Effects on isolating pear genomic DNA by using SDS,CTAB,SDS-CTAB,improved CTAB,high salt-low pH and fractional centrifugation are analyzed and compared. Seven varieties of pear are used.

• 以 7个梨品种为实验材料 ,比较分析了SDS法、CTAB法、SDS CTAB法、改良的CTAB法、高盐低pH值法、分步离心法对梨总DNA提取的效果。