Qin Miaomiao, Zhang Yan, Yang Yanmei, Miao Chunbo, Liu Shenkui
State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou, China.
Front Plant Sci. 2020 Sep 3;11:532771. doi: 10.3389/fpls.2020.532771. eCollection 2020.
Pre-harvest sprouting (PHS) often results in reduced grain yield and quality and is a major problem in cereal production. Improved seed dormancy would inhibit PHS. Here we show that seed-specific overexpression of two () genes and enhances seed dormancy and inhibits PHS without noticeable effects on shoot architecture in rice. In addition, seed-specific overexpression of also increases grain size and thus improves grain productivity. Furthermore, our results suggest that enhances the seed dormancy through directly regulating many genes in the gibberellin (GA) pathway. This research provides an efficient method to suppress PHS and will facilitate breeding elite crop varieties.
收获前发芽（PHS）常常导致谷物产量和品质下降，是谷物生产中的一个主要问题。改善种子休眠将抑制收获前发芽。在此我们表明，两个（）基因和在种子特异性过表达可增强水稻种子休眠并抑制收获前发芽，而对水稻地上部结构没有明显影响。此外，的种子特异性过表达还增加了谷粒大小，从而提高了谷物产量。而且，我们的结果表明，通过直接调控赤霉素（GA）途径中的许多基因来增强种子休眠。本研究提供了一种抑制收获前发芽的有效方法，并将有助于培育优良作物品种。
