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Paeonia peony varieties of existing species group is the group most hardy species group, but Harbin is the alpine region, Paeonia need to deal with the winter cold. To Paeonia scientific applications in cold hardiness breeding and as a resource, the subject of each biennial seedlings and Harbin has introduced three varieties of Paeonia test materials, were cold and cold hardiness Paeonia measures research. The results are as follows: 1 Paeonia seedlings in vitro and in vivo branches branches in electrolyte leakage, tissue browning index, frost index measurement have shown a significant correlation (P <0.01), the relevant index were 0.956, 0.964 and 0.985; measurement results of three methods are basically the same trend, Paeonia seedling shoots under laboratory conditions of cold tolerance at -22 ℃ ~ -24 ℃. 2 out of the 10 evaluation species Paeonia hardiness sort of 'Yao Chi nine women'> 'Panda'> 'scholar holding ink'> 'elated'> 'sea of ??ink Silver Wave'> 'Xuehai rainbow'> ' Blue Cloud '>' Black Dragon '>' dancer '>' evenly divided '. 3 to MDA, soluble sugar content, soluble protein content, proline content and SOD activity is based on the change from cold to explain the physiological mechanism of Paeonia hardiness differences between varieties, noting that the Physiological Indices and Paeonia correlation between cold hardiness, ie soluble sugar, soluble protein content and SOD activity and cold resistance Paeonia was significantly positively correlated with MDA was cold resistance Paeonia significant negative correlation, proline content and hardiness Paeonia no significant correlation. 4 AHP proof measures for different handling characteristics ornamental species Paeonia following year comprehensive evaluation. Analytical Hierarchy Process (AHP) to establish a set of suitable cold Paeonia comprehensive evaluation model, and 16 kinds of ornamental evaluation factors were analyzed, obtained its first few important indicator, according to the weight values ??in the order of the length of flowering (28.1%), the growth potential (12.0%), germination rate (11.8%), flower diameter (10.1%), color (7.1%), leaves (5.4%), litter quantity (5.1%), the amount spent (3.5%), flowers (2.4%), flowers (2.4%), pigmentation (2.4%), leaf type (2.2%), the propagation coefficient (2.2%), after flowering ornamental (2.0%), flower show degree (1.2%), plant type (1.2%). Through the model evaluation, the following year Paeonia ornamental varieties are divided into five levels: Ⅰ level (≥ 4.0): ornamental value types: Ⅱ grade (4.0-3.5): ornamental value types; Ⅲ grade (3.5- 3.0): ornamental value types; Ⅳ grade (3.0-2.5): ornamental value general types; Ⅴ level (≤ 2.5): ornamental value difference between species. Five different measures of cold cold effect merits order: buried, straws filled with leaves, straws straws wrapped in plastic and independent cold, cold Paeonia show that optimized method was buried, and the whole is better than cold independent cold. This large-scale introduction of cold cold winter Paeonia provides a reference to the methods and means.
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