Weed Warnings

Results from a recent study by London psychiatrists, published in Biological Psychiatry, suggest that marijuana smokers of a certain genotype may find themselves at a higher risk of cannabis-related psychosis.

The researchers conducted a case-control study of 489 first-episode psychosis patients and 278 control subjects looking at variation at the rs2494732 SNP in the gene AKT1 and how it might be associated with cannabis-associated psychosis.

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Technology Review reports that researchers in the US have used CRISPR to modify a number of human embryos.

Plant researchers plan to sequence some 10,000 samples that represent the major plant clades, ScienceInsider reports.

By introducing genes from butterfly peas and Canterbury bells, researchers in Japan have developed a blue chrysanthemum, according to NPR.

In Nature this week: a Danish reference genome, and more.