Capacidade combinatória de híbridos de tomateiro de crescimento determinado, resistentes a Begomovirus e Tospovirus

Raphael, Tullio; Pádua, Pereira de; Gomes, Luíz Antônio Augusto; Maluf, Wilson Roberto; Filho, José Luiz Sandes de Carvalho; Carlos, Álvaro; Neto, Gonçalves; Andrade, Marcela Carvalho

doi:10.1590/s0100-204x2010000800007

Cited by 13 publications

(5 citation statements)

References 13 publications

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“…O efeito da capacidade geral (CGC) revelou significância para os caracteres EP, IPL, DC e NGL, indicando que para estas características, existe pelo menos um genitor superior aos demais, com relação ao seu desempenho médio em combinações híbridas (RODRIGUES; LEAL; PEREIRA, 1998). A presença de significância para a CGC reflete a elevada importância dos efeitos gênicos aditivos na expressão dos caracteres avaliados, para o conjunto de genótipos testados (PÁDUA et al, 2010). Na cultura do feijão são utilizadas apenas linhas puras ou suas misturas, dessa forma a seleção é praticada geralmente em gerações mais avançadas onde maior progresso pode ser obtido.…”

Section: Resultsunclassified

Análise dialélica como ferramenta na seleção de genitores em feijão

Rocha¹,

Stinghen²,

Gemeli³

et al. 2014

Rev. Ciênc. Agron.

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RESUMO -O sucesso de um programa de melhoramento de plantas autógamas depende da escolha de genitores capazes de produzir progênies com as características desejadas. Sendo assim, este estudo teve como objetivo determinar os valores das capacidades geral e específica de combinação de quatro genótipos de feijão para os caracteres estatura de planta (EP) em centímetros, altura de inserção do primeiro legume (IPL) em centímetros, diâmetro do colo (DC) em milímetros, número de legumes por planta (NLP) e número de grãos por legume (NGL), a fim de avaliar o potencial destes como genitores para uso em programas de melhoramento. Quatro genitores de feijão (BAF07, BAF09 e IPR Uirapuru do grupo comercial preto e BAF50 do grupo comercial carioca) foram hibridados em um dialelo completo para a obtenção dos híbridos F 1 e recíprocos. O desempenho dos genitores, híbridos F 1 e recíprocos foi avaliado a campo em um experimento em blocos casualizados, com duas repetições, durante a safra agrícola de 2009/10. Para análise dialélica foi utilizada a metodologia proposta por Griffing (1956), método I, onde são incluídas n 2 combinações. O genótipo BAF07 pode ser empregado em blocos de cruzamentos quando o escopo do programa for aumentar os valores para EP, IPL, DC e NGL; foi possível observar ainda, através da magnitude dos componentes quadráticos a maior importância da capacidade geral de combinação, ou seja, dos efeitos aditivos no controle genético de características de importância agronômica em feijão. Palavras-chave: Phaseolus vulgaris L.. Capacidade de combinação. Melhoramento genético.ABSTRACT -The success of a breeding programme for autogamous plants depends on the choice of parents capable of producing progeny with the desired characteristics. Therefore, the objective of this study was to determine the values of the general and specific combining capabilities of four bean genotypes, for the characteristics: plant height (PH) in cm; height of insertion of the first pod (HIP) in cm; stem diameter (SD) in mm; number of pods per plant (NPP); and number of grains per pod (NGP); in order to assess their potential for use as parents in breeding programmes. Four bean parents (BAF07, BAF09 and IPR Uirapuru of the black commercial group and BAF50 of the carioca commercial group) were hybridized employing a complete diallel in order to obtain the F 1 hybrids and their reciprocals. The performance of the parents, F 1 hybrids and reciprocals was evaluated in the field in an experimental design of randomised blocks with two replications, during the 2009/10 crop season. For diallel analysis the methodology proposed by Griffing (1956) was used: Method I, where n 2 combinations are included. The BAF07 genotype can be used in blocks of crossings when the aim of the programme is to increase the values for PH, HIP, SD and NGP; it was also possible to observe a greater importance of the general combining capacity, by means of the magnitude of the quadratic components, i.e. of the additive effects in the genetic control of characteristics of agr...

