Markers and method for screening germplasm resources of litchi with high resistance to downy blight

The invention discloses a marker and a method for screening germplasm resources of litchi with high resistance to downy blight. The marker is scopoletin. The inventor of the invention explores that scopoletin can be used as a marker for screening litchi germplasm resources with high resistance to downy blight, and determines the standard of scopoletin content for screening litchi germplasm resources with high resistance to downy blight, and the method for screening litchi germplasm resources with high resistance to downy blight has the advantages of simple operation, short time consumption, small sample demand and strong reliability, and can be used for screening litchi germplasm resources with high resistance to downy blight. The method can be applied to large-batch resource sample screening. 本发明公开了一种筛选高抗霜疫病荔枝种质资源的标志物和方法，所述标志物为东莨菪内酯。本发明的发明人发掘了东莨菪内酯可以作为筛选高抗霜疫病荔枝种质资源的标志物，并确定了筛选高抗霜疫病荔枝种质的东莨菪内酯含量的标准，本发明的筛选高抗霜疫病的荔枝种质资源的方法，操作简单、耗时短、需样量少、可靠性强，可应用于大批量的资源样品筛选。