Seleção assistida por marcadores para teor de matéria seca e açúcares redutores em tubérculos de batata

Bhering, Leonardo Lopes; Pinto, César Augusto Brasil Pereira; Benites, Flávio Rodrigo Gandolfi; Leite, Monik Evelin; Silva, Felipe Lopes da

doi:10.1590/s0103-84782009000100007

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…Situação diferente foi verificada para os caracteres relacionados com o processamento, em que muita similaridade foi verificada entre os ambientes. Isso pode ser atribuído à maior herdabilidade dos caracteres de processamento do que àqueles relacionados com o rendimento de tubérculos, muito embora este parâmetro dependa da diversidade genética do material em estudo e das condições ambientais (Simon et al, 2009;Bheringi et al, 2009).…”

Section: Ciclo Vegetativo Cloneunclassified

Desempenho de clones elite de batata para caracteres agronômicos e de qualidade industrial

et al. 2015

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Desempenho de clones elite de batata para caracteres agronômicos e de qualidade industrialO objetivo deste trabalho foi verificar o desempenho de clones elite de batata, em relação a caracteres agronô-micos e de qualidade industrial. Os experimentos foram realizados em Pelotas, RS, Canoinhas, SC, e Londrina, PR. Foi avaliado um conjunto de clones elite, pertencentes ao Programa de Melhoramento Genético de Batata, da Embrapa. O delineamento experimental foi o de blocos casualizados, com três repetições para Pelotas e Londrina e quatro para Canoinhas. Foram avaliados os caracteres massa total de tubérculos, massa comercial de tubérculos, número de tubérculos comerciais, percentagem de massa de tubérculos comerciais, massa média de tubérculos comerciais, peso específico, cor de fritura e ciclo vegetativo. A partir dos dados obtidos foram realizadas as análi-ses de variância para cada local e teste de agrupamento de médias para cada caráter. Para identificação de clones apropriados ao mercado 'in natura', em que é fundamental o elevado potencial produtivo e precocidade, os clones mais promissores foram F80-03-06 e CL02-05, quando comparados à cultivar testemunha Ágata. Para o processamento industrial, em que o peso específico, a cor de fritura e o rendimento de tubérculo são caracteres importantes, destacou-se o clone F81-01-06, que apesar de não apresentar os maiores rendimentos totais, apresentou tubérculos grandes, ciclo vegetativo intermediário e boa aptidão para fritura, quando comparando-se ao cultivar testemunha Asterix.Palavras-chave:Solanum tuberosum L., ciclo vegetativo, rendimento, peso específico, cor de palitos fritos. Giovani Olegario da Performance of elite potato clones for agricultural and industrial quality traitsThe objective of this study was to evaluate the performance of elite potato clones for agricultural and processing quality traits. The experiments were carried out in Pelotas, State of Rio Grande do Sul, Canoinhas, State of Santa Cantarina, and Londrina, State of Paraná. A set of elite clones of the Embrapa Potato Breeding Program was evaluated. The experimental design was a randomized complete block, with three replications to Pelotas and Londrina, and four to Canoinhas. This experiment evaluated total mass of tubers, commercial mass of tubers, number of commercial tuber, mass percentage of commercial tuber, average mass of commercial tuber, specific gravity, frying color and vegetative cycle. Analysis of variance for each site and mean grouping test of each trait were performed from the data obtained in the experiment. By examining the results from the perspective of identifying the most suitable clones for fresh market, where high yield potential and early maturity are essential, compared to the control cultivar Ágata, the clones that appeared as the most promising were F80-03-06 and CL02-05. For processing, for which the specific weight, frying color, tuber yield are important traits clone F81-01-06 stood out, despite not having the highest yields, it has large tubers, intermediate ve...

