This Week in PNAS

Using the 18S ribosomal DNA gene as a barcode when looking at environmental samples may miss some members of the communities being tested, according to a study in the early, online edition of the Proceedings of the National Academy of Sciences this week by researchers based in the UK, Italy, Germany, and the US. In particular, authors of the study argue that the 18S marker underestimates the diversity of so-called meiofauna — microscopic invertebrate animals.

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In Science this week: International Wheat Genome Sequencing Consortium publishes the bread wheat cultivar Chinese Spring reference genome, and more.

At his FDA Law Blog, Jeffrey Gibbs discusses FDA's technical assistance for the draft Diagnostic Accuracy and Innovation Act.

The New York Times reports that genetic testing has uncovered unfaithful penguins at a Utah aquarium.

Cancer researcher loses funding under new Wellcome Trust anti-bullying policies, the Guardian reports.