In many non-cultivated angiosperm species, seed dispersal is facilitated by the shattering of the seed head at maturity; in the Triticeae tribe, to which several of the world's most important cereals belong, shattering takes the form of a disarticulation of the rachis. The products of the genes Btr1 and Btr2 are both required for disarticulation to occur above the rachis nodes within the genera Hordeum (barley) and Triticum/Aegilops (wheat). Here, it has been shown that both Btr1 and Btr2 are specific to the Triticeae tribe, although likely paralogs (Btr1-like and Btr2-like) are carried by the family Poaceae including Triticeae. Aegilops tauschii (the donor of the bread wheat D genome) lacks a copy of Btr1 and disarticulation in this species occurs below, rather than above the rachis node; thus, the product of Btr1 appears to be required for disarticulation to occur above the rachis node.
|Journal||Frontiers in Plant Science|
|State||Published - 22 Jul 2020|
Bibliographical noteFunding Information:
We thank Prof. A Sharon (Tel Aviv University) to provide the genomic data of Ae. longissima, Dr. V Korzun (KWS SAAT SE) to provide the data of S. vavilovii, Prof. MC Luo (University of California, Davis) to provide the photos of Ae. tauschii. We thank Prof. T Koba, Dr. T Oikawa, and Dr. M Ohta for their kind help and advice. We thank Dr. R Koebner for careful revision of the manuscript.
© Copyright © 2020 Zeng, Mishina, Jia, Distelfeld, Maughan, Kikuchi, Sassa and Komatsuda.
- seed dispersal
ASJC Scopus subject areas
- Plant Science