The Study Of Genetic Diversity And Plant Systematics Of Zygophyllum L. In Inner Mongolia

In order to research the Zygophyllum L plant and its close-kinds in ALXA on geographical distribution, structural characteristic of shape , pollen shape characteristic and hereditary variety . Through the survey of there is distributing area nowing and experiment research, the results are as follows. Combining the shape characteristic and dissecting structural research indicates: 7 kinds of Zygophyllum L.one and S.xanthoxylon Bunge have the character of fighting drought on shape and structure, which is to coordinate the environment each other. Have analyzed eighteen shapes and structural properties of 7 kinds of Zygophyllum L. S.xanthoxylon Bunge and, The analysis results show: The first three factors represent variation of 94 percent, which can nearly represent all variation .Nutrition-organ structural characters contribute the rate relatively heavy, and the pollen whose Genetic variation guard very high contribution-index is very little .RAPD results of study are as follows: 16 guide-thing at random measures get 125 RAPD marks of different molecular weight. 99 (79.2%) of which were polymorphic. The proportion of PPB diverstity location about the seven kinds of Zygophyllum L. between 43.2percnt and 68 percent . The index of Nei's gene varied degrees between 0.1693 and 0.2541.The index of Shannon's information diversity between 0.2488 and 0.3798.That shows high genetic diversity levels. The PPB,h and I of S.xanthoxylon Bunge are70.4%, 0.2570 and 0.4011 respectively, which all above the kinds of Zygophyllum L. .That shows more rich genetic diversity. Based on the result of Nei's cluster seven Zygophyllum L. plant can divide three groups in roughly.The result of study indicates the S.xanthoxylon Bunge and seven kinds of Zygophyllum L. have obvious differences on the shape. The RAPD analysis results indicate: The heredity among the S.xanthoxylon Bunge and seven kinds of Zygophyllum L. is relatively great, which lies between 0.2835-0.4151.the S.xanthoxylon Bunge is gathered in the most outer fringe in the cluster's picture of the blood reason relation, which is gathered alone. So I support the decision of the Flora of China which Separate the S.xanthoxylon Bunge from Zygophyllum L. and set up Sarcozygium Bunge belongs.