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Post-harvest carbohydrate changes and sensory quality of three sweet corn cultivars.

Olsen, J. K.; Giles, J. E.; Jordan, R. A.;

Scientia Horticulturae Year: 1990 Vol: 44 Issue: 3-4 Pages: 179-189 Ref: 23 ref.

1990

บทคัดย่อ

Post-harvest carbohydrate changes and sensory quality of three sweet corn cultivars.

In 1988, 3 commercial sweetcorn cultivars: (1) a cultivar recessive for the sugary (su) allele and bred for high sweetness and low starch (Aussie Gold 12), (2) a standard su cultivar (Rosella 425) and (3) a supersweet cultivar recessive for the shrunken-2 (sh2) allele (Sucro), were compared under postharvest conditions for carbohydrate composition and eating quality for the fresh market. Cobs were stored for up to 10 days at 1, 4, 7 or 18 deg C. The sucrose content of fresh Sucro was approximately 3 times that of the other 2 cultivars. After 10 days storage at 18 deg , percentage total sugar depletion was greater for Sucro (74%) than for Aussie Gold 12 or Rosella 425 (57 and 58%, respectively), but Sucro still contained significantly more sugars than the other cultivars after storage. Sweetness, flavour and general eating quality scores were significantly higher for Sucro than for Aussie Gold 12 and Rosella 425, both before and after storage. These scores decreased at a similar rate at 1 and 4 deg , but as temperature was increased above 4 deg , deterioration became more rapid. Number of days of acceptable quality at 1 deg were 8, 4 and >10 for Aussie Gold 12, Rosella 425 and Sucro, respectively, indicating the value of the sh2 cultivar as a fresh market product.