Abstract: Seven Japanese strawberry varieties were used as test materials. The biological characters,photosynthetic characteristics and fruit quality of different varieties were determined. The membership function method was used to analyze the strawberry varieties most suitable for planting in Tianjin. The result showed that there were significant differences in biological characteristics,photosynthetic characteristics and fruit quality indexes among different strawberry cultivars. According to the membership function values of the net photosynthetic rate,leaf area,average fruit weight,soluble solids,soluble sugar,sugar-acid ratio and hardness,Jiaomei has strong photosynthetic capacity,sweet and sour fruit,high hardness,suitable for storage and transportation,and is most suitable for popularization and cultivation.

Key words: strawberry, variety, photosynthetic characteristics, quality