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. 2020 Nov 20;18:171. doi: 10.1186/s12915-020-00909-x

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© The Author(s) 2020

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 5 — Upregulation of H3K9me2 demethylase genes and histone genes and downregulation of H3K9me2 methyltransferase genes in ETW. a Representative immunofluorescence images with antibodies against H3K9me2 in metaphase cells of five wheat species. Scale bar = 10 μm. b Relative immunofluorescent intensities of H3K9me2 per chromosome for samples in a. Error bars indicate standard deviation with double asterisks showing a significance level of P < 0.01. c Two H3K9me2 histone methyltransferase genes SDG710 and SDG709 in rice and homoeologs in wheat with their expression levels in NHW, ETW, and RHW. d Histone H3K9me2 demethylase genes (JMJ706 and its related genes) in rice and wheat with expression levels in NEW, ETW, and RHW. e Heatmaps show gene expression levels (left) and CHG methylation levels in promoter regions (right) of upregulated histone H2A, H2B, and H4 genes in ETW. f An example showing hypomethylation and upregulation of an H2A gene in ETW. The box indicates the DMR region. Scales are 0–1 for CG and CHG and 0–0.5 for CHH