NEW YORK, March 21 - A project to develop an integrated genetic and physical map of the maize genome is roughly halfway done.

The integrated map will allow a gene or genetic trait to be cross referenced to a location on the physical map. It will also provide a template for mapping and identification of the roughly 30,000 to 50,000 genes in the maize genome.

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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.