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Article History

Received: 7 April 2020

Accepted: 11 September 2020

First Online: 12 October 2020

Competing interests

: J.F.P. and J.M.D. are co-inventors in patent US2017/0362601A1 that describes the use of chimeric GRF–GIF proteins with enhanced effects on plant growth (Universidad Nacional de Rosario Consejo Nacional de Investigaciones Científicas y Técnicas). J.F.P., J.D., D.M.T. and J.M.D. are co-inventors in UC Davis provisional patent application 62/873,123 that describes the use of <i>GRF–GIF</i> chimeras to enhance regeneration efficiency in plants. Vectors are freely available for research, but commercial applications may require a paid nonexclusive license. There is a patent application from KWS/BASF (WO 2019/134884 A1) for improved plant regeneration using <i>Arabidopsis</i><i>GRF5</i> and grass <i>GRF1</i> homologs. None of the authors of this manuscript is part of the KWS/BASF patent or is related to these companies. The KWS/BASF patent focuses on a different cluster of <i>GRF</i> genes than the one described in our study and does not incorporate the <i>GIF1</i> cofactor or the generation of <i>GRF–GIF</i> chimeras.