Establishment and orthogonal optimization of ISSR-PCR amplification system in Salvia miltiorrhiza Optimization for ISSR-PCR reaction system on Schisandra henryi by orthogonal design Orthogonal optimization of extract technology for ursolic acid from Sambucus chinensis Optimization of ISSR-PCR System for Paris vertcillata Optimization for ISSR-PCR reaction system on Schisandra henryi by orthogonal design Establishment and Optimization of ISSR-PCR Reaction System for Iris lacteal Establishment and Optimization of an ISSR-PCR Reaction System for Chieh-qua Using Othogonal Design