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. 2018 Oct 9;9:1450. doi: 10.3389/fpls.2018.01450

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Copyright © 2018 Sigel, Schuettpelz, Pryer and Der.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Cladogram of the best maximum likelihood tree of land plant Type II MADS-box sequences. Specific MADS-box genes, as described by Kwantes et al. (2011) and Gramzow and Theissen (2013), are indicated by black lines or along branches. Colored lines indicate the taxonomic identity of particular sequences (see inset legend). Colored dots and text describes the number of transcripts that are phase-specific or phase up-regulated in the ferns Polypodium amorphum (red) and Lygodium japonicum (yellow). Node support values are provided at Figshare (doi: 10.6084/m9.figshare.c.4229141).