In order to select high quality Rhododendron liliiflorum germplasm resources which are valuable for development and utilization,the seed traits and germination characteristics of Rhododen-dron liliiflorum seeds from 7 different provenances in Guizhou Province were studied.The results showed that there were significant differences in length,width,thickness,size index and 1 000-grain weight of seeds from different sources,as well as significant differences in germination rate,germina-tion potential,germination index and vitality index.The seed size index(0.91),1 000-grain weight(0.544 g)and all germination indexes of Majiang provenance were significantly higher than those of other provenance.Seed germination ability was mainly affected by seed size index,1 000-grain weight and flattening rate,and germination indexes were significantly positively correlated with 1 000-grain weight.Seed size index had significant negative correlation with latitude,significant positive correla-tion with annual precipitation and frost-free period,and significant positive correlation with annual sunshine.The 1 000-grain weight of seed was positively correlated with average annual temperature,average annual precipitation and average annual sunshine.Seed flattening rate was positively correla-ted with latitude,negatively correlated with average annual temperature and sunshine,and negatively correlated with frost-free period.Latitude,average annual precipitation,average annual sunshine,av-erage annual temperature and frost-free period can be used as the basis for the selection of high-quality seed sources of Rhododendron liliiflorum in Guizhou province.The results of cluster analysis showed that the seed characters and germination characteristics of Majiang provenances were the best among the 7 provenances.The provenances of Majiang can be used as high quality provenances of Rhododen-dron liliiflorum.
维普
万方数据
