opporunity
1.Those patients without nonspecific symptoms at early stage had mostly lost the opporunity of surgical therapy when pancreatic cancer was detected at advanced stage.
2.The ratio was 81.25 percent that could produce perithecium after crossing with parents in the 32 sexual hybridization F2. Therefore, the mating type of the Setosphaeria turcica inclined to the bisexual, which increased the opporunity of the sexual hybridization and selectivity and it made the degree of the aberrance more complex. 256 primers were designed and EcoRI-GG and MseI-GC were defined as the best primer in AFLP in this study.

