Discovery of natural triploid variations of Dioscorea zingiberensis and its evaluation of main economic qualities / 中草药

ABSTRACT

Objective The main economic qualities of natural triploid were evaluated and the result laid a foundation to culture new triploid variety of Dioscorea zingiberensis. Methods The ploidy level of series of D. zingiberensis from some areas of Yunnan Province were identified and the qualities of outputs per plantlet,propagation ratio,and diosgenin content etc. were measured. Results Five natural triploids were found and the qualities of the triploids all displayed diversity,output per plantlet 1 090.00—628.57 g,propagation ratio (ploidy) 72.43—29.43,dry substance ratio 36.95%—24.06%,and diosgenin content 4.40%—1.50%. The outputs of series 1 and series 3 exceed 1 000 g,the diosgenin content of series 2 reached to 4.40%,and series 3 displayed excellent quality of outputs per plantlet,propagation ratio,and diosgenin content. The synthetical index is maximum. Conclusion The series comprising good quality are obtained by the discovery of triploid and evaluation of qualities. The triploid variety is to be created with judgment and selection of progeny.