Abstract: This study used genomic resequencing to screen for insertion-deletion (InDel) markers that enable the identification of Cabernet Sauvignon grapes and examined their application effectiveness in Cabernet Sauvignon wine authentication. The results showed that among 13 markers selected from the whole genome, 9 InDel markers (Del-1–6, In-1, and In-4–5) with polymorphism and good amplification effect were successfully developed and validated by polymerase chain reaction (PCR). Del-2–6, In-1, and In-5 were able to distinguish between Cabernet Sauvignon and Marceline grapes. It was found that Del-2, Del-4, Del-6 could be used to distinguish between Cabernet Sauvignon and Marceline wines. These results enrich the molecular markers of grapes, providing a theoretical basis for the application of InDel markers in genetic research such as grape resource genetic diversity, variety identification, and DNA fingerprinting.

Key words: insertion-deletion molecular marker; Cabernet Sauvignon grapes; variety identification; Cabernet Sauvignon wine; authentication