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Section: Resultsunclassified

Análise dialélica como ferramenta na seleção de genitores em feijão

Rocha¹,

Stinghen²,

Gemeli³

et al. 2014

Rev. Ciênc. Agron.

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“…Using these estimates are selected the best genitors and the best hybrids for use in breeding programs (Ramalho, Santos, & Zimmermann, 1993;Cruz & Regazzi, 2001;Pádua et al, 2010). Thus, the aim of this study was to select tomato hybrids with zingiberene concentrations favorable to breeding programs.…”

Section: Introductionmentioning

confidence: 99%

Selection of Tomato Hybrids With Zingiberene Concentration for Breeding Programs to Pest Resistance

Fernandes¹,

Fernandes²,

Silva³

et al. 2014

JAS

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The zingiberene is a sesquiterpene that is present in tomato leaves. This compound is known to promote resistance to pests and diseases. The Brazil has a germplasm bank of vegetable at Universidade Federal de Viçosa (HGB-UFV) crops with over 8 million accesses. One technique that helps in the choice of progenitors with favorable concentrations of zingiberene is the diallel crosses. The diallel crosses allow the estimation of general combining ability (GCA) and specific combining ability (SCA). Thus, the aim of this study was to find out tomato hybrids with high zingiberene concentrations. The genitors were divided into two contrasting groups for resistance to pests. The characterization and quantification spectrophotometric of zingiberene was performed, obtaining absorbance values at 270 nm. To determine the content of zingiberene in hybrids those were coming from the diallel cross. The analysis from the spectrophotometric method was performed. The estimates of GCA and SCA of these hybrids at combinations HGB 2119 x LA716, HGB 2119 x PI 12786, HGB 2214 x HGB 674, HGB 2064 x HGB 674, HGB 2214 x PI 127826, HGB 985 x LA 716 and Santa Clara x HGB 674 have high potential in tomato plant breeding aiming of resistance to pests and diseases.

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“…The simple-cross hybrids, Dominador and Compack, showed positive values for all the evaluated traits, except for the vertical fruit diameter, which was expected for the inherent traits of this varietal group. However, Pádua et al (2010) found predominant additive effects for the total yield and average fruit mass in tomatoes with determined growth. Figueiredo et al (2017) observed a predominance of additive effects in the genotypes for average fruit mass, fruit shape, and length-width ratio traits of fruits for the industry.…”

Section: Statistical Componentsmentioning

confidence: 90%

Performance of the double-cross tomato hybrids from a partial diallel

et al. 2021

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Knowledge of the combining ability of genotypes, genetic diversity, and heterosis play the paramount role in obtaining double-cross hybrids with high productivity. This study was aimed at evaluating these parameters in tomato genotypes using partial diallel crosses among the commercial single-cross hybrids, which verified the possibility of using double-cross hybrids for commercial purposes. Tomato genotypes included 15 double-cross hybrids, their genitors, and two commercial genotypes as checks. Of the fifteen double-cross hybrids of tomato, two crosses exhibited superiority, such as Aguamiel × Compack and Dominador × Compack, mainly for the total and commercial fruit yields. The phenotypic expression of the trait is controlled by the genes with non-additive effects, whereas the genes with additive effects account for the genotypes of fruit mass, horizontal diameter, vertical diameter, and bunch insertion height. Regarding the genetic diversity, molecular analyses pointed out polymorphism for 79 percent of the evaluated loci evidencing a high genetic variability among the genitors. The heterosis values were low for most of the crosses, except for Forty × Plutão that represented 107 percent of heterosis for the total fruit yield. As compared with the commercial checks, the diallel cross generated superior quality hybrids, which inferred the possibility of obtaining double-cross hybrids of tomato with significant heterosis.

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Capacidade combinatória de híbridos de tomateiro de crescimento determinado, resistentes a Begomovirus e Tospovirus

Cited by 13 publications

References 13 publications

Análise dialélica como ferramenta na seleção de genitores em feijão

Análise dialélica como ferramenta na seleção de genitores em feijão

Selection of Tomato Hybrids With Zingiberene Concentration for Breeding Programs to Pest Resistance

Performance of the double-cross tomato hybrids from a partial diallel

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