ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Development of maturity indices for the 'Fuji' apple cultivar in relation to watercore incidence.

Watkins, C. B.; Brookfield, P. L.; Harker, F. R.;

Acta Horticulturae Year: 1993 Issue: No. 326 Pages: 267-276 Ref: 6 ref.

1993

บทคัดย่อ

Several problems associated with the commercial development of Fuji apple fruits have been recognized, including poor blush levels and difficulties in gaining acceptance of a cultivar for which water core is a normal occurrence. A 2-year study was carried out investigating blush type and background colour in relation to fruit maturity and quality in Fuji fruits. At harvest, fruits were classified into 9 categories based on blush and assessed for maturity and quality. Internal ethylene concentrations and starch hydrolysis were determined and background colour was measured. Flesh firmness was assessed and % SS determined in the juice and presence of water core was assessed. Background colour was a better indicator of harvest maturity than flesh firmness, starch pattern index or % SS. Internal ethylene concentrations remained low during the harvest period. Blush type, i.e. dull vs. bright, or brown vs. red, was not associated with fruit maturity. Water core incidence and intensity were both associated with background colour and provide an additional maturity index for incorporation into harvest management schemes. Water core incidence and intensity declined during storage, but no disorders subsequently appeared. The better quality Fuji fruits for current market requirements with optimum background colour and blush were more likely to have water core at harvest.