Selection in segregating populations of ornamental pepper plants (Capsicum annuum L.) using multidimensional scaling

Costa, Maria do Perpetuo Socorro Damasceno; Rêgo, Elizanilda Ramalho do; Barroso, Priscila Alves; Silva, Anderson Rodrigo da; Rêgo, Maílson Monteiro do

doi:10.1590/0034-737x202067060007

Cited by 1 publication

(3 citation statements)

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“…The plants in the F 5 population may still be undergoing segregation, i.e., they have not yet achieved a high allele fixation, which is related to the inbreeding level in populations. Additionally, 732 genotypes were evaluated in the present study, which is a significantly large number when compared to other studies evaluating segregating populations of ornamental peppers (Costa et al, 2020;Carvalho et al, 2021). Therefore, the population size and the diversity among genotypes may have affected the results found for the evaluated genetic parameters.…”

Section: Quantitative Descriptorsmentioning

confidence: 99%

“…The diversity of the genus and the market interest in ornamental varieties are factors that have stimulated and intensified research on pepper plants and the conduction of breeding programs focussed on obtaining new pepper cultivars (Costa et al, 2020;. The species Capsicum annuum is one of the most used for potted planting for ornamental purposes due to its small size and large variability of fruit shapes and colours (Fingere et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Morphological characterisation of pepper accessions with ornamental potential is widely used in research due to the importance of visual attributes in this type of material (Costa et al, 2020;Cunha et al, 2020;Guimarães, 2020;Morais et al, 2020). However, in general, these qualitative traits are considered individually in breeding programs.…”

Section: Introductionmentioning

confidence: 99%

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Selection of ideal genotypes in peppers with ornamental potential

Custódio,

Pimenta,

de Souza Gomes

et al. 2023

Folia Horticulturae

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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.

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Section: Quantitative Descriptorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%