Agronomic performance and biochemical properties of sweet corn populations
1991
Logrono, M.L. | Burgonio, A.B. | Rodriguez, F. (Philippines Univ., Los Banos, College, Laguna (Philippines). Inst. of Plant Breeding)
Five sweet corn populations, namely Phil. Supersweet no. 1 (Asukar), Hawaiian Supersweet no. 9 (HS no. 9) White Sweet Corn (WSC), Maize Dulce Cruza (MDC), and Batangas Sweet Corn (BSC) were evaluated for yield and other agronomic traits in College, Laguna and Pila, Batangas [Philippines]. The first four entries are classified as supersweet corn (based on shrunken and brittle genes) while the last entry (BSC) is classified as ordinary sweet corn (based on sugary gene). Ear samples were taken from College trial 20 days after pollination for biochemical analyses at 0, 24, 48, and 72 hours of room temperature storage. Among the biochemical traits measured were water soluble polysaccharides (WSP), reducing sugars, sucrose, starch and moisture content. Results revealed that BSC gave the highest yield of 7.24 tons/ha of marketable ear followed by WSC at 6.56 tons/ha. WSC exhibited the earliest maturity with a silking time of 48 days, while HS9 gave the best eating quality in terms of kernel tenderness with a rating of 1.25. Except for BSC and and WS, there was generally an increasing amount of total reducing sugars (TRS) as the ears were stored from 0-72 hours after harvest. Percent sucrose and total free sugars (TFS), however, decreased for all entries as the storage time was increased. This was accompanied by an increase in starch content as sugars were converted to starch during storage. BSC had lower sucrose and TFS content, but it contained 3-4 times more WSP than the supersweets
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