Herança de acilaçúcares em genótipos de tomateiro provenientes de cruzamento interespecífico

Gonçalves, Luciano Donizete; Maluf, Wilson Roberto; Cardoso, María das Graças; Gomes, Luíz Antônio Augusto; Nascimento, Ildon Rodrigues do

doi:10.1590/s0100-204x2007000500013

Cited by 27 publications

(35 citation statements)

References 21 publications

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“…Vendramim et al (2009) related that oviposition of B. tabaci biotype B was concentrated near to non glandular trichomes. On the other hand, Gonçalves et al (2007) verified that acylsugars levels were correlated with neither glandular nor non-glandular trichome densities.…”

Section: Resultsmentioning

confidence: 91%

Resistance of tomato genotypes to the silverleaf whitefly mediated by acylsugars

Resende

Maluf²,

Cardoso³

et al. 2009

Hortic. Bras.

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Acylsugars in the leaflets of the wild accession LA-716 (Lycopersicon pennellii) gives resistance to Bemisia spp., which causes expressive losses to the tomato crop. The goal of this work was to evaluate the resistance to the silverleaf whitefly (Bemisia tabaci biotype B) of previously selected genotypes, based on the level of acylsugars in the leaflets. F 2 BC 1 plants {F 2 [Lycopersicon esculentum TOM 584 x (L. esculentum TOM 584 x L. pennellii LA-716)]} were selected for extreme contents of acylsugars: BPX-370B pl#30-275, BPX-370B pl#79-278, BPX-370B pl#30-380, BPX-370B pl#25-271 (high contents), BPX-370B pl#30-02, BPX-370B pl#30-142 (low contents). These genotypes, along with the parents TOM 584 and LA-716, were submitted to a silverleaf whitefly infestation. Oviposition and nymph development were evaluated. The oviposition on the genotypes BPX-370B pl#30-275 and BPX-370B pl#30-380 was significantly lower to that which occurred on the genotype TOM 584 and in the other genotypes of the F 2 RC 1 generation. The four genotypes selected for high acylsugar contents presented the lowest number of nymphs, except to LA-716. Although the number of eggs in the BPX-370B pl#25-271 and BPX-370B pl#79-278 genotypes (high contents) was elevated, the number of nymphs was reduced, similarly to the other high-acylsugar genotypes, probably due to antibioses effect. Keywords:Bemisia tabaci biotype B, Lycopersicon esculentum, Lycopersicon pennellii, alelochemicals, plant breeding, host plant resistance. RESUMO Resistência de genótipos de tomateiro a Bemisia tabaci biótipo B, mediada por acilaçúcaresAcilaçúcares presentes nos folíolos do acesso selvagem 'LA-716' (Lycopersicon pennellii) conferem resistência a moscas-brancas (Bemisia spp.), causadoras de danos expressivos à cultura do tomate. O objetivo do trabalho foi avaliar a resistência de genótipos de tomateiro à mosca-branca Bemisia tabaci biótipo B, com base nos teores de acilaçúcares nos folíolos. Foram selecionadas plantaspennellii 'LA-716')]} para teores extremos de acilaçúcares: BPX-370B pl#30-275, BPX-370B pl#79-278, BPX-370B pl#30-380, BPX-370B pl#25-271 (altos teores), BPX-370B pl#30-02, BPX-370B pl#30-142 (baixos teores). Esses genótipos, juntamente com os parentais TOM 584 e LA-716, foram submetidos à infestação da mosca-branca. Avaliaram-se a oviposição e o desenvolvimento de ninfas. A oviposição nos genótipos BPX-370B pl#30-275 e BPX-370B pl#30-380 foi significativamente inferior à ocorrida em 'TOM-584' e nos demais genótipos da população F 2 RC 1 . Os quatro genótipos selecionados para alto teor de acilaçúcares apresentaram número de ninfas significativamente inferior aos demais, exceto ao acesso LA-716. Embora o número de ovos nos genótipos BPX-370B pl#25-271 e BPX-370B pl#79-278 (alto teor de acilaçúcares) tenha sido elevado, o número de ninfas foi reduzido, indicando que, mesmo havendo a oviposição sobre os folíolos, provavelmente os acilaçúcares exerceram efeito adverso ao desenvolvimento do inseto. Palavras-chave:

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Section: Resultsmentioning

confidence: 91%

Resistance of tomato genotypes to the silverleaf whitefly mediated by acylsugars

Resende

Maluf²,

Cardoso³

et al. 2009

Hortic. Bras.

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“…In order to identify the existence of major genes and polygenes with additive effects and non-additive for all traits we used the maximum likelihood method by the statistical program Monogen v. 0.1 (Silva, 2003;Gonçalves et al, 2007).…”

Section: Methodsmentioning

confidence: 99%

Determining the inheritance of agronomic traits in chili pepper

et al. 2016

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The Capsicum genus is widely studied in many countries but most of research focuses on C. annuum. Although its importance as potential genetic resource for breeding to disease resistance and fruit quality, studies on genetics and breeding in C. baccatum var. pendulum are still scarce and it still remains as an underexploited crop. This paper aimed to study the inheritance of agronomic characteristics, to estimate the genetic parameters for seven agronomic traits in C. baccatum var. pendulum, using generation mean analysis and to verify the existence of major genes and polygenes with additive and non-additive effects, using the method of maximum likelihood with the aid of Monogen software. The agronomic traits evaluated were: number of fruits per plant (NFP); average fruit mass per plant (AFM); fruit length (FRL); fruit diameter (FRD); fruit pulp thickness (FPT); soluble solids content (SSC) and fruit dry mass (FDM). There was a significant difference among generations (P1, P2, F1, F2, BC1 and BC2) for all traits evaluated. Narrow sense heritability estimates ranged from 45% for NFP to 75% for FRD. By estimating the average degree of dominance (ADD), we found that partial dominance is the gene action involved in the genetic control for FRL and FRD, while additive effect was observed for NFP, FPT and SSC, complete dominance for FDM and overdominance for AFM. The additive-dominant model was sufficient to explain the results obtained for all evaluated traits. Maximum likelihood method identified the existence of polygenes with additive and dominance effects in SSC, FPT and FDM. Major gene effect was identified for FRL and NFP characteristics. The results indicated the complexity of the inheritance of these traits with the presence of major gene involved.

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“…Maluf et al, 2010;Maciel et al, 2011) that the acyl sugars from 'LA716' (S. pennellii) are the main provider of pest resistance when found in high content in the leaflets and that indirect selection for high acyl sugar content was satisfactory for obtaining tomato genotypes with pest resistance. In addition to being an important component of resistance to T. absoluta, acyl sugars have a simple inheritance (Resende et al, 2002;Gonçalves et al, 2007) that is essentially monogenic with modifier genes with additive effects, which makes their introduction particularly easy in elite tomato lines.…”

Section: Selection Of Tomato Genotypes Resistant To the Tomato Pinwormmentioning

confidence: 99%

Selection of processing tomato genotypes with high acyl sugar content that are resistant to the tomato pinworm

Dias¹,

Resende²,

Faria³

et al. 2013

Genet. Mol. Res.

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Herança de acilaçúcares em genótipos de tomateiro provenientes de cruzamento interespecífico

Cited by 27 publications

References 21 publications

Resistance of tomato genotypes to the silverleaf whitefly mediated by acylsugars

Resistance of tomato genotypes to the silverleaf whitefly mediated by acylsugars

Determining the inheritance of agronomic traits in chili pepper

Selection of processing tomato genotypes with high acyl sugar content that are resistant to the tomato pinworm

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