A comprehensive map of rice quantitative trait nucleotides (QTNs) and inferred QTN effects is published in Nature Genetics this week, providing a genomic resource for one of the world's most agronomically important plants. Scientists from Shanghai Normal University built the map using eight genome-wide association study cohorts, then applied population genetics to show that domestication, local adaptation, and heterosis are all associated with QTN allele frequency changes in rice.