New Zealand Journal of Crop and Horticultural Science abstracts

---

Some fruit attributes of quince (Cydonia oblonga) based on genotypes during the pre-harvest period

Nurdan Tuna Gunes
Hatice Dumanoglu

Department of Horticulture
Faculty of Agriculture
Ankara University
06110 Ankara, Turkey
email: tuna@agri.ankara.edu.tr

Abstract  In this study, changes in respiration rate (RR), flesh firmness (FF), soluble solid content (SSC), titratable acidity (TA), fruit colour (FC), and the optimum harvest dates of fruits were investigated in six different quince (Cydonia oblonga) genotypes over 3 years (1996, 1997, 1998). Also, accumulated heat unit (degree-days) (AHU) above 10¼C daily mean and number of days after full bloom (DAFB) to the optimum harvest date of each genotype were also calculated. Although these parameters varied based on genotype and years, generally RR changed between 1.80 and 6.83 ml CO2 kg^-1 h^-1, FF between 56.8 and 91.4 N, SSC between 13.0% and 15.9%, TA between 0.78 and 1.61 g/100 ml, FC values between 96.2 and 110.6°, DAFB between 124 and 162 days, and AHU between 1340 and 1757 degree-days. Generally the ripening period of quince fruits for all genotypes was between 11 September and 2 October. Otherwise the fruits of ‘Yerkoy’ and ‘Ekmek’ genotypes ripened 7-10 days earlier than the others.

Keywords  colour; Cydonia oblonga; firmness; quince; respiration; soluble solids content; titratable acidity

H04049; Online publication date 5 July 2005 Received 21 May 2004; accepted 13 December 2005
New Zealand Journal of Crop and Horticultural Science, 2005, Vol. 33: 211-217
0014-0671/05/3303-0211 © The Royal Society of New Zealand 2005

PDF file of entire paper: Print-quality (67K) | screen-quality (94K)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page