Incompatibilidade somática em Rhizoctonia solani AG-1 IA da soja

Campos, Ana Paula da Silva de; Ceresini, Paulo Cézar

doi:10.1590/s0100-54052006000300006

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…Our results show some similarities to studies conducted on populations of R. solani AG-3 from potato and tobacco hosts (Ceresini et al 2002) and populations of AG-1-IA from soybeans (Campos and Ceresini 2006) where few or no clones (sharing both somatic compatibility and molecular marker phenotype) were identified. Also the range of incompatibility varied in intensity from "weak" clear demarcation to raised hyphae in the contact zone between paired isolates.…”

Section: Discussionsupporting

confidence: 83%

“…DNA fingerprinting complemented with another independent criteria such as mycelial compatibility pattern has been suggested for providing preliminary information on mating system and genetic structure of R. solani (Cubeta and Vilgalys 1997;Vilgalys and Cubeta 1994). The clonal composition, defined as where two or more isolates are somatically compatible and share the same DNA marker phenotype, has been examined in field populations of AG-3 and AG-1-IA (Campos and Ceresini 2006;Ceresini et al 2002).…”

Section: Introductionmentioning

confidence: 99%

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Assessing genetic diversity in the web blight pathogen Thanatephorus cucumeris (anamorph = Rhizoctonia solani) subgroups AG-1-IE and AG-1-IF with molecular markers

Godoy‐Lutz

Steadman

et al. 2012

J Gen Plant Pathol

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genetic diversity in the web blight pathogen Thanatephorus cucumeris (anamorph = Rhizoctonia solani) subgroups AG-1-IE and AG-1-IF with molecular markers" (2012). Papers in Plant Pathology. 273. http://digitalcommons.unl.edu/plantpathpapers/273 Abstract Web blight, an important foliar disease of dry beans in the Americas, is a challenge to manage. We studied genetic variation of 92 isolates of Rhizoctonia solani subgroups AG-1-IE and AG-1-IF using DNA fingerprinting methods and mycelial compatibility grouping. The isolates were collected over 13 years from bean fields in the Dominican Republic, Honduras and Puerto Rico. Cluster and AMOVA analysis of combined data from two universal rice primers and two internal sequence repeats revealed significant genetic variation among and within populations of both subgroups. Variation was influenced by geographic origin and sampling year for AG-1-IE isolates and geographic origin for AG-1-IF isolates. Mycelial compatibility of paired isolates was mostly scored as incompatible in both subgroups and supported many unique phenotypes. Only two isolates of AG-1-IE displayed mycelial compatibility and DNA fingerprints, suggesting clonal origin. Genetic variation in these AG-1-IE and AG-1-IF isolate populations may explain the lack of durable resistance to web blight reported in dry beans.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Assessing genetic diversity in the web blight pathogen Thanatephorus cucumeris (anamorph = Rhizoctonia solani) subgroups AG-1-IE and AG-1-IF with molecular markers

Godoy‐Lutz

Steadman

et al. 2012

J Gen Plant Pathol

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show abstract

“…There was evidence for an expressive clonal component in this population of the pathogen. About 37% of the isolates of R. solani AG-1 IA were probable clones (Campos and Ceresini, 2005). However, the deviations of the strict association between the somatically compatible groups and the RAPD groups observed are consistent with recombination.…”

Section: Introductionmentioning

confidence: 80%

“…As an example, M. oryzea and M. grisea, which are two distinct phylogenetic and biological species, have no detectable morphological differences between them. In the case of R. solani AG-1 IA, although no differences in pathogenicity were detected between the soybean and rice groups of the pathogen, there was clear indication that the distinct rDNA haplotypes are already distinct in terms of somatic compatibility grouping and RAPD genotyping (Fenille et al, 2002;Campos and Ceresini, 2005). No information is available concerning differences in virulence.…”

