红枣活性成分及其生物活性研究进展

红枣中的活性成分以多糖、黄酮类、环核苷酸类、多酚类、五环三萜类、生物碱为主，具有抗氧化、免疫调节及抗肿瘤、保护肝脏、降血糖、抗炎等多种生物活性。本文综述了红枣中活性成分及生物活性的研究进展，并对红枣产业的发展进行展望，为红枣中活性成分的开发与利用提供科学依据。

Applications and Prospect of Genome Editing Techniques in Precise Potato Molecular Breeding

After nearly a decade of rapid development,genome editing techniques have become powerful tools for gene function research and precise molecular breeding.These technologies mainly result in the DNA insertion or deletion mutation at the target site by causing doublestranded DNA fracture at these sites and triggering the repair mechanisms of the cells.With the implementation of the national strategy of using potato as staple diet,people’s demand for potato varieties will become more and more multi-faceted,and genome editing will provide efficient and fast technical approaches for directed genetic improvement and precise molecular breeding in potato.In this paper,the principles of three mainstream genome editing techniques were briefly reviewed,their applications in improvement and precise molecular breeding of potato varieties were retrospected,significance and present problems of these techniques in potato precision molecular breeding were discussed,and the future application of genome editing in potato molecular breeding was prospected,aimed at providing reference and new ideas for future potato precision molecular breeding.