SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Association mapping in common bean revealed regions associated with Anthracnose and Angular Leaf Spot resistance.

NAY, M. M.; SOUZA, T. L. P. O.; RAATZ, B.; MUKANKUSI, C. M.; GONÇALVES-VIDIGAL, M. C.; ABREU, A. F. B.; MELO, L. C.; PASTOR-CORRALES, M. A..

Angular leaf spot (ALS), caused by Pseudocer-cospora griseola, is one of the most devastating diseases of common bean (Phaseolus vulgarisL.) in tropical and subtropical production areas. Breeding for ALS resistance is difficult due to the extensive virulence diversity of P. griseolaand the recurrent appearance of new virulent races. Five major loci, Phg-1 to Phg-5, confer-ring ALS resistance have been named, and markers tightly linked to these loci have been reported. Quantitative trait loci (QTLs) have also been described, but the validation of some QTLs is still pending. The Phg-1, Phg-4, and Phg-5loci are from common bean cultivars of the Andean gene pool, whereas Phg-2 and Phg-3are from beans of the Mesoamerican gene pool. The reference genome of...

Tipo: Artigo de periódico

Palavras-chave: Feijão; Phaseolus Vulgaris; Melhoramento Genético Vegetal; Doença de Planta; Beans; Pseudocercospora; Leaf spot; Plant breeding; Diseases and disorders (animals and humans).

Ano: 2019

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1111553

BRS Sublime - Common bean cultivar with carioca grain, resistance to angular leaf spot and high nutritional quality.

FRITSCHE-NETO, R.; SOUZA, T. L. P. O. de; PEREIRA, H. S.; FARIA, L. C. de; MELO, L. C.; NOVAES, E.; BRUM, I. J. B.; JANNINK, J-L..

Despite important biotic stresses to common bean, Anthracnose (ANT) and Angular Leaf Spot (ALS) can cause losses of up to 80 % and occur in more than 60 countries around the world. Genetic resistance is the most sustainable strategy to manage these diseases. Thus, we aimed to (1) identify new SNP markers associated with ALS and ANT resistance loci in elite common bean lines, and (2) provide a functional characterization of the DNA sequences containing the identified SNP markers. We evaluated 60 inbred lines, under field conditions, which represent the elite germplasm developed by the Embrapa common bean breeding program across 22 years, in terms of severity of the ALS and ANT. The lines were genotyped with 5,398 SNPs. Then, a Mixed Linear Model was run to...

Tipo: Artigo de periódico

Palavras-chave: Feijão; Phaseolus Vulgaris; Antracnose; Resistência; Mancha Angular; Anthracnose; Beans; Colletotrichum lindemuthianum virus; Pseudocercospora; Disease resistance; Marker-assisted selection.

Ano: 2019

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1111232

Etiología de un síndrome fungoso y viral en cladodios de nopal verdura (Opuntia ficus-indica).

WENDLAND, A.; PEREIRA, H. S.; FARIA, L. C. de; SOUZA, T. L. P. O.; DEL PELOSO, M. J.; COSTA, J. G. C. da; CABRERA DIAZ, J. L.; MAGALDI, M. C. de S.; ALMEIDA, V. M. de; CARVALHO, H. W. L. de; MELO, C. L. P. de; COSTA, A. F. da; ABREU, A. de F. B.; MELO, L. C..

BRS Sublime is a common bean cultivar with carioca grains, high nutritional grain quality, and high yield potential (4667 kg ha-1). It has a normal cycle, upright growth, low loss rates in the mechanical harvest, and is recommended for planting in 19 Brazilian states, in the three main common bean cultivation regions. It is the first cultivar developed in the world with angular leaf spot resistance.

Tipo: Artigo de periódico

Palavras-chave: Phaseolus Vulgaris; Variedade Resistente; Mancha Angular; Qualidade; Eficiência Nutricional; Melhoramento Genético Vegetal; Beans; Pseudocercospora; Genetic improvement; Plant breeding; Plant diseases and disorders..

Ano: 2018

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1100109

Colegio de Postgraduados

Alonso Barrera, Berenice.

El cultivo de nopal (Opuntia ficus-indica) presenta diversas enfermedades de importancia económica asociadas a hongos y virus. Los objetivos de esta investigación fueron: a) detectar la ocurrencia de infecciones latentes del agente causal de la mancha negra, Pseudocercospora opuntiae (Po), mediante estudios histológicos y evaluar la implicación sinergética de Colletotrichum sp. (C) en la infección de P.opuntiae, y b) demostrar la naturaleza etiológica viral asociada a manchas cloróticas anulares en nopal. Con respecto al primer objetivo se evaluaron 31200 cortes histológicos provenientes de 78 cladodios sintomáticos colectados en siete fechas de muestreo comprendido en el periodo, junio-agosto, caracterizado por alta incidencia de mancha negra....

Palavras-chave: Pseudocercospora; Colletotrichum; Virus; Infección latente; Sinergismo; Maestría; Fitopatología.

Ano: 2011

URL: http://hdl.handle.net/10521/525

Etiología de un síndrome fungoso y viral en cladodios de nopal verdura (Opuntia ficus-indica).

Colegio de Postgraduados

Alonso Barrera, Berenice.

Palavras-chave: Pseudocercospora; Colletotrichum; Virus; Infección latente; Sinergismo; Maestría; Fitopatología.

