This Week in PNAS

This week in the PNAS Early Edition, an international research team led by investigators at the University of British Columbia reports "insights, from genome and transcriptome analyses, into how [Grosmannia clavigera] tolerates conifer-defense chemicals, including oleoresin terpenoids, as they colonize a host tree." G. clavigera, the authors note, is a "critical component of" the current mountain pine beetle outbreak, as it is in symbiosis with mountain pine beetle, but pathogenic in lodgepole pine trees.

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The apple has traveled westward and eastward along the Silk Road, according to a new genetic analysis.

In Nature this week: GWAS data used to reposition drugs for psychiatric use, and more.

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