2006
DOI: 10.1590/s0103-90162006000600011
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Sources of resistance to Crinipellis perniciosa in progenies of cacao accessions collected in the Brazilian Amazon

Abstract: The witches' broom disease caused by the fungus Crinipellis perniciosa is the main phytossanitary constraint for cacao production in Brazil. The integrated management of the disease involves resistance as one of the components. The breeding program conducted by the Brazilian Institution, CEPLAC is directed toward the pyramidation of resistance genes from different sources to achieve a more durable resistance. This study aimed to identify sources of resistance in progenies of cacao accessions collected in the b… Show more

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Cited by 28 publications
(25 citation statements)
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“…In contrast, the progenies RB36 x SCA6, RB36 x SCA12, CSUL3 x SCA6 and CEPEC86 x SCA6demonstrated lower incidence of WB over the years, when compared with the progenies mentioned above, possibly due to the contribution of the other parent, whose resistance genes hindered the infection by the pathogen. Paim et al (2006) found behavioral changes for the progenies SCA6 and SCA12 in relation to the increase in the incidence of WB in Cepec areas, from 2004, which was also observed in other areas of Cepec. This fact evidenced the evolutionary process of the pathogen with the increase in the pathogen population of types, which were more aggressive to SCA clones.…”
Section: Cs Benjamin Et Alsupporting
confidence: 60%
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“…In contrast, the progenies RB36 x SCA6, RB36 x SCA12, CSUL3 x SCA6 and CEPEC86 x SCA6demonstrated lower incidence of WB over the years, when compared with the progenies mentioned above, possibly due to the contribution of the other parent, whose resistance genes hindered the infection by the pathogen. Paim et al (2006) found behavioral changes for the progenies SCA6 and SCA12 in relation to the increase in the incidence of WB in Cepec areas, from 2004, which was also observed in other areas of Cepec. This fact evidenced the evolutionary process of the pathogen with the increase in the pathogen population of types, which were more aggressive to SCA clones.…”
Section: Cs Benjamin Et Alsupporting
confidence: 60%
“…In the early twenty-first century, it was detected pathogen variations in cacao populations of Bahia, evidencing the need to expand the resistance sources within the PMGC (Paim et al 2006). …”
Section: Cs Benjamin Et Almentioning
confidence: 99%
“…Similarly, changes in the performance of progeny Scavina were also observed in experimental areas of CEPEC (Paim et al 2006) as well as on several farms in different municipalities of the region.…”
Section: Resultsmentioning
confidence: 59%
“…However, despite repeated releases of plant material with resistance and high yield, the descendants of Scavina clones still predominate as the main sources of resistance in Brazil, as well as in other producing countries (Lopes et al 2011). Unfortunately, in some of these sources, even in the Scavinas descendants, the disease incidence has increased significantly since 2003 (Paim et al 2006), due to pathogen adaptation (Gramacho et al 2008). Thus, the Cacao breeding program of CEPLAC-CEPEC has introduced new genotypes carrying WBD-resistant genes from different sources to increase resistance durability in the cultivated areas, hampering pathogen adaptation and increasing the frequency of the most aggressive types (Gramacho et al 2008).…”
Section: Introductionmentioning
confidence: 99%
“…The introduction of witches' broom disease into cocoa producing areas of South America and Caribbean has devastated the chocolate industry [6]. The ultimate method of witches' broom control [7] will be through genetic resistance, therefore the resistance source "Scavina 6" is not doing very well in field conditions, leading to fungi resistant strains [8] [9]. Moniliophthora perniciosa is a hemibiotrophic pathogen, with contrasting mycelial morphology and behavior during the biotrophic and necrotrophic phases [5] Its biotrophic phase starts with the germination of a basidiospore, apoplast colonization with no specific infection structure [10].…”
Section: Introductionmentioning
confidence: 99%