The invention relates to an isothermal amplification method for detecting cry1Ac-transfected sugarcane. The method comprises the steps of extracting sugarcane template
DNA (Deoxyribonucleic Acid), establishing an isothermal amplification
system and identifying an isothermal amplification product. According to the isothermal amplification method for detecting the cry1Ac-transfected sugarcane, four
specific primers are designed aiming at base sequences of an exogenous
target gene cry1Ac of stem-borer-resistant transgenic sugarcane, and a chain-displacement amplification reaction is carried out under the action of
polymerase Bst, so that the specificity is high; meanwhile, the amplification reaction can be completed by only a water bath kettle and a normal-temperature low-speed
centrifuge capable of completing instant
centrifugation, so that instruments and equipment required are simple, the amplification cost is relatively lower compared with that of the conventional PCR (
Polymerase Chain Reaction) technology, which needs a gel scanning
system and a PCR (or real-time PCR) instrument, which are expensive, and the like, the amplification time is short, the amplification efficiency is high, and the result viewing is visual and convenient due to visual
color reaction; and after the
system is established, extracted
DNA of a sugarcane
genome directly serves as a template, so that the method is applicable to the cry1Ac-transfected sugarcane screening of laboratories and fields and the detection and tracking of cry1Ac ingredients and has the advantages of low cost, rapidness, sensitivity, simplicity and accuracy.