Selection of ideal genotypes in peppers with ornamental potential

Author:

Custódio Gabriela Cristina Alves1ORCID,Pimenta Samy1ORCID,de Souza Gomes Fátima1ORCID,Silva Nadiany S.1,Rodrigues Bruno Rafael Alves1ORCID,Oliveira Fabrícia Cardoso1,Júnior Nelson de Abreu Delvaux1ORCID,Pereira Marlon Cristian Toledo1ORCID

Affiliation:

1. Department of Agricultural Sciences, Universidade Estadual de Montes Claros , Av. Reinaldo Viana, n . , Morada do Sol, Janaúba , Minas Gerais , Brazil

Abstract

ABSTRACT Ornamental peppers have a significant economic importance in the national and international markets; however, few cultivars intended for this purpose are grown in Brazil. The objective of this study was to select partially inbred lines (PIL) of peppers with ornamental potential, based on quantitative and qualitative variables with high heritability. The study was conducted over six generations for 4 consecutive years, using the single seed descent method. The last phase (VI) consisted of growing plants of the F5 generation for selection. Qualitative (LD) and quantitative (QD) descriptors were considered and the ideal genotypes were defined. The statistical analyses consisted of estimating variance components and genetic parameters and predicting genetic values, using REML/BLUP for QD, except for cycle to flowering (CF) and cycle to maturation (CM), which were analysed qualitatively. Therefore, CF and CM were analysed through frequency distribution of continuous variables within class intervals. Descriptive statistics were used to evaluate LD. The results showed that residual values exceeded genetic values, resulting in low heritability for QD, and therefore, they were not considered for PIL selection. Regarding LD, genetic variability was found among the population genotypes for all evaluated descriptors. The selection based on ideal genotypes enabled the selection of 82 PIL with LD of high ornamental value, which differ from the materials already available on the market. The selected genotypes will be used for developing future generations until allele fixation, focussed on subsequent selection of candidate lines for new ornamental pepper cultivars.

Publisher

Walter de Gruyter GmbH

Subject

Horticulture

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