NEW YORK (GenomeWeb News) – Horses, donkeys, and zebras may have split from a shared common ancestor much earlier than once suspected, a new genome sequencing study suggests.

As they reported online today in Nature, investigators at the University of Copenhagen, BGI-Shenzhen, and elsewhere sequenced genomic DNA from the fossilized remains of a horse believed to have lived in what's now the Yukon Territory of Canada as far back as 700,000 years ago or more.

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In PNAS this week: epigenetic changes linked with high-altitude pulmonary edema, transcriptome profiling of maize leaf development, and more.

Stanford University researchers are studying top athletes to uncover genes linked to performance.

The UW's Wylie Burke and Dartmouth's Gilbert Welch argue that whole-genome testing may do more harm than good, and a related poll.

Differences in DNA methylation could be used to distinguish between DNA samples obtained from identical twins, researchers say.