Abstract
ABSTRACT The selection of genotypes with agronomic potential associated with drought tolerance is considered of high complexity. An alternative could be the use of selection indexes that can evaluate multiple characteristics simultaneously. This study aimed to select tomato genotypes with agronomic potential and drought tolerance by selection indexes. The experiment was conducted in a randomized block design with three replications. Ten treatments were evaluated: seven genotypes F2RC3, donor genitor (Solanum pennellii), recurrent genitor (UFU-040), and cv. Santa Clara. The irrigation was suspended until the substrate reached a matric potential of ≤-25 kPa for water stress simulation during the tomato cycle at 45, 60, 80 and 100 days after sowing. The control treatment (donor genitor) and cv. Santa Clara, were resistant and susceptible to water deficit, respectively. The UFU-102-RC3#91335 genotype presented agronomic potential and satisfactory tolerance level to water deficit and presented 58.2% higher production than the recurrent genitor (UFU-040). The genotype-ideotype distance selection index was the most appropriate for the selection of tomato genotypes for agronomic potential allied to drought tolerance.
Highlights
Seleção de genótipos de tomateiro para deficiência hídrica e potencial agronômico por meio de diferentes índices de seleção
Santa Clara foram de fato resistente e suscetível ao déficit hídrico, respectivamente
In June 2014, an interspecific cross was performed between the lineage UFU040 (Solanum lycopersicum, recurrent genitor) versus wild access LA716 (Solanum pennellii, donor genitor)
Summary
Seleção de genótipos de tomateiro para deficiência hídrica e potencial agronômico por meio de diferentes índices de seleção. A seleção visando obtenção de genótipos com potencial agronômico aliado a tolerância a déficit hídrico é considerada de alta complexidade. Objetivou-se com este trabalho selecionar genótipos de tomateiro com potencial agronômico e tolerância a déficit hídrico por diferentes índices de seleção. The cost of irrigation in tomato production represents more than 10% of the total cost Climatic events such as El niño and La niña and global warming have leveraged the vulnerability of the crop cultivars, primarily due to the susceptibility to water stresses (Pereira et al, 2015). Any measure to reduce the high costs with water supply to tomato crop is important
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