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| Author(s): |
Valéria Aparecida Modolo
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Piracicaba. |
| Institution: | Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) |
| Defense date: | 2002-09-06 |
| Examining board members: |
Cyro Paulino da Costa;
Rumy Goto;
Arlete Marchi Tavares de Melo;
Keigo Minami;
Joao Tessarioli Neto
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| Advisor: | Cyro Paulino da Costa |
| Abstract | |
Paulista Gherkin is a new gherkin type derived from Cucumis anguria x Cucumis longipes. After mass selection cycles intercalated with inbreeding cycles, lines were obtained that differ from the common types by their greater fruit size, spine abscence and non-lobular shaped leaves, similar to cucumber ones. In three experiments, Paulista gherkin lines and hybrids were evaluated for their yield and fruit production in three production systems: a) under polyethylene mulching and fertigation crop system; b) trellised and pruned plants grown in pots with substrate under high plastic tunnel; c) under the trellised net crop system. In the first experiment, ten lines of Paulista Gherkin and one type of Common Gherkin were evaluated. Paulista Gherkin fruits were, in average, 66 to 91% heavier than the Common Gherkin ones. Total fruit weight, of two gherkin types did not differ. Polyethylene-covered bed and drip fertigation use promoted an estimate yield of 51,89 t.ha -1 . In the second experiment, three Paulista Gherkin lines and Common Gherkin were cultivated in pots with substrate, under high plastic tunnel and they were trellised and pruned. Paulista Gherkin fruits were, in average, 62 to 84% heavier than the Common Gherkin ones. Paulista Gherkin line number 2 was productive as the Common type, considering the total fruits weight. However, its average fruit weight was 75% higher. Gherkin plants showed to be inadequate for to be conducted as suggested for the greenhouse cucumber crop protocol. In the third experiment, four lines and six single hybrids performance were evaluated for their yield and fruit production under trellised net crop system. Hybrids and lines were similar for yield and fruit quality. The trellised net crop system showed to be suitable to support Paulista Gherkin plants. Fruit concentration occurred in the secondary and tertiary lateral branch and plants was hold by tendrils on the net. Trellised gherkin in net mate harvest easier and enhance fruit quality. (AU) | |