Population structure of Fusarium oxysporum f. sp. cubense in Brazil
Fusarium wilt, caused by the soil-borne fungus Fusarium oxysporum f. sp. cubense (Foc), is considered one of the most destructive diseases of bananas. Population genetics studies are required for implementing a molecular epidemiology approach, which in turn is fundamental for effective management or...
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| Tipo de documento: | dissertação |
| Estado: | Versão publicada |
| Data de publicação: | 2019 |
| País: | Brasil |
| Recursos: | Universidade Federal de Viçosa (UFV) |
| Repositório: | LOCUS Repositório Institucional da UFV |
| Idioma: | inglês |
| OAI Identifier: | oai:locus.ufv.br:123456789/30080 |
| Acesso em linha: | https://locus.ufv.br//handle/123456789/30080 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Fusariose Banana Fitopatologia |
| Resumo: | Fusarium wilt, caused by the soil-borne fungus Fusarium oxysporum f. sp. cubense (Foc), is considered one of the most destructive diseases of bananas. Population genetics studies are required for implementing a molecular epidemiology approach, which in turn is fundamental for effective management or mitigation actions. In this study, a collection of 200 monosporic isolates from several banana producing regions with different climate conditions along a South to North transect in Brazil was formed to assess the genetic structure of the population of Foc. The VCG of 140 isolates was determined by pairing against 17 VCG testers. A group of 158 isolates was selected for microsatellite genotyping. There was moderate diversity of Foc in Brazil. Eight VCGs were identified: 0120, 0122, 0124, 0125, 0128, 01215, 01220, and 01222. The distribution of VCGs is uneven, independent of the banana genotype and varied according to geographic regions. Four SSR loci were polymorphic and on average 7.5 alleles were detected per locus. Thirty-five MGL were identified. There was no association between VCG and SSR and no genetic structure of the population of Foc in Brazil was detected. Keywords: Panama. Wilt. Banana. |
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