Parental selection in Portulaca umbraticola Kunth for ornamental purposes /Selecao parental de Portulaca umbraticola Kunth para fins ornamentais

Purslane (Portulaca umbraticola Kunth) is used as a food, medicinal, and ornamental plant. Its ornamental use is associated with the wide genetic variability in phenotypic traits, which is fundamental in breeding programs. The objective of this study was to select parents of P. umbraticola Kunth, ba...

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Published inRevista brasileira de engenharia agrícola e ambiental Vol. 29; no. 10; p. 1
Main Authors dos S. Pessoa, Angela M, de Freitas, Sabrina Q, de Lima, Francismaria F, Santos, Fernanda J.Q, de Aquino, Gilsivan S.M, de Sousa, Willianny K, Junior, Rui Sales, Barroso, Priscila A, da S. Ribeiro, Joao E, Negreiros, Andreia M.P, do Rego, Elizanilda R
Format Journal Article
LanguageEnglish
Published ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior 01.10.2025
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ISSN1415-4366
DOI10.1590/1807-1929/agriambi.v29n10e291158

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Abstract Purslane (Portulaca umbraticola Kunth) is used as a food, medicinal, and ornamental plant. Its ornamental use is associated with the wide genetic variability in phenotypic traits, which is fundamental in breeding programs. The objective of this study was to select parents of P. umbraticola Kunth, based on genetic divergence of ornamental purposes. Twenty-two accessions were collected in the states of Ceara, Rio Grande do Norte, and Paraiba, Brazil. The experiment was conducted in a completely randomized design, with twenty-two treatments and three replicates. Plants were evaluated 40 days after planting, at full bloom. The evaluated traits were: plant height, stem diameter, crown diameter, leaf length, leaf width, flower diameter, petal length, number of flowers per plant, chlorophyll a, and chlorophyll b, and flower color. Data were subjected to analysis of variance and Scott-Knott test (p [less than or equal to] 0.05). Heritability and the ratio between coefficient of genetic variation and coefficient of environmental variation were estimated. The genotypes were grouped by Tocher's method, and the importance of traits by Singh's method. The accessions were grouped into seven clusters, demonstrating genetic variability, with greater importance of the traits crown diameter, plant height, and number of flowers per plant. Eight phenotypic classes were found for flower color, demonstrating the potential of these accessions for use in breeding programs. Based on intergroup distance and consideringthe key traits for ornamental purposes, the accessions Ac2, Ac4, Ac6, Ac16, Ac18, and Ac19 should be selected as parents. The use of selection index should improve the choice of the parents. Key words: purslane, germplasm, genetic improvement, ornamental potential, variability Portulaca umbraticola (Purslane) e utilizada como alimento, planta medicinal e planta ornamental. Seu uso ornamental esta associado a variabilidade em caracteres fenotipicos que e fundamental em programas de melhoramento. O objetivo deste estudo foi selecionar genitores de P. umbraticola Kunth baseado na divergencia. Vinte e dois acessos foram coletados nos estados do Ceara, Rio Grande do Norte e Paraiba, Brasil. O experimento foi conduzido em delineamento inteiramente casualizado, com vinte e dois tratamentos e tres repeticoes. As plantas foram avaliadas 40 dias apos o plantio, em plena floracao. Os caracteres avaliados foram altura da planta, diametro do caule, diametro da copa, comprimento da folha, largura da folha, diametro da flor, comprimento da petala, numero de flores por planta, clorofila a e clorofila b e cor da flor. 0s dados foram submetidos a analise de variancia e teste de Scott-Knott (p [less than or equal to] 0,05). Foram estimadas a hereditariedade e a razao entre o coeficiente de variacao genetica e o coeficiente de variacao ambiental. Os genotipos foram agrupados pelo metodo de Tocher e a importancia dos caracteres pelo metodo de Singh. Os acessos formaram sete grupos e diametro da coroa, altura da planta e numero de flores por planta foram as caracteristicas com maior peso para a diversidade. Houve oito classes para coloracao das flores, demonstrando seu uso potencial em programas de melhoramento. Com base na distancia intergrupos e nas carateristicas-chave para fins ornamentais, os acessos Ac2, Ac4, Ac6, Ac16, Ac18 e Ac19 serao selecionados como parentais. A utilizacao do indice de selecao melhorara a escolha dos parentais. Palavras-chave: beldroega, germoplasma, melhoramento genetico, potencial ornamental, variabilidade
