Estudo dialélico de componentes de rendimento e constituintes químicos do óleo essencial de manjericão (Ocimum basilicum L.)

Abstract

The aim of this work was to estimate the General and Specific Combining Ability of basil, analyzing yield components and the main chemical compounds of the essential oil. The experiment was conducted at the Research Farm "Campus Rural da UFS", located in the São Cristóvão county, Sergipe. Four cultivars with different chemical compositions were chosen to realize diallel crosses. The F1 seeds and the parents were planted in field using a complete randomized block design, with three replications. The data were submitted to the diallel analysis of Griffing model 2 and the means were grouped using the Scott-Knott test (p ≤ 0.05). The following characteristics were evaluated: plant height, crown diameter, length and width of leaves, dry weight of leaves, essential oil content and yield, and the content of the main chemical compounds. The analysis of variance for the combining ability showed that the General Combining Ability (GCA) effects presented significant differences and that the Special Combining Ability (SCA) effects of the crosses were significant, except for the length and width of leaves. For almost all characters both additive and non-additive effects influenced the performance of hybrids.