The Brittle Rachis Trait in Species Belonging to the Triticeae and Its Controlling Genes Btr1 and Btr2
The Brittle Rachis Trait in Species Belonging to the Triticeae and Its Controlling Genes Btr1 and Btr2
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DOI：
10.3389/fpls.2020.01000
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发表时间：
2020-07-22
影响因子：
5.6
通讯作者：
Komatsuda, Takao
中科院分区：
文献类型：
--
作者：
Zeng, Xiaoxue;Mishina, Kohei;Komatsuda, Takao
在许多非栽培被子植物物种中，成熟时种头的粉碎促进了种子的传播；在世界上几种最重要的谷物所属的小麦族中，粉碎的形式是轴的脱节。在大麦属(大麦)和小麦/山羊草属(小麦)中，Btr1和Btr2基因的产物都是在轴节以上发生脱节所必需的。在这里，已经证明了Btr1和Btr2都是小麦族特有的，尽管包括小麦科在内的Poaceae家族可能携带有类似Btr1和Btr2的对虾。节节山羊草(面包小麦D基因组的供体)缺乏Btr1的副本，并且在本种中脱节发生在轴节下面，而不是在轴节之上；因此，Btr1的产物似乎是发生在轴节上方脱节所必需的。
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.