Natural variation in Glume Coverage 1 causes naked grains in sorghum

文献类型： 外文期刊

第一作者： Xie, Peng

作者： Xie, Peng;Tang, Sanyuan;Chen, Chengxuan;Zhang, Huili;Yu, Feifei;Li, Chao;Wei, Huimin;Wu, Yaorong;Xie, Qi;Xie, Peng;Chen, Chengxuan;Wei, Huimin;Xie, Qi;Sui, Yi;Wu, Chuanyin;Diao, Xianmin

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：17.694； 五年影响因子：17.763 ）

ISSN：

年卷期： 2022 年 13 卷 1 期

页码：

收录情况： SCI

摘要： Low glume coverage is the preferred for easy threshing in grain production, but the genetic basis remains unclear. Here, the authors report the gene GC1, which encodes an atypical G protein gamma subunit, negatively regulates sorghum glume coverage and the naturally truncated alleles can be useful in the naked grain breeding. One of the most critical steps in cereal threshing is the ease with which seeds are detached from sticky glumes. Naked grains with low glume coverage have dramatically increased threshing efficiency and seed quality. Here, we demonstrate that GC1 (Glume Coverage 1), encoding an atypical G protein gamma subunit, negatively regulates sorghum glume coverage. Naturally truncated variations of GC1 C-terminus accumulate at higher protein levels and affect the stability of a patatin-related phospholipase SbpPLAII-1. A strong positive selection signature around the GC1 genic region is found in the naked sorghum cultivars. Our findings reveal a crucial event during sorghum domestication through a subtle regulation of glume development by GC1 C-terminus variation, and establish a strategy for future breeding of naked grains.

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