Study of interaction between genetic source, harvest time and storage time in some mutant varieties of sweet sorghum to support future bioindustry development

This research aimed to find out interaction of genetic source×harvest time×storage time in 10 mutant varieties of sweet sorghum to support sorghum bioindustry. The study was carried arranged in split-split plot design with 3 replications. Main plot was variety which consists of 10 mutant varieties with 2 control varieties (Numbu and Super 1). Whereas subplot was harvest time consisted of 3 levels (75, 90 and 105 days after planting/DAP). Sub-subplot was storage times (0, 4, 8 days after harvest/DAH). Mutant varieties influenced juice volume and sugar yield. Harvest time influenced brix content and juice volume. Storage time, interaction of variety×harvest time, variety×storage time, and harvest time×storage time had significant effects on all observed traits. Interaction between variety×harvest time×storage time) affect the brix content. High brix content can be gained at harvest time of 90 DAP and with storage time of stalk at 4 DAH. There were 4 mutant varieties of sweet sorghum with high brix content, namely GMS-1 (23,05%), GMS-3 (22,88%), GMS-8 (22,75%), GMS-2 (22,62%) and GMS-6 (22,08%). Mutant variety of GMS-5 had the highest juice volume in all harvest times at 0 DAP. The mutant variety GMS-9 had stable sugar yield in all three harvest and storage times.