PCR fast test method of sugarcane ratoon stunting germina
A detection method and sugarcane technology, applied in the directions of microorganism-based methods, biochemical equipment and methods, and microorganism determination/inspection, etc., can solve the problems of impractical production, poor repeatability and stability of test results, and immaturity. The results are stable, the electrophoresis results are accurate and reliable, and the detection is fast.
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[0026] The PCR quick detection method of dwarf pathogen of sugarcane perennial root comprises the steps:
[0027] Step 1. Take sugarcane juice: randomly take several sections of sugarcane in the test field, squeeze 1 to 2 mL of sugarcane juice for each and store at -20°C;
[0028] Step 2, sugarcane juice pretreatment: centrifuge at 12000rpm at 4°C for 5 minutes; remove the supernatant of sugarcane juice and leave the precipitate;
[0029] Step 3, extract the genomic DNA of RSD bacteria by improving and optimizing the CTAB method; the specific steps are as follows:
[0030] 1) Add 1 mL of 3% CTAB preheated at 65°C and 10 μL of proteinase K extract to the precipitated sugarcane juice pretreated in step 2, and mix well;
[0031] 2) Incubate at 65°C for 40-60 minutes, during which time shake well;
[0032] 3) Add an equal volume of chloroform-isoamyl alcohol (24:1) mixture, mix gently, centrifuge at 8000rpm, 4°C for 10min;
[0033] 4) Carefully absorb the supernatant, add an eq...
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