Abstract
ABSTRACT Crispleaf lettuce, which is a light green leaf lettuce, is the most popular leafy vegetable in Brazil. However, it is relevant to evaluate agronomic traits of lettuce with more intense green color leaves considering the increase in consumer demand. Thus, the aim of this study was to evaluate lettuce genotypes about the different chlorophyll contents and correlate with green mass production in a hydroponic system. Ten lettuce inbred lines and two cultivars (Vanda and Luiza) were evaluated for agronomic traits and chlorophyll contents in leaves. A randomized block design with four replicates was used. The chlorophyll content was variable among the genotypes, ranging from 43.3 (Luiza) to 20.8 (Vanda). The genotypes with the highest chlorophyll content were those who showed the lowest mass production, but no correlations were found between these variables, though.
Highlights
A alface do tipo crespa, com folhas de coloração verde clara, é a hortaliça folhosa preferida no Brasil
Dez linhagens de alface e duas cultivares (Vanda e Luiza) foram avaliadas para características agronômicas e teores de clorofila nas folhas, em delineamento de blocos ao acaso com quatro repetições
Researches aiming at a Morphological evaluation of lettuce genotypes grown under hydroponic system greener-colored leaf lettuce have been the target of vegetable breeding program at UFSCar
Summary
A alface do tipo crespa, com folhas de coloração verde clara, é a hortaliça folhosa preferida no Brasil. Lettuce is grown intensively and under different productive systems, being the hydroponic system the one which stands out This system has been increasing in the last decades and promotes production all year long, favors management, maximizes the use of inputs, allows a partial control of environmental adverse conditions, and it is more convenient for consumers as it provides greater cleanliness in the finished product. Researches aiming at a Morphological evaluation of lettuce genotypes grown under hydroponic system greener-colored leaf lettuce have been the target of vegetable breeding program at UFSCar. Researchers have been searching for a cultivar which shows a more intense green color (higher chlorophyll content) and shiny leaves (Sala, 2011; Sala & Costa, 2014)
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