heterose e capacidade combinatória de linhagens de tomateiro ricas em acilaçúcares

Maciel, Gabriel Mascarenhas; Maluf, Wilson Roberto; Silva, Vanisse de Fátima; Neto, Álvaro Carlos Gonçalves; Nogueira, Douglas Willian; Gomes, Luíz Antônio Augusto

doi:10.1590/s1413-70542010000500012

Cited by 13 publications

(14 citation statements)

References 12 publications

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“…One explanation for the absence of heterosis in the majority of the crosses, for FW, is directly related to the mode of inheritance for fruit size. Maciel et al (2011) showed a predominance of additive effects in controlling the traits. There was no significant specific heterosis of the evaluated crosses.…”

Section: Resultsmentioning

confidence: 98%

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Diallel cross among fresh market tomato inbreeding lines

Souza¹,

Paterniani²,

Melo

et al. 2012

Hortic. Bras.

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The general combining ability (GCA), specific combining ability (SCA), and heterosis were studied in a complete diallel cross among fresh market tomato breeding lines with reciprocal excluded. Fifteen genotypes (five parents and ten hybrids) were tested using a randomized complete block design, with three replications, and the experiments were conducted in Itatiba, São Paulo state, Brazil, in 2005/06. The yield components evaluated were fruit yield per plant (FP), fruit number per plant (FN), average fruit weight (FW); cluster number per plant (CN); fruit number per cluster (FC), fruit wall thickness (FT) and number of locules per fruit (NL). Fruit quality components evaluated were total soluble solids (SS); total titratable acidity (TA); SS/TA ratio, fruit length (FL); fruit width (WI); length to width ratio (FL/WI). The data for each trait was first subjected to analysis of variance. Griffing's method 2, model 1 was employed to estimate the general (GCA) and specific (SCA) combining abilities. Parental and hybrid data for each trait were used to estimate of midparent heterosis. For plant fruit yield, IAC-2 was the best parental line with the highest GCA followed by IAC-4 and IAC-1 lines. The hybrids IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-4 showed the highest effects of SCA. High heterotic responses were found for fruit yield and plant fruit number with values up to 49.72% and 47.19%, respectively. The best hybrids for fruit yield and plant fruit number were IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-5, for fruit yield and plant fruit number, the main yield components.

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Section: Resultsmentioning

confidence: 98%

“…Diallel analysis has been widely used as a tool to identify hybrid combinations of interest for tomato breeding (Estrada-Salazar, 1984;Melo, 1987;Martinez et al, 1989;Braz, 1992, Padua et al, 2010, Maciel et al, 2011. The quality of the fruits refers to the set of physical attributes, sensory and chemical composition.…”

Section: Palavrasmentioning

confidence: 99%

Diallel cross among fresh market tomato inbreeding lines

Souza¹,

Paterniani²,

Melo

et al. 2012

Hortic. Bras.

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“…Pádua (2010), in evaluations of tomato lines with determinate growth, and Maciel (2010) found that additive effects were predominant for the total yield and average fruit mass.…”

