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. 2020 Jul 22;11:1000. doi: 10.3389/fpls.2020.01000

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Copyright © 2020 Zeng, Mishina, Jia, Distelfeld, Maughan, Kikuchi, Sassa and Komatsuda

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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Spike disarticulation in Triticeae species. (A) In the mature spike, disarticulation can occur either (1) above the rachis nodes, (2) above the lowest rachis node, (3) below the rachis nodes, (4) below the rachilla nodes, or (5) below the glumes. (B) Disarticulation above the rachis node produces a wedge-type dispersal unit, while (C) disarticulation below the rachis node produces a barrel-type dispersal unit. (D, E) Barrel-type brittle rachis generated from Ae. tauschii (accession: AL8/78). Spike before (D) and upon (E) maturity was shown. Arrows indicate the disarticulation point.