Sweet sorghum hybrid parents improvement for bioethanol production for sustainable energy security in the Philippines
2009
Salazar,A.M. | Tarun, J.A.M. | Pascual, C.B. | Caasi-Lit, M. | Santos, P.J.A., Philippines Univ. Los Baños, College, Laguna (Philippines). Inst. of Plant Breeding. Crop Science Cluster | Reaño, C.E., Phillipine Univ., Los Baños, College, Laguna (Philippines). Inst. of Statistics | Reddy, B.V.S. | Kumar, A.A., International Crops Research Inst. for the Semi-arid Tropics, Patancheru (India)
The phenotypic characteristics of nineteen candidate sweet sorghum hybrids were evaluated during the 2008 dry and wet season in UPLB and Tayug, Pangasinan [Philippines]. Plant height, stalk diameter, stalk length, panicle length, 100-seed weight, grain yield, bagasse yield, juice volume and weight, brix total sugar, and sugar yield were the biomass and sugar yield components analyzed. In addition, seedling vigor, standing ability, plant uniformity, head type, grain color, insect and disease rating were the other traits studied. Better consistency and precision in results of the field trials was noted basically for biomass and juice yield. Sugar content was very variable across entries and test environments. Biomass and juice yield, major components of sugar yield, showed a very strong correlation to sugar content. Thus, selection was reliably made in terms of juice yield leading to the identification of six hybrids being the most promising ones: ICSA502 x ICSV700, ICSV511 x ICSV700, ICSA702 x SSV74, ICSA502 x SPV422, ICSA502 x SSV74 and ICSA675 x ICS700. Grain productivity and sugar content of these hybrids in Tayug were superior to that of UPLB. The positive effect of presently identified good sorghum lines which were made as restorers in these hybrids e.g. ICSV700 and SPV422 suggests the importance of additive gene action in complementing the dominant gene action apparent in the vigor of these hybrids.
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