Genetic Diversity Analysis and Primary Core Collection Construction in Yam (Dioscorea opposita Thunb.) by ISSR Marker Determination of allantoin in dried rhizoma of Dioscorea opposita by capillary electrophoresis Cryopreservation Technique of Dioscorea opposita Thunb. Germplasm Resources by Vitrification Development analysis of Dioscoreae Rhizoma in perspective of invention patent n vitro Propagation of Common Yam (Dioscorea opposita) Cryopreservation technique of Dioscorea opposita germplasm by vitrification Impact factors in in vitro induction of microtubers from Dioscorea opposita