Physiochemical evaluation of resistant banana fruits

Banana's national production is committed by the performance of the black sigatoka (Mycosphaerella fijiensis Morelet) for the whole country, and particularly in Amapá, Brazil. This work aimed at evaluating cultivars highly resistant to the disease, Caipira, Thap Maeo, PV03-44, FHIA-01, FHIA-18, and to susceptible cultivar FHIA-21, with relationship to the physical and chemical characteristics of the fruits, in the period of 2003-2004, under the edafoclimatic conditions of the state of Amapá. The medium moisture content of banana fruits was 74,61%, and FHIA-18 (75,91%) differed statistically of Thap Maeo (74,01%), FHIA-21 (73,96%) and PV03-44 (73,68%). In relation to the dry matter of fruits (25,39%), FHIA-18 (24,09%) presented values significantly smaller than PV03-44 (26,32%), FHIA-21 (26,04%) and Thap Maeo (25,99%). It was observed that the pulps of the cultivars presented acid nature (pH 4,8), and PV03-44 (5,1) differed statistically of FHIA-18 (4,6). In the soluble solids content (average of 21,51ºBrix), the cultivar FHIA-21 (24,82ºBrix) differed significantly of the others. The ratio SS/TA (average of 82,90) of the cultivar FHIA-21 (99,23) differed statistically of Thap Maeo (78,95), FHIA-18 and PV03-44 (77,48). In relation to the titratable acidity (0,27% malic acid) and to lipids content (0,17%), there was not difference among the cultivars. Regarding to the protein content of the resistant materials to the black sigatoka, the average of the experiment was of 4,59%, and the genotype PV03-44 (4,08%) differed statistically of the others. The resistant cultivars presented positive aspects of quality, mainly in the ratio TSS/TTA, one of the main parameters of qualitative attribute of fruit flavor.

banana; physicochemical; composition

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