Selection of ideal genotypes in peppers with ornamental potential

IF 2.2 4区农林科学 Q2 HORTICULTURE

Folia Horticulturae Pub Date : 2023-12-23 DOI:10.2478/fhort-2023-0033

Gabriela Cristina Alves Custódio, S. Pimenta, Fátima de Souza Gomes, N. S. Silva, B. Rodrigues, Fabrícia Cardoso Oliveira, Nelson de Abreu Delvaux Júnior, Marlon Cristian Toledo Pereira

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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.

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选择具有观赏潜力的辣椒理想基因型

摘要观赏性辣椒在国内和国际市场上都具有重要的经济意义；然而，巴西很少种植这种用途的栽培品种。本研究的目的是根据高遗传率的定量和定性变量，选育具有观赏潜力的辣椒部分近交系（PIL）。研究采用单种子后裔法，连续 4 年进行了 6 代育种。最后一个阶段（VI）是对 F5 代植株进行选育。考虑了定性（LD）和定量（QD）描述因子，并确定了理想基因型。统计分析包括估算变异成分和遗传参数以及预测遗传值，对 QD 采用 REML/BLUP 方法，但对开花周期（CF）和成熟周期（CM）进行定性分析。因此，CF 和 CM 是通过连续变量在等级区间内的频率分布进行分析的。描述性统计用于评估 LD。结果表明，残差值超过了遗传值，导致 QD 遗传率较低，因此在 PIL 选择中没有考虑它们。关于 LD，在所有评估的描述因子中，群体基因型之间都存在遗传变异。通过基于理想基因型的筛选，选出了 82 个具有较高观赏价值的 LD PIL，它们与市场上已有的材料有所不同。所选基因型将用于培育后代，直至等位基因固定，重点用于随后选择新的观赏辣椒栽培品种的候选品系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Folia Horticulturae Agricultural and Biological Sciences-Horticulture

CiteScore

3.40

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： Folia Horticulturae is an international, scientific journal published in English. It covers a broad research spectrum of aspects related to horticultural science that are of interest to a wide scientific community and have an impact on progress in both basic and applied research carried out with the use of horticultural crops and their products. The journal’s aim is to disseminate recent findings and serve as a forum for presenting views as well as for discussing important problems and prospects of modern horticulture, particularly in relation to sustainable production of high yield and quality of horticultural products, including their impact on human health.