Resistance to Fusarium dry root rot disease in cassava accessions

Pesquisa Agropecuária Brasileira

Saulo Alves Santos De Oliveira²  Camila Santiago Hohenfeld¹  Vanderlei Da Silva Santos²  Fernando Haddad²  Eder Jorge De Oliveira² 

[1],Embrapa Mandioca e FruticulturaCruz das Almas BA ,Brazil

关键词: Manihot esculenta;    bioprospection;    germplasm bank;    screening for resistance;    Manihot esculenta;    bioprospecção;    banco de germoplasma;    seleção para resistência;   

DOI  :  10.1590/S0100-204X2013001000014

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
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