Vegetative biomass production under different inorganic nitrogen forms of the USDA rice (Oryza sativa L.) diversity panel 1

We characterized early vegetative biomass production in response to
inorganic nitrogen source, ammonium (NH4+) or nitrate (NO3–), in 390
accessions from the USDA Rice Diversity Panel 1, which contains broad
genetic diversity from the global germplasm. We grew these
accessions under NO3– versus NH4+ nutrition, and under different
concentrations of NH4+ as sole nitrogen sources in a greenhouse with
day/night temperatures approximately 28°/24°C under natural sunlight in
Davis, California (38°32'20.2"N 121°46'52.5"W) in
2018-2019. This dataset contains dry biomass (g) at three weeks after
transplanting. We used the biomass data as inputs for Genome-Wide
Association Analyses, with the genotype data publicly available from
http://ricediversity.org/.