biostudies-literatureMakino AJSPS KAKENHI12231https://www.ebi.ac.uk/biostudies/studies/S-EPMC7376063biostudies-literatureUnknown10(1)To increase the yield potential while limiting the environmental impact of N management practices is an important issue in rice cultivation. The large-grain rice cultivar Akita 63 showed higher N-use efficiency for grain production. To elucidate this, we analyzed yield characteristics of Akita 63 in comparison with those of a maternal cultivar, Oochikara with a large grain, a paternal cultivar, Akita 39 with a normal grain, and a Japanese leading cultivar, Akitakomachi. The yields of Akita 63 were 20% higher than those of Oochikara and Akita 39, and 50% higher than those of Akitakomachi for the same N application. Akita 63 showed superior N uptake capacity. Whereas a trade-off between single grain weight and grain number was found for Oochikara, Akita 63 did not show such a relationship. TScientific reportsHigh yielding ability of a large-grain rice cultivar, Akita 63.PMC7376063JP16H06379Kondo ESuzuki YObara MIshiyama KMakino AKaneta YKanno KMae TfalseHigh yielding ability of a large-grain rice cultivar, Akita 63.To increase the yield potential while limiting the environmental impact of N management practices is an important issue in rice cultivation. The large-grain rice cultivar Akita 63 showed higher N-use efficiency for grain production. To elucidate this, we analyzed yield characteristics of Akita 63 in comparison with those of a maternal cultivar, Oochikara with a large grain, a paternal cultivar, Akita 39 with a normal grain, and a Japanese leading cultivar, Akitakomachi. The yields of Akita 63 were 20% higher than those of Oochikara and Akita 39, and 50% higher than those of Akitakomachi for the same N application. Akita 63 showed superior N uptake capacity. Whereas a trade-off between single grain weight and grain number was found for Oochikara, Akita 63 did not show such a relationship. T2020-01-01T00:00:00Z2020 Jul2025-04-05T10:53:23.929Z2025-04-05T10:53:23.929ZS-EPMC73760633269937010.1038/s41598-020-69289-0