AbstractList Purslane (Portulaca umbraticola Kunth) is used as a food, medicinal, and ornamental plant. Its ornamental use is associated with the wide genetic variability in phenotypic traits, which is fundamental in breeding programs. The objective of this study was to select parents of P. umbraticola Kunth, based on genetic divergence of ornamental purposes. Twenty-two accessions were collected in the states of Ceara, Rio Grande do Norte, and Paraiba, Brazil. The experiment was conducted in a completely randomized design, with twenty-two treatments and three replicates. Plants were evaluated 40 days after planting, at full bloom. The evaluated traits were: plant height, stem diameter, crown diameter, leaf length, leaf width, flower diameter, petal length, number of flowers per plant, chlorophyll a, and chlorophyll b, and flower color. Data were subjected to analysis of variance and Scott-Knott test (p [less than or equal to] 0.05). Heritability and the ratio between coefficient of genetic variation and coefficient of environmental variation were estimated. The genotypes were grouped by Tocher's method, and the importance of traits by Singh's method. The accessions were grouped into seven clusters, demonstrating genetic variability, with greater importance of the traits crown diameter, plant height, and number of flowers per plant. Eight phenotypic classes were found for flower color, demonstrating the potential of these accessions for use in breeding programs. Based on intergroup distance and consideringthe key traits for ornamental purposes, the accessions Ac2, Ac4, Ac6, Ac16, Ac18, and Ac19 should be selected as parents. The use of selection index should improve the choice of the parents. Key words: purslane, germplasm, genetic improvement, ornamental potential, variability Portulaca umbraticola (Purslane) e utilizada como alimento, planta medicinal e planta ornamental. Seu uso ornamental esta associado a variabilidade em caracteres fenotipicos que e fundamental em programas de melhoramento. O objetivo deste estudo foi selecionar genitores de P. umbraticola Kunth baseado na divergencia. Vinte e dois acessos foram coletados nos estados do Ceara, Rio Grande do Norte e Paraiba, Brasil. O experimento foi conduzido em delineamento inteiramente casualizado, com vinte e dois tratamentos e tres repeticoes. As plantas foram avaliadas 40 dias apos o plantio, em plena floracao. Os caracteres avaliados foram altura da planta, diametro do caule, diametro da copa, comprimento da folha, largura da folha, diametro da flor, comprimento da petala, numero de flores por planta, clorofila a e clorofila b e cor da flor. 0s dados foram submetidos a analise de variancia e teste de Scott-Knott (p [less than or equal to] 0,05). Foram estimadas a hereditariedade e a razao entre o coeficiente de variacao genetica e o coeficiente de variacao ambiental. Os genotipos foram agrupados pelo metodo de Tocher e a importancia dos caracteres pelo metodo de Singh. Os acessos formaram sete grupos e diametro da coroa, altura da planta e numero de flores por planta foram as caracteristicas com maior peso para a diversidade. Houve oito classes para coloracao das flores, demonstrando seu uso potencial em programas de melhoramento. Com base na distancia intergrupos e nas carateristicas-chave para fins ornamentais, os acessos Ac2, Ac4, Ac6, Ac16, Ac18 e Ac19 serao selecionados como parentais. A utilizacao do indice de selecao melhorara a escolha dos parentais. Palavras-chave: beldroega, germoplasma, melhoramento genetico, potencial ornamental, variabilidade
Purslane (Portulaca umbraticola Kunth) is used as a food, medicinal, and ornamental plant. Its ornamental use is associated with the wide genetic variability in phenotypic traits, which is fundamental in breeding programs. The objective of this study was to select parents of P. umbraticola Kunth, based on genetic divergence of ornamental purposes. Twenty-two accessions were collected in the states of Ceara, Rio Grande do Norte, and Paraiba, Brazil. The experiment was conducted in a completely randomized design, with twenty-two treatments and three replicates. Plants were evaluated 40 days after planting, at full bloom. The evaluated traits were: plant height, stem diameter, crown diameter, leaf length, leaf width, flower diameter, petal length, number of flowers per plant, chlorophyll a, and chlorophyll b, and flower color. Data were subjected to analysis of variance and Scott-Knott test (p [less than or equal to] 0.05). Heritability and the ratio between coefficient of genetic variation and coefficient of environmental variation were estimated. The genotypes were grouped by Tocher's method, and the importance of traits by Singh's method. The accessions were grouped into seven clusters, demonstrating genetic variability, with greater importance of the traits crown diameter, plant height, and number of flowers per plant. Eight phenotypic classes were found for flower color, demonstrating the potential of these accessions for use in breeding programs. Based on intergroup distance and consideringthe key traits for ornamental purposes, the accessions Ac2, Ac4, Ac6, Ac16, Ac18, and Ac19 should be selected as parents. The use of selection index should improve the choice of the parents.
Audience Academic
Author Negreiros, Andreia M.P
da S. Ribeiro, Joao E
de Lima, Francismaria F
de Freitas, Sabrina Q
Barroso, Priscila A
do Rego, Elizanilda R
Santos, Fernanda J.Q
de Aquino, Gilsivan S.M
de Sousa, Willianny K
dos S. Pessoa, Angela M
Junior, Rui Sales
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Snippet Purslane (Portulaca umbraticola Kunth) is used as a food, medicinal, and ornamental plant. Its ornamental use is associated with the wide genetic variability...
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SubjectTerms Analysis
Chlorophyll
Flowers
Medicine, Botanic
Medicine, Herbal
Title Parental selection in Portulaca umbraticola Kunth for ornamental purposes /Selecao parental de Portulaca umbraticola Kunth para fins ornamentais
Volume 29
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