Analyze the genetic variation and drought resistance of the potato germplasm

To explore the relationship between potato (Solanum tuberosum) different genetic traits and its response to water stress, we analyzed the genetic diversity of test materials by the methods of SSR, studied the content variation of peroxidase (POD and CAT) activity and soluble protein of different potato varieties under water stresses by processing potato transplanting seedling for PEG-6000 simulated water stress and natural water stress method. The results showed that the genetic similarity coefficient (GS) at 0.700 level, 44 potato materials can be divided into five types, most breed clustered together, explaining the genetic basis of testing varieties is still relatively narrow. Through a GGE-biplot comprehensive analysis of soluble protein, POD and CAT variation, 44 selected materials were divided into 6 groups. Comparative analysis of genetic diversity analysis and physiological results found that there were no obvious consistency between them, namely the species differences in genetic traits can't react their drought resistance performance difference directly. But two stress modes with high consistency on studying the characteristics of varieties of drought resistance. This research provides the reference for further drought resistance research.