TUBER YIELD AND QUALITY OF NINE GENOTYPES YAM BEAN (PACHYRHIZUS SPP.) DUE TO SINK-REPRODUCTIVE PRUNING
Published in Scientific Papers. Series B. Horticulture., Vol. LVII
Written by Wieny H. RIZKY, Sofiya HASANI, Agung KARUNIAWAN
Yam bean tuber starch extract has been widely used for traditional cosmetics material in Indonesia. This experiment was aimed to acquire yam bean tuber with high yield and starch content. Materials used were 9 yam bean genotypes collection of Agung Karuniawan (Plant Breeding Laboratory, Universitas Padjadjaran ) consisted of three genotypes of P. erosus, one genotype of P. ahipa, two genotypes of P. erosus intraspecific crossing and three genotypes resulted from interspecific crossing between P. erosus and P. ahipa. The field trial was conducted at experimental field of Faculty of Agriculture, Universitas Padjadjaran Jatinangor from August 2009 until March 2010. The experiment was arranged in split plot design repeated twice. The main plot consisted of two treatments namely without sink-reproductive pruning and with sink-reproductive pruning. The main plot was divided into nine subplots based on genotypes. Pruning and genotype independently affected tuber fresh weight. The heaviest tuber produced by P. erosus B-1 / EC 033. Genotypes affected on tuber dry matter and tuber starch content. The highest dry matter was contained in interspesific crossing between P. erosus x. P. ahipa EC 550 x AC 208-72h. The highest tuber starch content was resulted by P. ahipa AC 216- 139d. Sink-reproductive pruning and genotype interacted in tuber dry matter trait.