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The long hard road to a completed Glomus intraradices genome
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International audience. With the public release of the Populus genome (Tuskan et al., 2006), the United States Department of Energy’s Joint Genome Institute (JGI) embarked on an effort to create a community wide genomics resource for bacterial and fungal associates of Populus (Martin et al., 2004). Included in the list of species were several Populus endophytes (Burkholderia cepacia, Pseudomonas putida, Enterobacter spp., Serratia proteamaculans, Stenotrophomonas maltophilia; http://genome.jgi-psf.org/ draft_microbes/), Laccaria bicolor (Martin et al., 2008), Melampsora laraci-populina (http://www.jgi.doe.gov/sequencing/ why/3088.html) and Glomus intraradices (http://www.jgi. doe.gov/sequencing/DOEmicrobes2004.html). Ideally, the development of genomic tools for these organisms will facilitate the study of Populus and of its microbial associates in experimental and natural environments using whole-genome microarrays, models of predicted metabolite and protein interactions, cross-species promoter analyses and molecular surveys of community diversity. Together these resources will provide the possibility to take a holistic approach in understanding how symbionts and pathogens interact with the host tree in contrasting environments. The production of a completely annotated and assembled G. intraradices genome has proven to be an especially arduous challenge and, after 4 yr of effort, it is not yet at hand. In this context, a workshop was held by the Glomus Genome Consortium (GGC) on September 16–17, 2008, in Nancy, France, to review the progress that has been made to date on the Glomus genome.
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