Addendum to:Naturehttps://doi.org/10.1038/s41586-022-04822-xPublished online 8 June 2022
By analyses of potato pan-genome and transcriptome, we discovered a TCP transcription factor,Soltu.DM.06G025210, determining tuber identity, on the basis of which we named this geneIdentity of Tuber 1(IT1).
After our manuscript was accepted in principle, a study by Nicolas et al.1showed thatBRANCHED1bacts as a tuberization repressor in aerial axillary buds in tetraploid potato. We note thatIT1andBRANCHED1bare the same gene. The nameBRANCHED1brepresents theA. thaliananomenclature system2. We chose the nameIT1because the function ofSoltu.DM.06G025210in potato had not been reported before and our study suggests that it acts as a key regulator in potato tuberization, a new function that is different from its orthologue in tomato andArabidopsiswhere it represses branching. Considering the difference in the function, we proposed the new nameIT1forSoltu.DM.06G025210.
Both studies confirmed that IT1/BRANCHED1b interacts with the mobile tuberization inductive signal SP6A and plays an essential role in tuberization. Further investigation is awaited into how the same gene promotes tuberization in underground shoots (stolons) and represses tuberization in aerial axillary buds
References
Nicolas, M. et al. Spatial control of potato tuberization by the TCP transcription factor BRANCHED1b.Nat. Plants8, 281–294 (2022).
Martín-Trillo, M. et al. Role of tomato BRANCHED1-like genes in the control of shoot branching.Plant J.67, 701–714 (2011).
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Tang, D., Jia, Y., Zhang, J.et al.Addendum: Genome evolution and diversity of wild and cultivated potatoes.Nature609, E14 (2022). https://doi.org/10.1038/s41586-022-05298-5
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DOI:https://doi.org/10.1038/s41586-022-05298-5
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