OsWUS-driven synthetic apomixis in hybrid rice

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来源：

ScienceDirect

全文链接：

//agri.nais.net.cn/topic/downloadFile/8c2d9400-80ad-4557-8e70-70d108143aa9

来源地址：

https://www.sciencedirect.com/science/article/pii/S2590346224005327?via%3Dihub

资源所属：

粮食和食物安全专题

类型：

学术文献

语种：

英语

原文发布日期：

2024-09-19

摘要：

Heterosis is fundamental to enhancing agricultural productivity and significantly boosting food security. However, the advantageous phenotypes of heterosis in F1 hybrids are lost in subsequent generations due to random segregation of chromosomes and meiotic recombination, and thereby trait segregation, necessitating substantial annual reinvestment in seed production. Apomixis, a form of asexual reproduction through seeds, circumvents these issues by maintaining heterozygous genotype of hybrids across generations, thus preserving trait uniformity and enhancing heterosis utilization (Underwood and Mercier, 2022; Xiong et al., 2023). Despite its promise, apomixis does not naturally occur in major crops. Recently, synthetic apomixis, integrating MiMe (Mitosis instead of Meiosis) with a mutation in the endogenous rice gene MTL (MATRILINEAL) or through the ectopic expression of rice’s endogenous genes BBM1 (BABY BOOM 1) or BBM4, or the PAR (PARTHENOGENESIS) gene from apomictic dandelion, enables the clonal reproduction of F1 hybrids through seeds and stable transmission of heterotic phenotypes over generations (Khanday et al., 2019; Liu et al., 2022; Song et al., 2024; Underwood et al., 2022; Vernet et al., 2022; Wang et al., 2019; Wei et al., 2023). However, the discovery of rice endogenous genes capable of inducing apomixis remains limited, hindering the optimization and innovation of existing synthetic apomixis systems. In this study, we uncovered that the rice endogenous gene OsWUS (OsWUSCHEL) can be engineered to induce synthetic apomixis, ensuring clonal seed production without compromising seed-setting rates in hybrid rice.