:, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Google Analytics

Targeted advertising cookies


The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at or by post at:

24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal IN-SYLVA France ONF FCBA CIRAD CNPF OFB Université de Rouen

Home page

GEN4X Network (Forest Genetics Network for Research and Experimentation)

Network's name
GEN4X Network (Forest Genetics Network for Research and Experimentation)
Coordination : INRAE, Avignon
The entire France metropolitan

Localisation des plantations comparatives par espèce

Location of comparative plantations (by species) composing part of the infrastructure. Their management is carried out by 3 INRAE experimental units: GBFOR [North-Central-East], UEFP [Atlantic coast], UEFM [Mediterranean area].  Note that not all the maritime pine and poplar systems are shown on the map.


The network is made up of all types of devices known as "common gardens", which make it possible to compare species or several genetic units of the same species (geographical origins, families, clones) under various controlled environmental conditions. These common gardens sites were originally designed to study the natural diversity of different forest species and to create improved reforestation materials.  In 2009, the department in charge of forest ecosystems at INRAE grouped some of these common gardens (comparative plantations) into a network called "PlantaComp". In 2018, PlantaComp became the GEN4X Network (Forest Genetics Network for Research and Experimentation); it includes all types of devices from arboretums to clonal-testing and population-improvement sites.

The GEN4X Network hosts an exceptional inter- and intra-specific heritage. Since the first plantations were set up in the 1960s, nearly a thousand test plots have been installed on more than 2,000 ha, representing about 2.5 million planted trees. Plant material from several dozen species has been tested, of which about fifteen are currently being closely monitored (oak, poplar, cherry, beech and ash for deciduous trees; and maritime pine, Douglas fir, larch, Scots pine, silver fir, Mediterranean pine, cypress and cedar for conifers).

The main scientific issues addressed by the Network are related to the mitigation and adaptation of forests to climate change, the conservation and sustainable use of biodiversity, and protecting forests from health risks.


The Network offers its services for experimentation, observation, conservation of biological resources as well as data production and management. Examples include: measurements for height, and radial growth; observations of survival, phenology, fruiting, pest and disease resistance; leaf and seed harvests; technical files of data and metadata.


The Network's experiments have been set up throughout mainland France and are managed by the various experimental units (UE) of INRAE's ECODIV department (see map) in close collaboration with researchers (one reference researcher per species or group of species).

Work description

The sites in this network are open to INRAE researchers and other French and international research organizations to answer research or development questions within the framework of their research projects or in more formal collaboration (collaborative projects or research agreements). The sites are also open to teachers and trainers for all levels of training. Other access needs are discussed on a case-by-case basis.

Data access and cost

The costs are marginal for INRAE ECODIV research units and their partners.


Detailed technical records of the observations and measurements from the existing genetic units and sites. The data are maintained and partially integrated in local information systems specific to ECODIV and to a national information system, "GnpIS" ( Some sites are equipped with portable weather stations.

Data set

Michotey, Celia; Vauthier, Denis; Fady, Bruno, 2021, "Phenotypic trait dataset of Pinus pinea measured in the common gardens of the Forest Genetics Network for Research and Experimentation (GEN4X)",, Portail Data INRAE, V1

Ducatillion, Catherine; Lamant, Thierry; Bellanger, Richard; Bouttier, Valentin; Bastien, Jean-Charles; Michotey, Celia; Gautier, Laurent; Fady, Bruno; Musch, Brigitte, 2021, "Survival and growth of 711 forest tree taxa in eight French arboretums from three different climate regions",, Portail Data INRAE, V1

Michotey, Celia; Anger, Christel; Albet, Audrey; Bastien, Catherine; Bastien, Jean-Charles; Bernier, Frédéric; Chancerel, Emilie; Dowkiw, Arnaud; Ducousso, Alexis; Gauvrit, Christophe; Issenhuth, Bernard; Kremer, Antoine; Laffitte, Baptiste; Lefèvre, François; Muratorio, Sylvie; Pâques, Luc; Pastuszka, Patrick; Pichot, Christian; Plomion, Christophe; Raffin, Annie; Rei, Franck; Santi, Frédérique; Séverin, Laurent; Thevenet, Jean; Vauthier, Denis; Veisse, Dominique; Verger, Michel; Villar, Marc; Fady, Bruno, 2021, "Datasets from common gardens of the Forest Genetics Network for Research and Experimentation (GEN4X)",, Portail Data INRAE, V1