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Section: Ciclo Vegetativo Cloneunclassified

Desempenho de clones elite de batata para caracteres agronômicos e de qualidade industrial

et al. 2015

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“…However, the majority of the other clones, except F156-07-19 and check 'Agata', are in the same confidence interval of the values obtained for this check 'Asterix'. The specific gravity is highly correlated with the dry matter content, and it is a non-destructive trait of the samples and of easy and rapid evaluation (Bhering et al, 2009). Silva et al (2012) verified specific gravity values of 1.082 for 'Asterix' and 1.062 for 'Agata'.…”

Section: Resultsmentioning

confidence: 99%

Selection of processing tomato genotypes resistant to two spotted spider mite

et al. 2018

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One of the major problems in cultivation of tomato is the occurrence of pests and diseases. The objective of the research was to select genotypes from the second generation of the first backcross (F2BC1) between the tomato cultivar for processing S. lycopersicum (cv. Redenção) and the wild access S. habrochaites var. hirsutum (PI-127826), with high levels of zingiberene (ZGB), resistant to the twospotted spider mite Tetranychus urticae (Acari: Tetranychidae). From the F2BC1 population. The ZGB content was quantified and five plants with high zingiberene selected (RVTZ 2011-079-117, RVTZ 2011-079-185, RVTZ 2011-079-335, RVTZ 2011-079-345 and RVTZ 2011-079-503) and four with low zingiberene content (RVTZ 2011-079-417, RVTZ 2011-331-460, RVTZ 2011-079-538 and RVTZ 2011-079-548) were selected. Genotypes selected for high and low ZGB content and the parentals S. habrochaites var. hirsutum access PI-127826 and ‘Redenção’ were evaluated for repellency to the twospotted spider mite. There was a significant and inverse correlation between ZGB content and average distances travelled by mites on tomato leaflets. The genotypes of the F2BC1 generation with high zingiberene levels RVTZ 2011-079-117, RVTZ 2011-079-185, RVTZ 2011-079-335, RVTZ 2011-079-345 and RVTZ 2011-079-503 are promising for progress in achieving resistant lines to arthropod pests. Among them RVTZ 2011-079-117 stands out for resistance to twospotted spider mite.

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“…Biotechnological techniques, such as microsatellite markers, make it possible to select individuals based on their genotype, independently of biotic or abiotic factors, and at any developmental stage of the plant. In this way, the identification of molecular markers that are linked to phenotypic traits, such as the stripe pattern of watermelon fruits, enables selection of the desired external pattern of the fruit still in the seedling stage, as well as a better understanding of the inheritance of the trait between progenies and a reduction in the number of individuals that have to be examined in the field (Bhering et al, 2009). Marker-assisted selection (MAS) tends to speed up improvement programs, because selection can be conducted during the initial stages of plant development, which is of fundamental importance for the development of new cultivars (Demore, 2008).…”

Section: Introductionmentioning

confidence: 99%

Microsatellite markers linked to the locus of the watermelon fruit stripe pattern

et al. 2015

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ABSTRACT. Agronomic performance and external and internal appearance of watermelon (Citrullus lanatus) fruit are important traits that should be taken into consideration during the development of a new cultivar, as well as being the principal identification elements used by the consumer, which are based on the external appearance and quality of the fruit. Externally, the fruit can be characterized in terms of the shape, the color of the lower rind, and the presence of grooves and stripes, the stripes can be classified as clearly defined or diffuse. The objective of this study was to identify microsatellite markers linked to the stripe pattern of watermelon fruit to support watermelon improvement programs, with the selection of this characteristic in the plantlet stage. F1 and F2 populations, result of a cross between the cultivars BRS Opara (clearly defined stripes) and Pérola (diffuse stripes), were phenotyped for their fruit stripe pattern. The CTAB 2X protocol was used for DNA extraction and 116 microsatellite markers were examined in a group of F2 plants that had fruit with well-defined stripes and fruit with diffuse stripes. The microsatellite loci MCPI_05 and MCPI_16 exhibited a linkage to the stripe pattern at a distance of 1.5 and 1.8 cM, respectively, with LOD scores of 39.28 and 38.11, respectively, which were located on chromosome six of the watermelon genome. These markers can be used in marker-assisted selection in watermelon improvement programs, by various research institutions.

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Seleção assistida por marcadores para teor de matéria seca e açúcares redutores em tubérculos de batata

Cited by 7 publications

References 8 publications

Desempenho de clones elite de batata para caracteres agronômicos e de qualidade industrial

Desempenho de clones elite de batata para caracteres agronômicos e de qualidade industrial

Selection of processing tomato genotypes resistant to two spotted spider mite

Microsatellite markers linked to the locus of the watermelon fruit stripe pattern

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