Sequence analysis and phylogeny
SeqMan software (DNASTAR Inc., Madison, WI, USA) was used to assemble the obtained sequences, which were uploaded to the NCBI database for blast. The ClustalW method (MEGA X, www.megasoftware.net) was used for the sequence comparison using the neighbor-joining method to construct phylogenetic trees after estimation of genetic distance (Kimura two-parameter method). A bootstrapping test was performed 1,000 times.