Interação genótipo x ambiente em cultivares de alface na região de Jaboticabal

Figueiredo, Eduardo Barretto de; Malheiros, Euclides Braga; Braz, Leila Trevisan

doi:10.1590/s0102-05362004000100013

Cited by 16 publications

(11 citation statements)

References 2 publications

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“…A adaptação de um cultivar em ampla faixa de ambientes é considerada de interesse para o produtor, quando se propõe a incrementar cultivos (Figueiredo et al, 2004). Dificuldades surgem quando diversos fatores ambientais afetam o crescimento e o desenvolvimento da cultura da alface.…”

Section: Introductionunclassified

Análise de crescimento em cultivares de alface nas condições do sul do Piauí

et al. 2016

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Análise de crescimento em cultivares de alface nas condições do sul do PiauíObjetivou-se, com este trabalho, avaliar o crescimento de quatro cultivares de alface, nas condições do sul do Piauí, para recomendar os melhores para a região. O experimento foi realizado em casa de vegetação, em blocos casualizados, com avaliação em parcelas subdivididas no tempo, avaliadas em seis épocas (20, 24, 28, 32, 36, Growth analysis in lettuce cultivars in Southern PiauíThe aim of this study was to evaluate the growth and recommend the best one (s) of four lettuce cultivars in Southern Piaui. The experiment was carried out in a greenhouse with a randomized block design, with split-plot in time evaluation (20, 24, 28, 32, 36, 40 days after sowing -DAS), and the corresponding treatments to four cultivars (Americana Rafaela ® , Grand Rapids TBR ® , Crespa Repolhuda ® and Repolhuda todo ano ® ) with five replications. We evaluated leaf area; leaf number; stem diameter; shoot fresh mass; shoot, root and total dry mass and physiological indexes of growth analysis. The cultivars showed significant effect in the studied parameters. Under the submitted conditions, the Americana Rafaela ® and Repolhuda todo ano ® lettuce cultivars showed better performance and greater morphological and physiological indexes. The cultivars Americana Rafaela ® and Repolhuda todo ano ® can be grown under Southern Piaui conditions.

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Section: Introductionunclassified

Análise de crescimento em cultivares de alface nas condições do sul do Piauí

et al. 2016

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“…Probably, the differences between cultivars occurred due to their genetic characteristics of adaptation to salt stress, which varies between crop species and between genotypes (Figueiredo et al, 2004). Yoshida (2002) pointed out that some genotypes have the ability to exclude the roots in saline medium contributing to increase ratio and express their high tolerance to salts.…”

Section: Biomass Of Leavesmentioning

confidence: 99%

Production of Hydroponic Lettuce under Different Salt Levels of Nutritive Solution

Guimarães¹,

Nascimento²,

Melo³

et al. 2017

JAS

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The objective of this study was to evaluate the effects of different levels of salinity on the production of two cultivars of crisp lettuce under hydroponic cultivation. The research was performed in a protected environment at the Federal University of Campina Grande (UFCG), state of Paraíba, during in the period from 1 to 22 September 2016. The experimental design was completely randomized (CRD) which involved 4 × 2 factorial scheme with four levels of electrical conductivity of the nutrient solution (1.6, 3.6, 5.6 and 7.6 dS m -1 ) and two lettuce cultivars, Valentina (C1) and Alcione (C2), that totalized 8 treatments with 3 replicates. The evaluated variables were fresh and dry biomass of leaves, stems and roots. The results were subjected to analysis of variance by F-test (p < 0.05), the averages were compared by Tukey's test (p < 0.01 and p < 0.05), and quantitative variables data were submitted to regression test. It was observed that the fresh leaves biomass and fresh stem biomass were significantly affected by salinity in all evaluated periods. However, cultivar factor singly presented significant statistical difference only for fresh root biomass. There was statistical interaction between the factors at 15 DAT for dry leaves biomass and at 21 DAT for dry stem biomass. It was concluded that, although some variables were significantly affected by the salinity of the nutritive solution, the hydroponic lettuce production was satisfactory in NFT system for electrical conductivity up to 3.5 dS m -1 for variables with commercial relevance.

