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| Casais,Vinicius Oliveira; Patrocínio,Epaminondas do; Oliveira,Saulo Alves Santos de; Schnadelbach,Alessandra Selbach; Barbosa,Cristiane de Jesus; Barbosa,Luciana Veiga. |
| O objetivo deste trabalho foi avaliar, por meio de marcadores SSR, a diversidade genética de Xylella fastidiosa no Estado da Bahia. Foram estudadas duas das principais regiões produtoras de citros no Estado, o Litoral Norte e o Recôncavo Sul. Para fins comparativos, utilizaram-se dez amostras provenientes do Estado de São Paulo. Foram empregados os seguintes iniciadores: ASSR20, OSSR9, OSSR17, CSSR4, CSSR12 e CSSR20, dos quais os quatro últimos permitiram identificar 22 loci polimórficos. As populações de X. fastidiosa presentes em citros no Estado da Bahia apresentam elevada diversidade genética, com base nos marcadores SSR, com pools gênicos distintos e agrupamento geográfico. No Litoral Norte, as populações do isolado apresentam maior diversidade... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrus sinensis; Bactéria fitopatogênica; CVC; Haplótipos; Microssatélites. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000100005 |
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| Oliveira,Saulo Alves Santos de; Hohenfeld,Camila Santiago; Santos,Vanderlei da Silva; Haddad,Fernando; Oliveira,Eder Jorge de. |
| The objective of this work was to identify sources of resistance to dry root rot induced by Fusarium sp. in cassava accessions. A macroconidial suspension (20 µL) of 11 Fusarium sp. isolates was inoculated in cassava roots, from 353 acessions plus seven commercial varieties. Ten days after inoculation, the total area colonized by the pathogen on the root pulp was evaluated by digital image analysis. Cluster analysis revealed the presence of five groups regarding resistance. The root lesion areas ranged from 18.28 to 1,096.07 mm² for the accessions BGM 1518 and BGM 556, respectively. The genotypes BGM 1042, BGM 1552, BGM 1586, BGM 1598, and BGM 1692 present the best agronomical traits. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Bioprospection; Germplasm bank; Screening for resistance. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013001000014 |
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| Ribeiro,Lindinéia Rios; Silva,Sebastião de Oliveira e; Oliveira,Saulo Alves Santos de; Amorim,Edson Perito; Serejo,Janay Almeida Santos; Haddad,Fernando. |
| ABSTRACT Fusarium wilt (syn= Panama disease), caused by Fusarium oxysporum f. sp. cubense (FOC), is one of the most destructive diseases of banana, being genetic resistance the main management strategy for this disease. Since the pathogen is constantly evolving to supplant the genetic resistance, new sources of resistance must be investigated by genetic improvement programs aiming to developing new varieties. The objective of the present study was to identify sources of resistance from the different accessions maintained in the banana active germplasm bank (BAGB) at Embrapa Mandioca e Fruticultura. Forty-one BAGB accessions were evaluated, including 17 diploids, 21 triploids, and two tetraploids. The area under the disease progress curve, disease index,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Musa spp.; Panama disease; Varieties; Genetic resistance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000100401 |
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| Boas,Sandielle Araújo Vilas; Oliveira,Saulo Alves Santos de; Bragança,Carlos Augusto Dórea; Ramos,Juliana Barros; Oliveira,Eder Jorge de. |
| ABSTRACT: Although root rot is one of the major diseases affecting Brazilian cassava (Manihot esculenta Crantz.), little is known about the diversity of root rot pathogens. In this study, diseased plants exhibiting root rot symptoms were collected from cassava-producing regions in five Brazilian states: Bahia, Sergipe, Paraíba, Maranhão, Tocantins, and Paraná. Seventy isolates were obtained and assigned to species complexes based on rDNA's ITS (internal transcribed spacer of the ribosomal DNA) region (ITS1, ITS2 and 5.8S). A total of seven species complexes was found belonging to the genus Fusarium (56/74), followed by Lasiodiplodia (8/74), Neoscytalidium (6/74), and Diaporthe/Phomopsis complex (2/74), Phytophthora, and Corallomycetella (1/74 each). These... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; ITS barcode; Phylogeny; Soil-borne diseases. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000100060 |
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| Santiago,Camila Hohenfeld; Santana,Mariana Pereira; Cairo Junior,Luiz Rodriguez; Oliveira,Saulo Alves Santos de; Oliveira,Eder Jorge de. |
| ABSTRACT Cassava root rot diseases such as dry and black root rot are listed among the major threats, since its affect the main product (tuberous roots), causing a progressive decline in yield and affecting subsequent crop cycles, being the use of resistant varieties the most reliable control measure on field level. The objective of this study was to identify inoculation methods for the early evaluation of genotypes, considering the level of resistance to dry (DRR) and black (BRR) root rot diseases. Different methodologies and plant tissues were evaluated, based on the immersion of cassava tissues (roots and stem cuttings), soil infestation, and inoculation of detached tissues (leaves, tuberous roots and stem cuttings). The following parameters were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta Crantz; Fusarium solani; Neoscytalidium hyalinum; Root diseases; Inoculation methods. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000300440 |
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