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3 results on '"Márcia Souza de Oliveira"'

1. Relationship between production, nematodes and 'redness' in strawberries

Author

Paula Nogueira Curi, Pedro Maranha Peche, Rafael Pio, Csaignon Mariano Caproni, and Márcia Souza de Oliveira

Subjects
Botrytis cinerea, Meloidogyne hapla, Fragaria ananassa, Agriculture, Agriculture (General), S1-972
Abstract

ABSTRACT: In recent years "redness" has increasingly appeared in strawberry plants with leaves taking on a reddish color. No causal agent has been associated with plants. Since strawberries presented problems due to the incidence of nematodes, the purpose of this study was to look at the relationship between production, resistance to the Meloidogyne hapla nematode and the "redness" symptom in strawberry cultivars. Two experiments were performed, both with the 'Camino Real', 'Festival', 'Oso Grande', 'Albion' and 'Camarosa' cultivars. The first experiment was performed in the field, where the following were evaluated: strawberry production, fruit quality, macro and micronutrient contents in fruit and leaves, percentage of plant survival, incidence of nematodes, quantity of eggs in the roots and juveniles in the soil, and the incidence of Botrytis cinerea . In the second experiment, the strawberries were transplanted into pots and filled with pinus bark-based commercial substrate. Half the pots were inocculated with Meloidogyne hapla . Cultivars presented differences in fruit production and also in the incidence of "redness". Lowest performance in production was related to the high incidence of the nematode Meloidogyne hapla. 'Oso Grande' and 'Albion' presented nematode-resistant behavior. It was possible find a relationship between the incidence of the Meloidogyne hapla nematode, and the incidence of "redness" only 'Camino Real' cultivar.

Published
2016
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2. Reaction of common bean to Meloidogyne incognita race 1 and Meloidogyne javanica

Author

Cleiton Lourenço de Oliveira, Natália Souza Oliveira, Márcia Souza de Oliveira, Vicente Paulo Campos, Wilson Roberto Maluf, and Luiz Antônio Augusto Gomes

Subjects
Phaseolus vulgaris, root-knot nematode, resistance, Agriculture (General), S1-972, Biotechnology, TP248.13-248.65
Abstract

ABSTRACT Identification of common bean genotypes resistant to the root-knot nematodes may be useful for bean breeding programs. The objective of this study was to evaluate the reaction of bean genotypes to M. incognita race 1 and M. javanica. Two independent trials to assess resistance to both root-knot nematodes were carried out with fifty-eight common bean genotypes and six snap bean genotypes. The experiments were arranged in a randomized block design, with three replications and two plants per plot. A total of 10,000 nematode eggs were inoculated per plant 15 days after germination. At forty-five days after inoculation, the root system of each plant was harvested and the nematode eggs were extracted. The number of eggs per gram of root was counted and the Reproduction Factor and the Reduction of the Reproduction Factor were calculated. The performance of the genotypes differed between the trials, indicating different resistance reactions to the nematode species evaluated. The genotypes VP-25 and BRS Valente were resistant to M. incognita race 1. The genotypes Aporé, Ouro Vermelho, Radiante, and CNFP 10793 showed good resistance to both M. incognita race 1 and M. javanica, with potential as source of resistance in breeding programs. There was a significant correlation between root mass and number of eggs. The correlation between nematode reproduction and shoot mass was null.

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3. Reação de genótipos de feijão a Meloidogyne incognita raça 1 e a Meloidogyne javanica

Author

Wilson Roberto Maluf, Cleiton Lourenço de Oliveira, Márcia Souza de Oliveira, Natália Souza Oliveira, Vicente Paulo Campos, and Luiz Antonio Augusto Gomes

Subjects
root-knot nematode, General Veterinary, biology, lcsh:Biotechnology, food and beverages, biology.organism_classification, Phaseolus vulgaris, lcsh:S1-972, resistência, resistance, Horticulture, Race (biology), lcsh:TP248.13-248.65, nematoide das galhas, Meloidogyne incognita, lcsh:Agriculture (General), General Agricultural and Biological Sciences, Meloidogyne javanica
Abstract

Identification of common bean genotypes resistant to the root-knot nematodes may be useful for bean breeding programs. The objective of this study was to evaluate the reaction of bean genotypes to M. incognita race 1 and M. javanica. Two independent trials to assess resistance to both root-knot nematodes were carried out with fifty-eight common bean genotypes and six snap bean genotypes. The experiments were arranged in a randomized block design, with three replications and two plants per plot. A total of 10,000 nematode eggs were inoculated per plant 15 days after germination. At forty-five days after inoculation, the root system of each plant was harvested and the nematode eggs were extracted. The number of eggs per gram of root was counted and the Reproduction Factor and the Reduction of the Reproduction Factor were calculated. The performance of the genotypes differed between the trials, indicating different resistance reactions to the nematode species evaluated. The genotypes VP-25 and BRS Valente were resistant to M. incognita race 1. The genotypes Aporé, Ouro Vermelho, Radiante, and CNFP 10793 showed good resistance to both M. incognita race 1 and M. javanica, with potential as source of resistance in breeding programs. There was a significant correlation between root mass and number of eggs. The correlation between nematode reproduction and shoot mass was null. RESUMO A identificação de genótipos de feijão resistentes aos nematoides das galhas pode ser útil aos programas de melhoramento do feijoeiro. Objetivou-se com este trabalho verificar a reação de genótipos de feijão aos nematoides das galhas M. incognita raça 1 e M. javanica. Dois ensaios independentes para avaliação da reação de resistência a Meloidogyne incognita raça 1 e Meloidogyne javanica foram realizados com cinquenta e oito genótipos de feijão e seis genótipos de feijão vagem. O delineamento foi em blocos casualizados com três repetições e parcelas de duas plantas. As plantas foram inoculadas com 10.000 ovos por planta aos quinze dias após a germinação. Aos quarenta e cinco dias após a inoculação, o sistema radicular de cada planta foi colhido e submetido à extração dos ovos. Foram obtidos dados de número de ovos por grama de raiz e calculados o fator de reprodução e a redução do fator de reprodução. O comportamento dos genótipos divergiu entre os ensaios, indicando diferentes reações de resistência conforme a espécie de nematoide avaliada. Os genótipos VP-25 e BRS Valente foram considerados resistentes a M. incognita raça 1. Os genótipos Aporé, Ouro Vermelho, Radiante e CNFP 10793 apresentaram bons resultados de resistência tanto a M. incognita raça 1 quanto a M. javanica, podendo servir como fontes de resistência para programas de melhoramento. Houve correlação significativa entre massa de raiz e número de ovos. A correlação entre reprodução do nematoide e massa de parte aérea foi nula.

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