Virulence diversity among branched broomrape (O. ramosa L.) populations in France

Issue		Agron. Sustain. Dev. Volume 25, Number 1, January-March 2005


Page(s)		123 - 128
DOI		10.1051/agro:2004059

Agron. Sustain. Dev. 25 (2005) 123-128
DOI: 10.1051/agro:2004059

Virulence diversity among branched broomrape (O. ramosa L.) populations in France

Hocine Benharrat, Christian Boulet, Catherine Theodet and Patrick Thalouarn

Groupe de Physiologie et de Pathologie Végétales, Faculté des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322 Nantes Cedex, France

(Received 30 June 2004; accepted 13 October 2004)

Abstract - In France, the obligate root parasite O. ramosa L. (broomrape) causes significant decreases in yields in several crops such as Brassica napus L., Cannabis sativa L. and Nicotiana tabacum L. Over the past few years, the broad distribution and the continuous expansion of this parasitic plant have been pointed out. The diversity of its host plants and the increase in its locations in France led us to investigate the virulence of some O. ramosa populations against their potential host plants. Significant variation in their aggressiveness was observed. These results are therefore consistent with the existence of at least two O. ramosa pathovars throughout populations scattered in France. A study by PCR of inter-simple sequence repeat (ISSR) of these two populations allowed us to characterize each of them by specific molecular markers.

Key words: broomrape / hemp / oilseed rape / virulence / pathovar

Corresponding author: Hocine Benharrat hocine.benharrat@svt.univ-nantes.fr

© INRA, EDP Sciences 2005

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.