Contents

17 August 2018
Vol 361, Issue 6403

About The Cover

Cover image expansion

COVER Spikes of bread wheat (Triticum aestivum), a hybrid of three distinct genomes. Scientists have recently completed sequencing of a high-quality reference wheat genome and identified how the three ancestral genomes work at a genetic level to form a staple of human nutrition. See pages 635, eaar7191, and eaar6089.
Photo: Christian Vidal/Science Source