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| Silva,Edgard Henrique Costa; Soares,Renato Silva; Borges,Heloísa Oliveira; Franco,Carolina Andrade; Braz,Leila Trevisan; Soares,Pedro Luiz Martins. |
| Abstract: The objective of this work was to estimate the damage caused by Meloidogyne enterolobii in okra (Abelmoschus esculentus) and to verify the reliability of the reproduction factor as a suitable measure for selecting resistant okra genotypes. Increasing populations of M. enterolobii - 0, 500, 1,500, 3,000, 5,000, and 7,000 eggs and second-stage juveniles (J2) per plant, - were evaluated, in a completely randomized design. The pathogen showed a parasitism pattern similar to that of M. incognita, causing a significant decrease in morphological and agronomic traits. The pathogen reproduction factor should be used in the selection of okra genotypes for tolerance to M. enterolobii, in populations above 3,000 eggs or J2. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abelmoschus esculentus; Reproduction factor; Root-knot nematode; Susceptible host. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102900 |
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| Candido,Willame dos Santos; Castoldi,Renata; Santos,Lucas da Silva; Tobar-Tosse,Dora Enith; Soares,Pedro Luiz Martins; Braz,Leila Trevisan. |
| ABSTRACT: In order to assess the genetic control of resistance in the melon ‘Gaúcho Redondo’ to the root-knot nematode Meloidogyne incognita, an experiment was conducted in a randomized complete block design with three blocks and six treatments using the parental lines ‘Gaúcho Redondo’ (P1 resistant) and JAB 20 (P2 susceptible), as well as F1, F2, and backcross generations (RC1P1 and RC1P2). Seventy days after inoculation, individual plants were evaluated for resistance using the nematode reproduction factor (RF). The hypothesis of monogenic inheritance was rejected by the chi-square test (χ2), and results indicated that resistance is controlled by more than one gene locus, as confirmed by the quantitative analysis that revealed the presence of six genes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; Genetic inheritance; Plant breeding; Reproduction factor. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500201 |
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| Paes-Takahashi,Vanessa dos Santos; Soares,Pedro Luiz Martins; Carneiro,Franciele Alves; Ferreira,Rivanildo Junior; Almeida,Eduardo José de; Santos,Jaime Maia dos. |
| O comércio de mudas sem certificação contribui para disseminação de pragas e doenças, que podem causar sérios danos às plantas cultivadas. Na região de Itapetininga (SP), foram apreendidas, pela equipe da Defesa Agropecuária, mudas de aceroleira, goiabeira e amoreira, comercializadas em caminhões, que apresentavam galhas nas raízes, sintoma típico causado por Meloidogyne spp. A identificação da espécie foi feita através da morfologia da configuração perineal de fêmeas e região labial de machos, bem como através da caracterização do fenótipo enzimático de esterase. Foi constatada a presença de M. enterolobii nas amostras analisadas. Trata-se do primeiro relato do parasitismo de M. enterolobii em mudas de amoreira no mundo. |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Nematoide; Psidium guajava; Malpighia emarginata.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000500757 |
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