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Please use this identifier to cite or link to this item: http://hdl.handle.net/2174/258

Title: Improving eating quality and carotenoid content of squash
Authors: Noseworthy, J.
Loy, B.
Pitrat M. (ed)
Issue Date: May-2008
Publisher: INRA. Centre de Recherche d'Avignon. Unité Génétique et Amélioration des Fruits et Légumes, Montfavet (France)
Citation: Noseworthy J., Loy B. 2008. Improving eating quality and carotenoid content of squash. Pitrat M. (ed): Cucurbitaceae 2008, Proceedings of the IXth EUCARPIA meeting on genetics and breeding of Cucurbitaceae, Avignon (France), May 21-24th, 2008, pp. 521-528.
Abstract: The fruit of most cultigens of Cucurbita maxima and C. moschata squash are high in carotenoids, especially B-carotene and lutein, both of which are important nutritionally. However, there have been no systematic studies to quantify the amount and types of carotenoids in fruit tissues of breeding germplasm and popular cultivars. In the summer of 2007, seven inbred lines of C. maxima and two op cultivars and five inbred lines of C. moschata were grown in replicated plots at research farms in Durham and Madbury, New Hampshire (USA). Data were recorded at harvest and after 30 and 60 days of storage at 15oC on % mesocarp dry weight (DW) and soluble solids (SS), both major attributes for determining acceptable eating quality. A visual estimation of carotenoid content was made using a Roche egg yolk color fan, with color hues numbered one (light yellow) to 15 (dark orange). At harvest, 49 to 57 days after pollination (DAP), mean mesocarp DW varied from 25.5 to 37 % and SS from 9.3 to 10.8 % among the seven C. maxima breeding lines. After storage for 30 d, four of the seven lines had SS levels above 11 %, deemed acceptable for good eating quality. In five lines with green rind, Roche color fan carotenoid values varied from 7 to 9 (medium yellow), while two lines with orange rind showed yellow-orange hues (11 to 12). After 30 d of storage all lines showed color values of 11 to 11.5, and color remained fairly stable up to 60 d of storage. In C. moschata cultigens, mean DW at harvest ranged between 20 and 24.3 % for all but one cultigen having low dry matter (16.8 %). Average SS was low, 7.0 to 8.7 % among all cultigens. Even after 60 d of storage, SS values were only above 11 % for three of the seven cultigens. At harvest Roche color values were 9 or lower for all but one cultigen. For most cultigens, color values increased progressively during 30 and 60 d of storage, and after 60 days all cultigens displayed a color value of 11 or greater.
URI: http://hdl.handle.net/2174/258
ISBN: 978-2-7380-1251-7
Appears in Collections:Poster session

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