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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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| Ferreira,Mileide dos Santos; Moura,Érica Rodrigues de; Lino,Lucymeire Souza Morais; Amorim,Edson Perito; Santos-Serejo,Janay Almeida dos; Haddad,Fernando. |
| Abstract The banana tree is one of the most cultivated fruit globally; however, some diseases significantly affect its production, such as Fusarium wilt. The most appropriate measure for controlling this disease in areas with inoculum pressure is the use of resistant cultivars. Therefore, this study aimed to generate banana somaclones of the cultivar ‘Prata-Anã’ resistant to Fusarium wilt by inducing somaclonal variation. ‘Prata-Anã’ stem apexes were established in vitro in MS culture medium and, on a monthly basis, subcultivated in AIA and adenine sulfate supplemented MS medium with added plant regulators: 6-benzylaminopurine (BAP, 4 ml L-1), Thidiazuron (TDZ, 1 ml L-1), and Paclobutrazol (PBZ, 10 ml L-1). The treatments were: T0: no regulator, T1: BAP,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biotechnology; Tissue culture; Musa sp.; Somaclonal variations; Fusarium wilt. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000600101 |
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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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| Haddad,Fernando; Maffia,Luiz A.; Mizubuti,Eduardo S. G.. |
| A antracnose foliar causada por Colletotrichum gloeosporioides é a doença mais importante da cebolicultura (Allium cepae) em Guidoval e Guiricema, MG. Para controle da doença, utilizam-se intensivamente fungicidas, principalmente benomil (Ben), o que tem sido pouco efetivo. Neste trabalho, testou-se a hipótese da existência de isolados de C. gloeosporioides resistentes ao Ben e se comparou a eficiência de diferentes fungicidas no controle do patógeno. Nas concentrações testadas, Ben impediu o crescimento micelial do fungo, e a germinação de conídios decresceu com o aumento da concentração do produto. Independente do isolado do patógeno e da concentração dos fungicidas, ocorreu maior inibição da germinação com Tiofanato metílico (Tm) + Mancozeb (Man), Man,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Controle químico; Manejo; Allium cepa. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582003000400016 |
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