International Journal on Advanced Science, Engineering and Information Technology, Vol. 9 (2019) No. 4, pages: 1378-1386, DOI:10.18517/ijaseit.9.4.9612

Dioscorea spp. Exploration at Manokwari Regency, West Papua, Indonesia

Paulus Chadikun, Amalia Tetrani Sakya, Vita Ratri Cahyani, Maria Theresia Sri Budiastuti

Abstract

Yam (Dioscorea spp)  is a useful plant. It is included among the top five tubers food crops contributing 99% of world production. These plants grow in a secondary forests in Manokwari Regency, West Papua,  but it has not been cultivated yet by farmers or local communities,  so it needs to be explored to identify its growing environment, morphological characteristics and its species variety. The Exploration was conducted in 9 districts of Manokwari Regency, West Papua which consisted of West Manokwari, South Manokwari, East Manokwari, North Manokwari, Masni, Prafi, Sidey, Tanah Rubuh, and Warmare, with a total area of 4650.32 km2. The exploration was carried out by determining randomly sampling points based on where the plants were found. Samples found were taken its photo, and collected its morphological character data and collected its dry specimens. The results found that the plant lives at a range temperature of 25.5 - 34.80C, 57.7 - 88.2% humidity range, and light intensity range at 1033 – 26200 lux. Forty accessions were obtained during the exploration comprising of 5 species i.e Dioscorea alata L., Dioscorea bulbifera L., Dioscorea hispida Dennst, Dioscorea pentaphylla L., and Dioscorea pyrifolia Kunth. The results showed that 2 accessions of Dioscorea alata L had thorny stems and leave position of 2 other accessions were alternate; 2 accessions  of Dioscorea bulbifera L. had thorny stems; and Dioscorea pentaphylla L found to have compound leaves with 3, 4, 5 and 7 leaf blade.

Keywords:

dioscorea; exploration; Manokwari; growing environment; morphological characteristics; species variety.

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