Resistance to Fusarium dry root rot disease in cassava accessions

Authors

  • Saulo Alves Santos de Oliveira Embrapa Mandioca e Fruticultura
  • Camila Santiago Hohenfeld Universidade Federal do Recôncavo da Bahia
  • Vanderlei da Silva Santos Embrapa Mandioca e Fruticultura
  • Fernando Haddad Embrapa Mandioca e Fruticultura
  • Eder Jorge de Oliveira Embrapa Mandioca e Fruticultura

DOI:

https://doi.org/10.1590/S1678-3921.pab2013.v48.16957

Keywords:

Manihot esculenta, bioprospection, germplasm bank, screening for resistance

Abstract

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.

Author Biography

Saulo Alves Santos de Oliveira, Embrapa Mandioca e Fruticultura

Núcleo de Recursos Genéticos de Desenvolvimento de Variedades

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Published

2013-12-20

How to Cite

Oliveira, S. A. S. de, Hohenfeld, C. S., Santos, V. da S., Haddad, F., & Oliveira, E. J. de. (2013). Resistance to <i>Fusarium</i> dry root rot disease in cassava accessions. Pesquisa Agropecuaria Brasileira, 48(10), 1414–1417. https://doi.org/10.1590/S1678-3921.pab2013.v48.16957

Issue

v.48, n.10, out. 2013

Section

SCIENTIFIC NOTES