At-harvest fruit quality attributes of New Zealand feijoa cultivars.
Wiryawan I., Hertog M.L.A.T.M., Trejo Araya X.I., Maguire K.M., East A.R., Mawson A.J.
5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.92
2004
บทคัดย่อ
At-harvest fruit quality attributes of New Zealand feijoa cultivars.
At-harvest fruit quality attributes of four feijoa (Feijoa sellowiana) cultivars (Unique, Triumph, Apollo and Mammoth) were measured during the 2002 season.Fruit were supplied ungraded and unsorted at optimum maturity as determined by ‘touch picking’ and were sourced from four production regions within New Zealand.The measured quality attributes were grouped into four categories: (1) size and shape – characterised by mass, length; diameter ratio and surface area; (2) storage potential -characterised by skin water vapour permeance (WVP) and respiration rate: (3) taste and texture – characterised by firmness, density, brix (total soluble solids), dry matter (DM) content, titratable acidity and sensor analysis; and (4) fruit maturity – characterised by relationships between the parameters above and image analysis of sectioned fruit.The incidence of defects or disorders was also noted.Large variations between individual fruit and fruit batches were observed for most quality attributes.The ratio of the translucent part of the fruit section to overall cross-sectional area appeared to be a potential indicator of maturity.Significant (P<0.05) differences in average WVP, titratable acidity, and °brix to acid ratio also showed potential to be linked in building an overall maturity index.A linear relationship observed between fruit density and DM content may have utility for segregating fruit based on taste.