Section: Diallel Analysismentioning

confidence: 99%

Combining ability of tomato lines in saladette-type hybrids

et al. 2014

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Given the growing importance of the saladette fresh tomato market in Brazil, the objective of this paper was to assess the combining abilities of lines potentially useful as parents of hybridsin this class. The experiment consisted of28 genotypes, 18 hybrids from a partial diallel crossobtained from crossing two groups of tomato lines (Group I, with 9 parents, and Group II, with 2 parents), 8 F1 experimental hybrids, and 2 commercial checks. Traits evaluated were total yield, mean fruit mass, fruit shelf life, shape and percentsoluble solids. Additive genetic effects were generally more important than non-additive effects for all traits evaluated. The TOM-542 and TOM-734 lines, from group I, and the TOM-720 line, from group II, presented high general combining ability (GCA) estimates for most of the traits of importance for saladette tomatoes, and were therefore considered suitable parents of hybrids of this class. Higher fruit shelf life of TOM-723 as a parental line compared with TOM-720 (Group II), was mainly attributed to the presence in the former of the nor A allele, which controls longer fruit shelf life. F1 hybrids (TOM-542 x TOM-720), (TOM-580 x TOM-720), (TOM-734 x TOM-720), and (TOM-727 x TOM-720) showed good performance and fruit quality and thus constitute possible commercial varieties.Key words: Solanum lycopersicum, saladette tomatoes, partial diallel. Capacidade combinatória de linhagens de tomateiro em híbridos do tipo italiano ResumoDevido à crescente importância do mercado do tomate tipo italiano no Brasil, objetivou-se conhecer a capacidade combinatória de linhagens de tomateiro potencialmente utilizáveis como genitoras de híbridos voltados a esse segmento. O experimento constituiu-se de 28 genótipos, sendo 18 híbridos oriundos de um dialelo parcial, obtido pelo cruzamento entre dois grupos de linhagens: Grupo I (nove genitores) e Grupo II (dois genitores), oito híbridos adicionais e duas testemunhas comerciais. Foram avaliados produção total, massa média de frutos, firmeza, formato e teor de sólidos solúveis. Houve predominância dos efeitos gênicos aditivos para todas as características avaliadas. As linhagens TOM-542 e TOM-734, pertencentes ao Grupo I, e TOM-720, Grupo II, apresentaram estimativas elevadas de capacidade geral de combinação para a maioria das características de importância para o segmento de tomate italiano, portanto, recomendadas para a obtenção de híbridos desse tipo. A superioridade da linhagem TOM-723 sobre a TOM-720 (Grupo II) quanto à firmeza de frutos foi atribuída, principalmente, à presença, na primeira, do alelo nor A , que condiciona maior conservação pós-colheita. Os híbridos experimentais F1 (TOM-542 x TOM-720), F1 (TOM-580 x TOM-720), F1 (TOM-734 x TOM-720) e F1 (TOM-727 x TOM-720) apresentaram bom desempenho agronômico e qualidade de fruto, constituindo possíveis materiais comerciais.Palavras-chave: Solanum lycopersicum, tomate saladette, dialelo parcial.

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“…There was also no significance for heterosis specific. According to Maciel et al (2010) the superiority of the hybrids in relation the mean of the parents occurs with the average heterosis significant. Still according to those authors, the no significance of the specific heterosis values reflects the greater importance of the additive variance, with the possibility of gains with the evaluation of the parents per se.…”

Section: Resultsmentioning

confidence: 99%

Estimates of heterosisparameters in elephant grass (Pennisetumpurpureum Schumach.) for bioenergy production

Menezes

Daher

Gravina

et al. 2015

Chilean J. Agric. Res.

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With a high growth rate and a DM yield of up to 80 t ha -1 yr -1 , elephant grass (Pennisetum purpureum Schumach.) has been utilized as an alternative source of energy. However, genotypes adapted to and productive in the different regions of Brazil need to be developed. Thus, the objectives of the present study were to estimate and evaluate heterotic effects in elephant-grass hybrids obtained in a partial diallel cross (5 × 5), with the aim of assisting the superior hybrids selection for bioenergy production. The experiment was conducted in Campos dos Goytacazes, Rio de Janeiro, Brazil. The following traits were evaluated: plant height (HGT), stem diameter (SD), leaf blade width (LBW), number of tillers per linear meter (NT), percentage of DM (%DM), and DM yield (DMY). The experiment was conducted in a randomized block design, with 35 treatments (five female parents, five male parents, and 25 hybrid combinations) and three replicates. The adopted statistical model was that of Miranda

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heterose e capacidade combinatória de linhagens de tomateiro ricas em acilaçúcares

Cited by 13 publications

References 12 publications

Diallel cross among fresh market tomato inbreeding lines

Diallel cross among fresh market tomato inbreeding lines

Combining ability of tomato lines in saladette-type hybrids

Estimates of heterosisparameters in elephant grass (Pennisetumpurpureum Schumach.) for bioenergy production

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