数字农科院2.0

Engineering synthetic apomixis in different hybrid rice varieties using the Fix strategy

文献类型： 外文期刊

作者： Chaolei Liu;Jian Wang;Hongwei Lu;Yong Huang;Huijing Yan;Huan Liang;Chun Wang;Kejian Wang

作者机构：

关键词： Apomixis;Fix strategy;Genetic background;Hybrid rice

期刊名称： New Crops

ISSN： 2949-9526

年卷期： 2025 年 1 卷

页码：

收录情况： 无来源刊（2024版）

摘要： Hybrid rice breeding has significantly increased the yield and stability of rice production. However, due to trait segregation in F2 progeny seeds, the F1 hybrid seeds must be renewed annually. Apomixis is a form of reproduction leading to clonal seeds, which has a revolutionary potential in fixing heterosis and realizing selfretention of hybrid rice seeds. Previously, we successfully engineered synthetic apomixis in rice by combining Mitosis instead of Meiosis (MiMe) with haploid induction (mutation of MATRILINEAL), a strategy known as Fix for Fixation of hybrids. However, only one hybrid rice variety has been tested for the Fix synthetic apomixis system. In this study, we expanded the application of the Fix strategy and achieved synthetic apomixis in multiple hybrid rice varieties. We observed significant variations in seed setting rate across diverse genetic backgrounds and witnessed a remarkable tenfold increase in clonal seed efficiency. Our findings will provide valuable insights into the application of the Fix strategy for synthetic apomixis in hybrid rice.

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