Identification of a local variety of ‘uwi’ (Dioscorea alata Linn.) in four agro-climate regions of East-West Java - Indonesia based on tuber character

Abstract

Indonesia is very well known for its genetic diversity of potential tubers plants for alternative and functional food sources. ‘Uwi’ (Dioscorea alata Linn.) as one of the tuber’s plants needs to get attention, so there is no genetic erosion or even extinction. Seeing the high diversity of agro-climates and the high genetic diversity of ‘uwi’ plants, it is necessary to mapping and identify the suitability of the ‘uwi’ plant in line with its agro-climate character. The study aims to identify specific local varieties and the distribution of other types with broad adaptability. The analysis using the similarity interval function on the NTSys program showed that of the 47 accessions tested at 70 % similarity level there were four groups scattered in four different agro-climates. The first group enters climate types C2, C3 and B2; the second group enters C2; the third group enters C2 and C3; all fourth enter C2, C3, D3. Found three specific accession only in type C2 and C3 and most of the ‘uwi’ plants have distribution in all types of climates, showing broad adaptability and potential to be developed without high technology. The colours, shapes, flavours, and feathers of the tubers are the main differentiators in existing diversity.

PHYSICOCHEMICAL PROPERTIES OF FLOUR AND STARCH OF PURPLE WATER YAM (Dioscorea alata) TUBER AND THE DIFFERENCE ON SENSORY ACCEPTANCE OF THE COOKIES PRODUCED

“…Varieties of water yam known in Indonesia are purple water yam (Dioscorea alata L. var. Purpurea (Roxb) M. Pouch), yellow water yam (Dioscorea alata L.), and white water yam (Rosida, Purnawati, & Susiloningsih, 2018, Wuryantoro, Puspitawati, Fitriyani, & Soni, 2019.…”