This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Sciences, a team from the US and China report on the identification of quantitative trait loci in soybean that coincide with resistance to a pesky pest known as the southern root-knot nematode. The group sifted through shallow genome sequence data for 246 inbred paleopolyploid soybean lines generated by crossing sensitive and resistant soybeans to tally up SNPs and assign them to their original parental line.

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 Senator Lamar Alexander (R-Tenn.), who chairs the Senate health committee, will be retiring at the end of his term, Stat News reports.

UCSF researchers find that having two X chromosomes may contribute to women's longer lifespans, according to Discover's D-brief blog.

The Wall Street Journal reports on the US Centers for Disease Control and Prevention's use of genetic approaches to study foodborne illnesses.

In PNAS this week: immune cell profiling of wild baboons by social status, metabolomics profiling of esophageal tumors, and more.