ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Implications of genetic variation on the marketing of fruit and vegetables.

Bowden, A.; Khanbari, O.; Wei, Y. Q.; Thompson, A. K.;

Aspects of Applied Biology Year: 1994 Issue: No. 39 Pages: 103-109 Ref: 15 ref.

1994

บทคัดย่อ

ABSTRACT :

Cultivars of a particular species vary widely in the quality of their fruits or vegetables. Variation in the processing quality of potato cultivars Record, Saturna, Hermes and Panda for crisps was studied by storing tubers at 8 or 4 deg C in 1992, and at 10 and 5 deg C in 1993. Tubers were removed after 6 months and sprouts were removed and weighed from samples which were then cut into slices and fried under standard conditions. The distribution of colour on the crisps was assessed using an Optimax computer vision system. In addition, samples were conditioned for 2 weeks at 20 deg C after removal from storage before frying at 180-190 deg C for 3.5 min. Record had characteristics which make it not entirely suitable for the processing industry. The other cultivars produced crisps with a lighter, more acceptable fry colour. In a second experiment, Cavendish bananas (Musa AAA) and Apple bananas (AA) were stored at 13 deg C (relative humidity 90%) for 28 days and subsequently ripened at 19 deg C. Ski

n colour changes were measured by comparison with a standard colour chart, where 1 = dark green and 7 = fully yellow with brown spots. Fruit firmness was measured with an Instron instrument using a 6 mm diameter probe and a crosshead speed of 10 mm/min. Deformation continued until penetration was observed from the recording curve. Yield stress data were obtained for both skins and pulp after storage at 13 deg C and on fully ripe samples. Information was also recorded on fruit total soluble solids content, respiratory activity and flavour. Cavendish bananas had highly desirable postharvest characteristics, while their eating quality was less acceptable than that of Apple bananas.