This Week in PNAS

Scientists from the National Institute of Genomic Medicine in Mexico present an analysis of genomic diversity in Mexican Mestizo populations. The research was done with the goal of creating a better foundation for genomic medicine targeting Mexicans. "Our results provide evidence of genetic differences between Mexican subpopulations that should be considered in the design and analysis of association studies of complex diseases," the authors write.

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

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

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

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