Abstract:

To discuss the distribution and diversity of Prinsepia utilis Royle resources, we investigated and evaluated 121 samples of Prinsepia utilis Royle resources collected from 12 townships and Jade Dragon Snow Mountain Scenic Area. The results show that: Prinsepia utilis Royle mainly distributes at the altitude from 2000-3200 m, and could be found above 1800 m in Lijiang; the flowering period is from November to March of the next year, and the fruiting period is from April to July; the Prinsepia utilis Royle has the characteristics of cold tolerance, drought tolerance and could adapt to poor nutrients environment; at present, the area of wild Prinsepia utilis Royle in Lijiang is 3400 hm ², and the area of artificial cultivation is 6800 hm ²; there are significant differences in phenological period, seed size and 100-seed weight among different altitudes and regions. The analysis of seed traits show that: there are abundant diversity of phenotypic traits in Lijiang; the lengths of the largest and smallest seeds differ about two times in vertical, horizontal and lateral diameters; the heaviest single seed weight is 0.408 g, the lightest is 0.056 g, and the difference is 7.3 times; the 100-grain weight of 103 resources ranges from 10 to 20 g; the seed plumpness ranges from 30% to 100%, among them, the seed plumpness of 5 resources is 100%. The results of this survey provide a reference for genetic diversity research and breeding of Prinsepia utilis Royle .

Key words: Prinsepia utilis Royle, Resources Investigation, Botanical Characteristics, Character, Diversity, Lijiang