Abstract

LEON-PACHECO., Rommel Igor et al. Phenotypic stability of promising eggplant genotypes (Solanum melongena L.) for the Caribbean region of Colombia. Acta Agron. [online]. 2020, vol.69, n.3, pp.188-195.  Epub Aug 31, 2021. ISSN 0120-2812.  https://doi.org/10.15446/acag.v69n3.79456.

The phenotype is the cumulative effect of the genotype and the environment, and its interaction. As the environment is highly variable between locations and seasons, and the effects of genotypes are constant, the environment turns out to be the major factor affecting the phenotype. In view of the above, the objective of this work was to identify highly productive and phenotypically stable eggplant (Solanum melongena L.) genotypes, with fruits suitable for the export and national market, based on stability analysis using the AMMI model and the superiority index (Pi) of Lin and Binns in variables associated with yield in 15 genotypes of eggplant, in three environments of the Caribbean region of Colombia. The most relevant results were: (1) The yield of first and second category fruits were highly significant for the interaction genotype by environment; (2) the materials C015, C027, C035, C036 and C049 for the first category yields and C014, C025, C032, C040 and C049 for the second category yields, were located close to the zero of PC1, so they are considered the genotypes that less contribute genotype x environment interaction, and therefore are considered the genetic materials with the most stable behavior; and (3) the genotypes that appear as the most stable according to Pi for the first category yields were C006, C026, C027, C035 and C040, and second category yields were C014, C035, C040, C042 and C049; which, for the most part, coincide with the most stable and high-yielding genotypes according to the AMMI analysis.

Keywords : AMMI model; brinjal; genotype x environment interaction; Lin and Binns; superiority index.

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