The soft glumes of common wheat are sterile-lemmas as dete fined by the domestication gene Q

文献类型： 外文期刊

第一作者： Song, Gaoyuan

作者： Song, Gaoyuan;Sun, Guoliang;Kong, Xingchen;Jia, Meiling;Wan, Ke;Ye, Xingguo;Geng, Shuaifeng;Mao, Long;Li, Aili;Zhou, Yun

作者机构：

关键词： Floret development; Spike morphology; Sterile lemma; Wheat

期刊名称：CROP JOURNAL （ 影响因子：4.407； 五年影响因子：5.687 ）

ISSN： 2095-5421

年卷期： 2019 年 7 卷 1 期

页码：

收录情况： SCI

摘要： The Q gene in common wheat encodes an APETALA2 (AP2) transcription factor that causes the free threshing attribute. Wheat spikelets bearing several florets are subtended by a pair of soft glumes that allow free liberation of seeds. In wild species, the glumes are tough and rigid, making threshing difficult. However, the nature of these "soft glumes", caused by the domestication allele Qis not clear. Here, we found that over expression of Qin common wheat leads to homeotic florets at glume positions. We provide phenotypic, microscopy, and marker genes evidence to demonstrate that the soft glumes of common wheat are in fact lemma-like organs, or so-called sterile-lemmas. By comparing the structures subtending spikelets in wheat and other crops such as rice and maize, we found that AP2 genes may play conserved functions in grasses by manipulating vestigial structures, such as floret-derived soft glumes in wheat and empty glumes in rice. Conversion of these seemingly vegetative organs to reproductive organs may be useful in yield improvement of crop species. 0 2018 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license.

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