盾叶薯蓣三倍体自然变异类型的发现及其主要经济性状评价  

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

作　　者：董志渊[1] 郭华春[1] 

机构地区：[1]云南农业大学农学与生物技术学院薯类作物研究所,云南昆明650201

出　　处：《中草药》2008年第9期1397-1399,共3页Chinese Traditional and Herbal Drugs

基　　金：云南省科技厅项目(2002ZY-2)

摘　　要：目的对盾叶薯蓣三倍体自然变异类型主要经济性状进行评价,为盾叶薯蓣三倍体新品系选育奠定基础。方法对云南各地区收集盾叶薯蓣进行倍性鉴定。对鉴定获得的三倍体株系的单株产量、增殖率、薯蓣皂苷元的量等经济性状进行评价。结果在收集的盾叶薯蓣资源中发现5个三倍体;盾叶薯蓣三倍体株系间性状均表现较大差异,单株产量1090.00～628.57g,增殖率(倍)72.43～29.43,干物质质量分数36.95%～24.06%,薯蓣皂苷元质量分数4.40%～1.50%,株系1和株系3产量超过1000g,株系2薯蓣皂苷元质量分数达到4.40%,株系3在单株产量、增殖率、薯蓣皂苷元的量等性状均表现优异,综合指标数值最高。结论通过盾叶薯蓣三倍体自然变异类型发现和株系性状评价,获得表现优良的三倍体株系,通过后代进一步评价有望选育出盾叶薯蓣三倍体新品系。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.

关 键 词：盾叶薯蓣 三倍体 经济性状 

分 类 号：R282.7[医药卫生—中药学]