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“…Assim não se considera a adaptação específica de cada genótipo em cada local (Cruz & Castoldi, 1991). Estudos da interação genótipo x ambiente têm sido realizados em diversas hortaliças, tais como: alface (Figueiredo, 2004), tomate (Gualberto, 2002) e batata (Peixoto et al, 2002).…”

Section: Introductionunclassified

Crescimento de cultivares de cenoura em diferentes ambientes

et al. 2015

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A cenoura (Daucus carota) é a quinta hortaliça mais cultivada no Brasil, apresentando produtividade média de apenas 32,1 t ha -1 com potencial produtivo para alcançar 80 t ha -1 . Uma das causas apontadas para esta baixa produtividade é o plantio de cultivares não adaptadas aos ambientes encontrados no Brasil. Sabendo da importância dos efeitos da interação genótipo e ambiente, objetivou-se avaliar o crescimento de cultivares de cenoura no cultivo de outono-inverno em dois municípios com características edafo-climáticas distintas do Alto Vale do Jequitinhonha, MG. Foram cultivadas seis cultivares de cenoura (Brasília, Nantes, Kuronan, Esplanada, Planalto e Tornado) em dois ambientes (Couto de Magalhães de Minas e Diamantina). As plantas foram amostradas semanalmente e foram ajustadas equações de regressão a partir do tempo. Para a altura de plantas ajustou-se modelos lineares para Couto de Magalhães de Minas e para Diamantina modelos quadráticos, já no comprimento de raízes o comportamento se inverteu. Essa diferença mostra que ambientes distintos alteram o padrão de crescimento. Os ambientes distintos resultaram em diferentes comportamentos dos cultivares de cenoura, sendo que em Couto de Magalhães de Minas a produtividade foi maior. Independente do ambiente de cultivo a variedade Nantes apresentou menor produtividade. O cultivar Planalto é mais indicada para plantio em Diamantina e a Kuronan e Planalto para Couto Magalhães de Minas. Palavras-chave: análise de crescimento, Daucus carota, produtividade Growth of carrot cultivars in different environments AbstractThe carrot (Daucus carota) is the fifth most widely grown vegetable crop in Brazil, with an average yield of only 32.1 t ha-1 with productive potential to reach 80 t ha-1. One reason cited for this low productivity is planting varieties not adapted to the environments found in Brazil. Knowing the importance of genotype and environment interaction, aimed to evaluate the growth of carrot cultivars in autumn-winter crop in two counties with different soil and climatic characteristics of the Upper Valley Jequitinhonha, MG. Six carrot cultivars (Brasilia, Nantes, Kuronan, Esplanade, Plateau and Tornado) were grown in two environments (Couto de Magalhães of Mines and Diamantina). Plants were sampled weekly and regression equations were adjusted from time. For plant height set to linear Couto de Magalhães de Diamantina Minas and quadratic models, as in root length models the behavior was reversed. This difference shows that different environments alter the pattern of growth. The distinct environments resulted in different behaviors of cultivars of carrot, and in Couto de Magalhães de Minas productivity was higher. Regardless of the growing environment to Nantes variety showed lower productivity. The Plateau cultivar is best suited for planting in the Diamantina and Kuronan and Plateau to Couto Magalhães de Minas.

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Interação genótipo x ambiente em cultivares de alface na região de Jaboticabal

Cited by 16 publications

References 2 publications

Análise de crescimento em cultivares de alface nas condições do sul do Piauí

Análise de crescimento em cultivares de alface nas condições do sul do Piauí

Production of Hydroponic Lettuce under Different Salt Levels of Nutritive Solution

Crescimento de cultivares de cenoura em diferentes ambientes

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