2013
DOI: 10.1590/s0100-204x2013001000014
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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 1… Show more

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Cited by 16 publications
(27 citation statements)
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“…The severity of the symptoms (lesioned area) ranged from 1 to 2.043 mm 2 , though it is possible to report the presence of different degrees of resistance between the curated germplasm and commercial varieties. The same difference among cassava curated germplasms have been observed in other studies (Oliveira et al 2013;Vilas Boas et al 2017), as well as differences in aggressiveness of root rot pathogens within genotypes (Oliveira et al 2017).…”
Section: Discussionsupporting
confidence: 83%
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“…The severity of the symptoms (lesioned area) ranged from 1 to 2.043 mm 2 , though it is possible to report the presence of different degrees of resistance between the curated germplasm and commercial varieties. The same difference among cassava curated germplasms have been observed in other studies (Oliveira et al 2013;Vilas Boas et al 2017), as well as differences in aggressiveness of root rot pathogens within genotypes (Oliveira et al 2017).…”
Section: Discussionsupporting
confidence: 83%
“…and P. melonis, its root yield is high. 'BRS Kiriris' is considered resistant under field conditions (Fukuda et al 2002) and was reported as moderately resistant to dry root rot when inoculated under controlled conditions (Oliveira et al 2013…”
Section: Discussionmentioning
confidence: 99%
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“…For each temperature, 14 fungi isolates were used, with 12 root slices per isolate within each plot (temperature), in a total of 840 experimental units. The evaluations were performed five days after inoculation to measure the lesioned area using the digital analysis of the images with the aid of the ImageTool software (Oliveira et al 2013).…”
Section: Aggressiveness Bioassaymentioning
confidence: 99%
“…Differential responses of root rot severity were observed in the different genotypes and also in different parts of the root (peel and pulp). Oliveira et al (2013) also reported the possibility of different levels of resistance among cassava genotypes associated with different levels of Fusarium aggressiveness. When studying the prevalence and severity of root rot pathogens in cassava in West Africa, Banito et al (2010) also verified differentiated reactions when the pathogens were inoculated in roots and stems.…”
Section: Severity and Genetics Of The Resistance To Cassava Root Rotmentioning
confidence: 98%