Base genética do hábito de crescimento e florescimento em tomateiro e sua importância na agricultura

Piotto, Fernando Ângelo; Peres, Lázaro Eustáquio Pereira

doi:10.1590/s0103-84782012001100006

Cited by 15 publications

(15 citation statements)

References 21 publications

(18 reference statements)

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“…This occurred, as expected, because the dwarf lines have indeterminate growth Silva;Fernandes, 2015). According to the review done by Piotto and Peres (2012), the indeterminate growth habit is controlled by the dominant allele Self Pruning (SP), which has dominance among the others growth habits. Despite all the hybrids had indeterminate growth, the growth habit of the parents had influenced the performance of the hybrids.…”

Section: Resultssupporting

confidence: 55%

“…Higher fruit quantity is closely related to the genes that control the growth habit of tomato plants belonging to the self-pruning family (SP) (Piotto;Peres, 2012). Some studies have shown that the hybrid vigor of tomatoes may stem from a single growth habit gene in heterozygous genotypes [flowering gene -single flower truss (SFT)], representing increases in tomato yield of up to 60% (Krieger;Lippman;Zamir, 2010).…”

Section: Finzi R R Et Almentioning

confidence: 99%

“…The weight of the fruit coming from SDxA parentage may have been higher due to the expression of other genes linked to flowering (Krieger;Lippman;Zamir, 2010). Soluble solid levels may have been affected not only indirectly by plant morphology, but also directly by biochemical mechanisms (Piotto and Peres, 2012).…”

Section: Finzi R R Et Almentioning

confidence: 99%

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Agronomic performance of mini-tomato hybrids from dwarf lines

2017

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Little is known about the commercial potential of mini-tomato hybrids obtained from one dwarf parent. Thus, our objective was to evaluate the agronomic performance of mini-tomato hybrids obtained by crossing a dwarf line (A) with normal lines with indeterminate (I), determinate (D) and semi-determinate (SD) growth habits. The experiment was conducted in a greenhouse at the Estação Experimental de Hortaliças at the Universidade Federal de Uberlândia-UFU in Monte Carmelo, Brazil. The experiment was completely randomized with 17 treatments and four repetitions. The genetic material consisted of 16 experimental mini-tomato hybrids from the tomato germplasm bank at UFU, and a commercial hybrid (Mascot) as a control. The following variables were used to evaluate agronomic performance: fruit weight (g); number of fruits plant ; stem diameter (mm); distance between first bunch and soil (cm); internode length (cm) and total soluble solids (°Brix). The growth habit of the parents influenced the performance of the hybrids. In general, the mini-tomato hybrids from dwarf lines differed from the control with respect to all variables except number of fruits plant -1 , number of fruits bunch -1 and stem diameter. On average, hybrids from dwarf lines showed higher productivity (20%), shorter internodes (11%) and a shorter distance between the first bunch and the ground (30%), relative to the control. Using dwarf lines to obtain mini-tomato hybrids was shown to be viable since the hybrids demonstrated better agronomic performance.

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Section: Resultssupporting

confidence: 55%

Section: Finzi R R Et Almentioning

confidence: 99%

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Agronomic performance of mini-tomato hybrids from dwarf lines

2017

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“…A característica hábito de crescimento possui herança monogênica com dominância completa do alelo SP (Self-Pruning) sobre o alelo sp (self-pruning), sendo o fenótipo hábito determinado condicionado pelo recessivo (Boiteux et al, 2012). Por outro lado, Piotto & Peres (2012) comentam que pesquisas mais recentes têm demonstrado que o hábito de crescimento no tomateiro possui herança mais complexa.…”

Section: Introductionunclassified

Desempenho e divergência genética de genótipos de tomate para processamento industrial

et al. 2016

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Performance and genetic divergence of tomato genotypes for industrial processingThe growth of the tomato market for industrial processing arouses the interest of national institutions and multinational companies of vegetable seeds in the development of new hybrids. The objective of the study was evaluate the performance and genetic divergence of tomato genotypes, with respect to fruit firmness, fruit maturation concentration, jointless, plant vigor, leaf cover of the fruit, plant healthiness, average yield per plant and soluble solids (°Brix). First, we evaluated 53 hybrids, three of them being controls and one of the controls being H9553, the most sown hybrid in Brazil. Only 12 genotypes and the commercial hybrid H9553 presented the necessary criteria for processing tomatoes, based on characteristics fruit firmness, concentration of fruit maturation and lack of peduncle retention index. Genotypes 1, 18 and 48 stood out for soluble solids, concentration of fruit maturation and fruit firmness, respectively. The genetic divergence and groupings reveals that genotypes 1 and 18 present dissimilarity from the other genotypes. While the first showed a higher average plant vigor, leaf cover of the fruit, plant sanity and °Brix, the second revealed a lower average fruit firmness, concentration of fruit maturation and °Brix. Hybrid 3, 6, 8, 14, 24, 37 and 48 showed genetic similarity with the commercial hybrid H9553, which characterizes them as potential for generating new hybrids with high productivity and quality and, consequently, with acceptability of the industrial tomato production chain. Additionally, due to their favorable characteristics, they can be used for further crosses with genotypes of other groups which also present favorable characteristics.

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“…The tomato has three growth habits: indeterminate, determined and semi-determinate, being this trait governed by genes of self-pruning family (PIOTTO;PERES, 2012). Compared to genotypes with indeterminate growth, in determinate growth is not necessary the accomplishment of onerous cultural practices such as sprout thinning, apical pruning and the conduct of plants with polythene strips or stakes (FILGUEIRA, 2008).…”

Section: Introductionmentioning

confidence: 99%

Growth habit in mini tomato hybrids from a dwarf line

2017

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ABSTRACT:The growth habit directly influences the tomato architecture, impacting on agronomic performance of mini-tomato hybrids. However, little is known about the growth habit of mini-tomatoes hybrids obtained by the crossing of dwarf lines versus normal lines with different growth habits. The objective of this study was to determine the type of growth that occurs when crossing a mini-tomato dwarf line versus normal phenotype lines with indeterminate, determined and semi-determinate growth habit. The methodology consisted of biparental crosses [determined from a cross between a dwarf line with normal lines of different growth habits (determinate, semi-determinate and indeterminate)] and reciprocal backcrosses of the F1 to the parents [normal lines (P 1 ) and dwarf line (P 2 )], and obtained the F2 generation. Was evaluated phenotypically the growth habit in each generation. The growth habit proportions of F 1 (P 1 xP 2 ), F1 (P 2 xP 1 ), F 2 , F 1 RC 1 (P 1 ) and F 1 RC 1 (P 2 ), were classified after checking the expected and observed frequencies using the χ² test (F= 0.05). Was concluded that, when the determined and semi-determined growth habits are used as parents to produce hybrids, in F 2 population growth habits shows 3:1 type segregation. Futhermore, regardless of the normal parent growth habit, the hybrids (F 1 ) always will show indeterminate growth when they are crossed with the mini-tomato dwarf line of this study.

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Base genética do hábito de crescimento e florescimento em tomateiro e sua importância na agricultura

Abstract: RESUMO Variedades ou híbridos de tomateiro utilizados para produção de molhos e ketchups costumam ter hábito determinado, enquanto a maioria dos genótipos utilizados na

Cited by 15 publications

References 21 publications

Agronomic performance of mini-tomato hybrids from dwarf lines

Agronomic performance of mini-tomato hybrids from dwarf lines

Desempenho e divergência genética de genótipos de tomate para processamento industrial

Growth habit in mini tomato hybrids from a dwarf line

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