Biodiversity Science

   

The diversity of Cytospora chrysosperma from different hosts in Xinjiang

Rong Ma1, Yongxiang Yin2, Ying Zhao1, Zhidong Zhang3, Chengming Tian   

  • Received:2019-05-29 Online:2019-11-12
  • Chengming Tian

In order to clarify the diversity, phylogenetic relationship and genetic difference of Cytospora Chrysosperma from different hosts in Xinjiang. The cultural characteristics, Biolog-FF and ISSR molecular marker were used to analyze the physiological-biochemical characteristic and genetic diversity of C. chrysosperma. The results showed that 47 strains of C. chrysosperma have been divided into 15 types based on the culture characteristics. Different strains have different carbon source utilization and metabolic capacity. The amount of carbon source utilization by each strain increases with the growth time. The strain 882 utilized 28 different carbon sources for 120 h culture and the metabolic capacity of carbon sources is moderate. The strain 812-1 only utilized 10 carbon sources for 120 h and its metabolic capacity is low. Strains 740, 1074-2, 891-1, 847, 896 and 934 are able to utilize individual carbon sources. 47 strains of C. chrysosperma were divided into two clusters by cluster analysis based on genetic similarity when the genetic coefficient was 0.58. The second cluster have similar culture characteristics: white clonies, small and dense fruiting bodies. The genetic diversity of C. chrysosperma is mainly effect by its genetic structure. The influence from host species and geographical origins is not significant.

Key words: Cytospora chrysosperma, ISSR, cultural characteristics, Biolog-FF

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