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. 2022 Nov 28;13:7328. doi: 10.1038/s41467-022-35063-1

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — a Flowers of the tree peony P. ostii and four cultivars of P. suffruticosa (from top to bottom: ‘ErQiao’, ‘WuLongPengSheng’, ‘YuLouChun’ and ‘BaiXueTa’) at the blooming, coloured, and squaring stages, respectively (from left to right). Scale bars, 1 cm. b Heatmap of the subgroup expansion and expression patterns of flower development-related genes at the coloured stage and squaring stage. Po P. ostii, EQ ‘ErQiao’, WL ‘WuLongPengSheng’, YLC ‘YuLouChun’, BXT ‘BaiXueTa’, st_pe petaloid stamen. The colour of the scale bars represents relative expression. c Schematic diagram of the ABCE model in P. ostii and P. suffruticosa. d Relative expression of the AP1 gene (class A) and AG gene (class C) in petals, petaloid stamens, and stamens measured by real-time quantitative PCR. Four replicates for each gene were performed. Data were presented as the mean values ± SEMs. Source data are provided as a Source Data file.