Section: Discussionmentioning

confidence: 97%

Intraspecific Evolution of Rhizoctonia solani AG-1 IA Associated with Soybean and Rice in Brazil based on Polymorphisms at the ITS-5.8S rDNA Operon

et al. 2005

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Rhizoctonia solani AG-1 IA causes leaf blight on soybean and rice. Despite the fact that R. solani AG-1 IA is a major pathogen affecting soybean and rice in Brazil and elsewhere in the world, little information is available on its genetic diversity and evolution. This study was an attempt to reveal the origin, and the patterns of movement and amplification of epidemiologically significant genotypes of R. solani AG-1 IA from soybean and rice in Brazil. For inferring intraspecific evolution of R. solani AG-1 IA sampled from soybean and rice, networks of ITS-5.8S rDNA sequencing haplotypes were built using the statistical parsimony algorithm from Clement et al. (2000) Molecular Ecology 9: 1657-1660. Higher haplotype diversity (Nei M 1987, Molecular Evolutionary Genetics Columbia University Press, New york: 512p.) was observed for the Brazilian soybean sample of R. solani AG-1 IA (0.827) in comparison with the rest of the world sample (0.431). Within the south-central American clade (3-2), four haplotypes of R. solani AG-1 IA from Mato Grosso, one from Tocantins, one from Maranha˜o, and one from Cuba occupied the tips of the network, indicating recent origin. The putative ancestral haplotypes had probably originated either from Mato Grosso or Maranha˜o States. While 16 distinct haplotypes were found in a sample of 32 soybean isolates of the pathogen, the entire rice sample (n=20) was represented by a single haplotype (haplotype 5), with a worldwide distribution. The results from nested-cladistic analysis indicated restricted gene flow with isolation by distance (or restricted dispersal by distance in nonsexual species) for the south-central American clade (3-2), mainly composed by soybean haplotypes.

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“…This indicates that ITS sequences can be used as a molecular tool for early identification of R. solani anastomosis groups. In studies using the morphological method, it became evident that somatic incompatibility occurs between isolates from the same anastomosis group (Campos and Ceresini 2006).…”

mentioning

confidence: 99%

Rhizoctonia solani AG 1-IB and AG 4 HG-I causing leaf blight and root rot in plants from the Lamiaceae family in Brazil

Melo

Cabral

Reis

et al. 2017

Trop. plant pathol.

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Rhizoctonia solani is a fungal complex represented by 14 anastomosis groups. Each group has distinct characteristics that are reflected in the management and control strategies for diseases caused by this fungus. In three distinct geographical regions, plants of the Lamiaceae family from vegetable and medicinal herb gardens were observed, with Mentha piperina, Mentha spicata and Origanum manjerona presenting symptoms of leaf blight and Ocimum basilicum, Ocimum vulgare and Rosmarinus officinalis presenting root rot symptoms. Mycelia, hymenia, basidiospores and microsclerotia were found on the stems and leaves of Mentha piperina and Mentha spicata. These are typical morphological markers of the genus Rhizoctonia. The ITS region was amplified for nine isolates and subsequently sequenced. In the phylogenetic analysis, the isolates were identified as Rhizoctonia solani belonging to AG 1-IB and AG 4 HG-I anastomosis groups. All isolates inoculated in their respective hosts caused disease symptoms resembling those typically observed in the field. This is the first report of R. solani AG 1-IB in M. spicata, M. piperina and Origanum majorana and of R. solani AG 4 HG-I in O. vulgare, R. officinalis and O. basilicum in Brazil.

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Incompatibilidade somática em Rhizoctonia solani AG-1 IA da soja

Cited by 6 publications

References 23 publications

Assessing genetic diversity in the web blight pathogen Thanatephorus cucumeris (anamorph = Rhizoctonia solani) subgroups AG-1-IE and AG-1-IF with molecular markers

Assessing genetic diversity in the web blight pathogen Thanatephorus cucumeris (anamorph = Rhizoctonia solani) subgroups AG-1-IE and AG-1-IF with molecular markers

Intraspecific Evolution of Rhizoctonia solani AG-1 IA Associated with Soybean and Rice in Brazil based on Polymorphisms at the ITS-5.8S rDNA Operon

Rhizoctonia solani AG 1-IB and AG 4 HG-I causing leaf blight and root rot in plants from the Lamiaceae family in Brazil

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