Ano: 2011

URL: http://hdl.handle.net/10521/525

Microcyclospora and Microcyclosporella: novel genera accommodating epiphytic fungi causing sooty blotch on apple

Frank, J.; Crous, P.W.; Groenewald, J.Z.; Oertel, B.; Hyde, K.D.; Phengsintham, P.; Schroers, H.-J..

Recent studies have found a wide range of ascomycetes to be associated with sooty blotch and flyspeck (SBFS) blemishes on the surfaces of pomaceous fruits, specifically apples. Based on collections of such fungi from apple orchards in Germany and Slovenia we introduce two novel genera according to analyses of morphological characters and nuclear ribosomal DNA sequences (large subunit and internal transcribed spacer regions). Microcyclosporella is represented by a single species, M. mali, and is presently known from Germany and Slovenia. Microcyclosporella is Pseudocercosporella-like in morphology, but genetically and morphologically distinct from Pseudocercosporella s.str., for which an epitype is designated based on a fresh collection of P. bakeri from...

Novel species of Mycosphaerellaceae and Teratosphaeriaceae

Palavras-chave: Devriesia; Hyphomycetes; Malus; Microfungi; Pseudocercospora; Pseudocercosporella; SBFS; Taxonomy.

Ano: 2010

URL: http://www.repository.naturalis.nl/record/532077

Crous, P.W.; Summerell, B.A.; Carnegie, A.J.; Wingfield, M.J.; Groenewald, J.Z..

Recent phylogenetic studies based on multi-gene data have provided compelling evidence that the Mycosphaerellaceae and Teratosphaeriaceae represent numerous genera, many of which can be distinguished based on their anamorph morphology. The present study represents the second contribution in a series describing several novel species in different capnodealean genera defined in a previous study. Novelties on Eucalyptus from Australia include: Penidiella pseudotasmaniensis, P. tenuiramis, Phaeothecoidea intermedia, P. minutispora, Pseudocercospora tereticornis, Readeriella angustia, R. eucalyptigena, R. menaiensis, R. pseudocallista, R. tasmanica, Teratosphaeria alboconidia, T. complicata, T. majorizuluensis, T. miniata, T. profusa, Zasmidium aerohyalinosporum...

Phenotyping for angular leaf spot severity and its implication in breeding common bean for resistance.

Palavras-chave: Mycosphaerella; Penidiella; Phaeophleospora; Phaeothecoidea; Pseudocercospora; Readeriella; Teratosphaeria; Zasmidium.

Ano: 2009

URL: http://www.repository.naturalis.nl/record/532086

Species of Mycosphaerella and related anamorphs on Eucalyptus leaves from Thailand

PEREIRA, R.; ABREU, A. de F. B.; NALIN, R. S.; SOUZA, E. A. de.

Phenotyping for severity of angular leaf spot (ALS) in common bean is important to identify new sources of resistance and select progenies in conventional and molecular marker-assisted breeding. In this study, three phenotyping methods for ALS severity were assessed and its implications in breeding for resistance to Pseudocercospora griseola are discussed. Reaction of 144 common bean lines to P. griseola was evaluated. Three different experiments were conducted in the greenhouse (V2 and V3 stages) and in the field. Common bean lines were inoculated with a mixture of spores of pathogen races 63-63 and 63-23. We observed that 31 %, 7 % and 10 % of lines were resistant in stages V2, V3 and in the field, respectively. Estimates of coincidence index V2-V3,...

Tipo: Artigo de periódico

Palavras-chave: Pseudocercospora griseola; Feijão; Phaseolus Vulgaris; Resistência Genética; Inoculação Artificial; Melhoramento Genético Vegetal; Beans; Genetic resistance; Inoculation methods; Pseudocercospora; Plant breeding.

Ano: 2019

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121768

Crous, R. Cheewangkoon: P.W.; Hyde, K.D.; Groenewald, J.Z.; To-anan, C..

Species of Mycosphaerella and their related anamorphs represent potentially serious foliar pathogens of Eucalyptus. The fungi treated in the present study were isolated from symptomatic Eucalyptus leaves collected in Thailand during June –October 2007. Species were initially identified based on morphological and cultural characteristics. Identifications were confirmed using comparisons of DNA sequence data of the internal transcribed spacers (ITS1, 5.8S nrDNA, ITS2) and the 28S nrDNA (LSU) regions. To help distinguish species of Pseudocercospora, the dataset was expanded by generating partial sequences of the translation elongation factor 1-α and actin genes. By integrating the morphological and molecular datasets, five new taxa were distinguished, namely...

Unravelling Mycosphaerella: do you believe in genera?

Palavras-chave: Eucalyptus; Mycosphaerella; Mycosphaerella leaf disease; Penidiella; Pseudocercospora; Taxonomy.

Ano: 2008

URL: http://www.repository.naturalis.nl/record/532327

Crous, P.W.; Summerell, B.A.; Carnegie, A.J.; Wingfield, M.J.; Hunter, G.C.; Burgess, T.I.; Andjic, V.; P.A. Barber; J.Z. Groenewald.

Many fungal genera have been defined based on single characters considered to be informative at the generic level. In addition, many unrelated taxa have been aggregated in genera because they shared apparently similar morphological characters arising from adaptation to similar niches and convergent evolution. This problem is aptly illustrated in Mycosphaerella. In its broadest definition, this genus of mainly leaf infecting fungi incorporates more than 30 form genera that share similar phenotypic characters mostly associated with structures produced on plant tissue or in culture. DNA sequence data derived from the LSU gene in the present study distinguish several clades and families in what has hitherto been considered to represent the Mycosphaerellaceae....