| China is the country with the most abundant wild strawberry resources,and tetraploid wild strawberry is only distributed or mostly distributed in China.Therefore,the study of identification,classification and fruit quality of tetraploid wild strawberry is an effective way to promote the innovation and utilization of these strawberry germplasm resources.In this study,84 wild strawberry resources from 24 provinces,cities and counties in China were collected,and their ploidy,pollen viability,phenological phase,morphological characteristics and fruit quality were observed.Meanwhile,the genetic diversity of tetraploid wild strawberry in China was explored.The main results are as follows:(1)By counting the chromosomes of 84 Chinese wild strawberries with the same dioecious,76 for tetraploid of strawberry resources were determined.The vitality of pollen identification found,of which 46 materials for female plant,stamens dry and internal completely or almost no pollen,30 materials for male plants,pistils short or very few,pollen germination rate over 58.29%,the highest for J8,from Changbai Mountain in Jilin province,the pollen germination rate was 81.64%.(2)The Chinese tetraploid wild strawberry phenological phase and morphological character test found that 76 wild resources contained in the east strawberries strawberry(F.orientalis),umbrella room(F.corymbosa),slender strawberries strawberry(F.gracilis),plateau(F.tibetica),southwest of strawberries(F.moupinensis)and suspected new species in Jilin strawberry(Jilin genotype),a total of 6 classes,all distributes in china.A key list of Chinese tetraploid wild strawberry was developed according to the type of stolon branch,number of leaves,plant height and growth,bearing status of stolons and gloss of leaves.(3)Morphological characters and fruit quality of Chinese tetraploid wild strawberry were measured and genetic variation analysis was carried out.The variation coefficient of plant,runner,leaf,flower,fruit traits ranged from 12.07 to 64.75%,and the shape of petals tip had the highest variation coefficient.There were some differences in fruit quality among different species,and the variation of different quality traits ranged from 16.48% to 66.73%,F.orientalis with the highest soluble solid content,total sugar content,anthocyanin content and flavonoid content,which made it as an excellent breeding resource. |
