Seleção simultânea para qualidade do fruto e resistência à requeima em progênies de tomateiro

Nick, Carlos; Laurindo, Bruno Soares; Almeida, Victor de Souza; Freitas, Renata Dias de; Aguilera, Jorge González; Silva, Eduardo Chagas Ferreira da; Cruz, Cosme Damião; Silva, Derly José Henriques da

doi:10.1590/s0100-204x2013000100008

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…In addition, high values of genotypic determination coefficient were observed (Table 4). Such situation is desired, since it indicates that phenotypic expression had a major contribution from genetics (Nick et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Genotype x environment interaction on experimental hybrids of chili pepper

cabral¹,

Medeiros²,

Neves³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. In Brazil, cultivation of hybrid plants comprise near 40% of the area grown with vegetables. For Capsicum, hybrids of bell and chili peppers have already exceeded 50% and over 25% of all are commercialized seeds. This study aimed to evaluate new pepper hybrids in two environments, Cáceres, MT, and Campos dos Goytacazes, RJ, Brazil. Nine experimental hybrids of C. baccatum var. pendulum were tested and trials were performed in a randomized block design, with three replications and eight plants per plot. In each environment, plants were assessed for canopy diameter, plant height, number of fruit per plant, mean fruit mass per plant, fruit length and diameter, pulp thickness, and content of soluble solids. Seven of the eight traits have differed significantly due to environment variation. Furthermore, genotype and environment interaction was highly significant for number of fruit per plant, mean fruit mass per plant, fruit length, and fruit diameter. Choosing a hybrid to be grown in one of the studied locations must be in accordance with the sought characteristics since there is a complex interaction for some studied traits.

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Section: Resultsmentioning

confidence: 99%

Genotype x environment interaction on experimental hybrids of chili pepper

cabral¹,

Medeiros²,

Neves³

et al. 2017

Genet. Mol. Res.

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“…It is desirable that the selection regarding resistance is made within the cultivated species (Solanum lycopersicum L.) or derived from intra-specific crosses (within the lycopersicon group), so that the selection of characters of agronomic interest and fruit quality is not lost with the link drag of interspecific intersections. When the source of resistance is found in wild materials outside the species S. lycopersicon it is recommended that an adaptation be made to the germplasm (pre-breeding) (Nick et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Tomato breeding for disease resistance

Almeida

Silva

Copati

et al. 2020

MSJ

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In the genetic breeding of tomatoes, not only productivity, but also factors related to fruit quality and pest and disease management are taken into account. In this context, diseases stand out, since they are the main bottlenecks for successful cultivation. Currently, the search for more sustainable crops has demanded from producers’ alternatives to disease control to reduce the use of pesticides. Among the diseases that most reduce tomato production in Brazil, whether for table or industry, we can mention late blight, black spot, fusarium wilt, viruses, bacterial and nematode diseases. Genetic resistance, obtained by genetic breeding programs, is one of the best tools to deal with diseases to depend less on pesticides. Thus, this review aims to provide an overview of tomato breeding programs in terms of resistance to the main diseases that affect this crop.

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“…Dessa forma, a busca por recursos genéticos que possam ser usados como fonte de resistência à requeima tem sido realizada no Banco de Germoplasma de Hortaliças da Universidade Federal de Viçosa (Abreu et al, 2008;Fiorini et al, 2010;Elsayed et al, 2011;Nick et al, 2013).…”

Section: Introductionunclassified

Potencial de hibridação entre acessos de tomateiro para pré-melhoramento quanto à resistência à requeima

Laurindo

Nick

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar genitores com potencial de hibridação para o pré-melhoramento do tomateiro (Solanum lycopersicum) quanto à resistência à requeima. Foram utilizados seis acessos de tomateiro (BGH-2102, BGH-2117, BGH-2127, BGH-2130, BGH-2332 e BGH-2343 como genitores resistentes e 15 híbridos F 1 originários destes genitores. Utilizou-se o delineamento de blocos ao acaso, com três repetições. As plantas foram inoculadas com uma mistura de esporângios de Phytophthora infestans, agente etiológico da requeima, na concentração de 5x10 3 esporângios mL -1 . A área abaixo da curva de progresso da doença foi utilizada para avaliar a resistência. Realizou-se a análise dialélica, tendo-se considerado o efeito de genótipos como fixo. Estimou-se a capacidade geral e específica de combinação dos acessos. O padrão de resistência dos genitores e da maioria dos F 1 foi o mesmo que o das testemunhas resistentes. Foram observados: variabilidade genética aditiva entre os genitores, predominância de efeitos gênicos não aditivos e desvios de dominância bidirecional no controle do caráter. A frequência de alelos favoráveis e divergentes para resistência à requeima é maior nos acessos BGH-2117, BGH-2127 e BGH-2343.Termos para indexação: Phytophthora infestans, Solanum lycopersicum, capacidade combinatória, fonte de resistência. Hybridization potential among tomato accessions for pre-breeding for resistance to late blightAbstract -The objective of this work was to evaluate parents with hybridization potential for pre-breeding of tomato (Solanum lycopersicum) for resistance to late blight. Six tomato accessions (BGH-2102, BGH-2117, BGH-2127, BGH-2130, BGH-2332, and BGH-2343) were used as resistant parents and 15 F 1 hybrids originated from these parents. The design was a randomized complete block with three replicates. The plants were inoculated with a mixture of Phytophthora infestans sporangia, the etiological agent of late blight, at a concentration of 5x10 3 sporangia mL -1 . The area under the disease progress curve was used to evaluate resistance. Diallelic analysis was performed, considering the effect of genotypes as fixed. The general and specific combining ability of the accessions was estimated. The resistance pattern of the parents and of most of the F 1 was the same as that of the resistant controls. The following were observed: additive genetic variability among the parents, predominance of nonadditive gene effects, and bidirectional dominance deviations in the control of the trait. The frequency of favorable and divergent alleles for late blight resistance is higher in the BGH-2117, BGH-2127, and BGH-2343 accessions.

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Seleção simultânea para qualidade do fruto e resistência à requeima em progênies de tomateiro

Cited by 9 publications

References 12 publications

Genotype x environment interaction on experimental hybrids of chili pepper

Genotype x environment interaction on experimental hybrids of chili pepper

Tomato breeding for disease resistance

Potencial de hibridação entre acessos de tomateiro para pré-melhoramento quanto à resistência à requeima

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