with a final extension at 72°C for 7 min. Each 25-ll PCR reaction consisted of 0.25 ll rTaq DNA polymerase(TaKaRa, Otsu, Japan), primers ITS5 and ITS4 (5.0 lM each) (Gardes and Bruns 1993), and PCR buffer. The PCR product was purified with Exo-SAP IT (GE Healthcare,Waukesha, WI, USA) and sequenced using the BigDyeTerminator v3.1 Cycle sequencing kit (Applied Biosystems) with the same primers used for PCR amplification.
Sequences were determined with a 3130 xl genetic analyzer (Applied Biosystems). Forward and reverse sequences were assembled using the program Seqman (DNAStar,Madison, WI, USA), and the consensus sequence obtained was deposited in GenBank as accession AB470483