Molecular identification, ITS sequence analysis16
After a strain 28 subculture was grown in an Erlenmeyer flask (250 mL) containing 150 mL of potato dextrose broth (PDB) (200 g L−1 potato and 20 g L−1 dextrose, initial pH 6.6–7.0) at 130 revolutions per minute (rev min−1) for 7 d at 26 °C, the mycelia and broth were separated by vacuum suction filtration. The mycelia were then scraped from the filter and ground into powder with the aid of liquid nitrogen. Genomic DNA was extracted by CTAB method.17 The