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. 2023 Jul 20;14:4334. doi: 10.1038/s41467-023-40002-9

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© The Author(s) 2023

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. 1 — a Phylogenic relationship between stem lettuce and Sc. taccada. Red arrows indicate their respective families, Asteraceae and Goodeniaceae. The tree was adapted from Angiosperm Phylogeny (http://www.mobot.org/MOBOT/research/-APweb/). b Habitat, morphology, and flowers of stem lettuce and Sc. taccada. Typical habitat of Sc. taccada on a tropical beach in Sanya, Hainan Province, China (top left); Flowers of Sc. taccada (top right); Morphology of stem lettuce as a commodity in a supermarket (bottom right); Flowers of stem lettuce (bottom left). c Genome features of stem lettuce and Sc. taccada. The tracks from outer to inner circles indicate I, chromosome karyotypes; II, gene density in 1-Mb windows; III, gene expression levels (averaged FPKM in 1-Mb windows); IV, density of LTR-RTs (1-Mb windows); V, DNA transposon density (1-Mb windows); VI, GC content; VII, synteny between the two genomes.