| Studies on the heredity differentiation among the vegetative compatibility group( VCG) and the relationship of the vegetative compatibility group and physiologic race of Fusarium oxysporum f. sp. Vasinfectum in Xinjiang ,adopting morphology identification,vegetative compatibility and (DNA)RAPD Analysis .For the purpose of being clear about the population distribution and the relationships of the physiologic race and the VCG of the cotton-wilt Fusarium. The experiment results indicated that 349 isolates belong to three different VCGs (I,II,III), there are 339 isolates in the first group (I) ,they are compatible to 7 physiologic race and incompatible to 3 physiologic race and 8 physiologic race,we named VCG1.The II and III are incompatible to 3,7,8 physiologic race, we temporary named VCG-xj2 and VCG-xj3,the first group(I)isolates belong to 7 race,They distributed all Gathering areas,unknown group distributed a few areas,namely, the 7 race is still dominant race in Fusarium oxysporum f .sp. Vasinfectum in Xinjiang .however, other physiologic race also possible exits ,This result shows that there is no difference compared with the experiment by Zhang li , Li guo-ying and previous research, the population components of the cotton-wilt Fusarium have not changed, yet ,but consistence investigation and study to unknown group is essentialThe RAPD experiment results indicated that all experiment isolates genetic relationship compared with 3 physiologic race is farther,but compared with 7,8 race standard isolates is nearer. This result shows that there is difference compared with the previous research results. There exits certain difference in genetic relationships of the same CVG and different CVG. The isolates of II III groups genetic relationship compared with other experiment isolates is farther, these isolates need further research.Thus it can be see that 7 race is dominant race ,different isolates and different VCG exit certain difference .
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