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 Rennes 1 University Logo Igepp

Home page

Phylloxera Genome Project

Phylloxera Genome Project

  • Started in 2010. In the frame of the International Aphid Genomics Consortium (IAGC) and i5k.
  • Funded by INRAE and BGI.
  • Steering Committee: François Delmotte (INRAE Bordeaux), Claude Rispe (INRAE Nantes), Fabrice Legeai (INRAE Rennes, AphidBase), Denis Tagu (INRAE Rennes), i5k.
  • Contact:

Grape phylloxera (Daktulosphaira vitifoliae Fitch) is a historical pest of grapevine with worldwide economic and ecological importance. Phylloxera is native to the eastern United States of America where its natural hosts are American Vitis species. These natural hosts show varying levels of resistance to the insect and a few accessions of Vitis spp. have been used to produce rootstocks for use in commercial viticulture worldwide. The use of such rootstocks is, to‐date, the only means by which economically viable grape production can be reliably maintained from Vitis vinifera in a phylloxera‐infested vineyard. If the recent release of the grape genome has accelerated rootstock breeding programmes, the long‐term stability of the host‐plant resistance is conditioned to the non emergence of virulent phylloxera strains. However, there has been recent evidence in Australia of the emergence of two apparently resistant phylloxera clones, which suggests that previously host‐resistant plants can now be susceptible to phylloxera. In contrast with the accurate and detailed historic studies on the biology of this insect, genetic information is still quite limited on this potentially dangerous species for a major crop.


We propose the sequencing of the phylloxera (Daktulosphaira vitifoliae Fitch) genome through an integrated approach. Phylloxera, because of its basal phylogenetic relationship to aphids, provides an interesting model for comparative genomics between aphids (in the broad sense). The phylloxera sequence will also fill the gap between aphids and related taxa such as bugs, cicadas and leafhoppers, psyllids and whiteflies. Knowledge of the genome of the phylloxera will considerably improve our understanding of many of the specific biological features of this invasive pest. This include identifying genes for complex traits including those with relevance to the genetic basis of host‐plant interaction, to leaf gall and root formation, to nutrition on grape, and to the developmental causes of extreme phenotypic plasticity. Finally, knowledge of the phylloxera genome is also relevant to human and economic well being by participating to reduce environmental cost and risk in viticulture.