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BRSMG Camaleão: new mungbean cultivar with large, shiny, green seeds
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Vieira, Rogério Faria

; Carneiro, José Eustáquio de Souza

; Paula Júnior, Trazilbo José de

; Lima, Renan Cardoso

; Soares, Bruno de Almeida

; Teixeira, Pablo Henrique

; Santos, Davi Moreira

; Jacoob, Luciano Luis

Crop Breeding and Applied Biotechnology

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2022, Volumen 22 Nº 2 elocation e32732227

Resumen: En | Texto: En | PDF: En

Abstract ‘BRMGS Camaleão’ is a mungbean cultivar with large, shiny, green seeds released for the state of Minas Gerais, Brazil. It was developed by the Asian Vegetable Research and Development Center as line VC 6148-B-16. In seven trials established in the Zona da Mata region, it had an average yield of 1493 kg ha-1 and 1000-seed weight of 68-78 g.

https://doi.org/10.1590/1984-70332022v22n2c17

Split application of molybdic fertilizer at the reproductive stage of common bean increases the molybdenum content in seed
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Vieira, Rogério Faria

; Lima, Renan Cardoso

; Prado, Adalgisa Leles do

; Paula Júnior, Trazilbo José de

; Soares, Bruno de Almeida

Acta Scientiarum. Agronomy

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Dic 2016, Volumen 38 Nº 4 Paginas 529 - 533

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO. Avaliamos os efeitos de parcelamentos da aplicação de molibdênio (Mo) na fase reprodutiva do feijão-comum no conteúdo de Mo na semente (CMoS) e na sua qualidade fisiológica em dois ensaios na Zona da Mata, Minas Gerais. Pulverizaram-se feijoeiros com 100 ou 600 g Mo ha-1 na fase V4. Esta última dose também foi parcelada: 100(V4)+500(R5), 100(V4)+500(R7), 100(V4)+250(R5)+250(R7) e 100(V4)+150(R5)+350(R7). O CMoS de plantas pulverizadas com 600 g (cinco tratamentos) foi 3,7 ou 62 vezes maior que o das pulverizadas com 100 g; sementes deste tratamento apresentaram qualidade ligeiramente melhor que as daqueles. Aplicação de 100 g em V4 + 500 g na fase reprodutiva (quatro tratamentos) aumentou 1,6 ou 2,7 vezes o CMoS comparativamente ao CMoS de plantas adubadas com 600 g em V4. Parcelamento de 500 g em duas pulverizações aumentou em 11% (p = 0,257) ou 16% (p = 0,013) o CMoS comparativamente a uma pulverização. O CMoS pode ser mais alto quando se pulveriza o Mo em R7 (formação de vagens) comparativamente a R5 (pré-floração), sem prejuízo à qualidade da semente. Logo, o parcelamento do Mo nessas duas fases do feijão-comum economiza fertilizante molíbdico para produzir sementes ricas em Mo, com ligeira redução da qualidade da semente.

ABSTRACT. We evaluated the effects of split molybdenum (Mo) application at the reproductive stage of the common bean on seed Mo content (SMoC) and seed quality in two trials in the Zona da Mata region, Minas Gerais. Plants were sprayed with 100 or 600 g Mo ha-1 at the V4 stage. The higher dose was also split into 100(V4)+500(R5), 100(V4)+500(R7), 100(V4)+250(R5)+250(R7), and 100(V4)+150(R5)+350(R7). SMoC from plants sprayed with 600 g (five treatments) was 3.7- or 62-fold higher than those sprayed with 100 g, with seeds from the former treatments exhibiting slightly poorer quality. Application of 100 g at V4 + 500 g at the reproductive stage (four treatments) increased SMoC 1.6- or 2.7-fold compared with SMoC from plants sprayed with 600 g at V4. Split application of 500 g with two sprays increased SMoC by 11% (p = 0.257) or 16% (p = 0.013) compared with one spray of 500 g. SMoC can be higher with Mo applied at R7 (pod formation) instead of at R5 (pre-flowering), without impairing seed quality. Thus, split Mo application between the R5 and R7 stages of the common bean saves molybdic fertilizer to produce Mo-rich seeds, with only a slight decrease in seed quality.

https://doi.org/10.4025/actasciagron.v38i4.30536 924 descargas

Resistance to Fusarium wilt in common bean
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Batista, Renata Oliveira

; Oliveira, Ana Maria Cruz e

; Silva, Johnn Lennon Oliveira

; Nicoli, Alessandro

; Carneiro, Pedro Crescêncio Sousa

; Carneiro, José Eustáquio de Sousa

; Paula Júnior, Trazilbo José de

; Queiroz, Marisa Vieira de

Crop Breeding and Applied Biotechnology

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Sep 2016, Volumen 16 Nº 3 Paginas 226 - 233

Resumen: En | Texto: En | PDF: En

Abstract In breeding programs, understanding the potential of parents should be a way to spend significantly less time and costs to obtain new cultivars. For this, the objective of this study was to estimate the general and specific combining ability of parents aiming common bean breeding for resistance to Fusarium wilt (FW) based on disease severity and reduction in plant growth. Eight common bean genotypes were crossed in a 3 x 5 partial diallel mating scheme to obtain F1 hybrids. The parents and their 15 F1 hybrids were evaluated for severity of Fusarium wilt, area under the disease progress curve, percentage of plant height reduction and plant shoot fresh weight reduction and grain yield. The resistance of common bean to FW is controlled by a few dominant genes. The reduction in plant growth is controlled by a different set of genes that can increase the selection efficiency of parents for common bean breeding.

https://doi.org/10.1590/1984-70332016v16n3a34 1804 descargas

BRSMG Uai: common bean cultivar with carioca grain type and upright plant architecture
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Ramalho, Magno Antonio Patto

; Abreu, Ângela de Fátima Barbosa

; Carneiro, José Eustáquio de Souza

; Melo, Leonardo Cunha

; Paula Júnior, Trazilbo José de

; Pereira, Helton Santos

; Peloso, Maria José Del

; Pereira Filho, Israel Alexandre

; Martins, Maurício

; Giúdice, Marcos Paiva Del

; Vieira, Rogério Faria

Crop Breeding and Applied Biotechnology

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Sep 2016, Volumen 16 Nº 3 Paginas 261 - 264

Resumen: En | Texto: En | PDF: En

Abstract The common bean cultivar with carioca grain type, BRSMG Uai, is recommended for cultivation in Minas Gerais and stands out for its upright plant architecture, which facilitates cultivation and mechanical harvesting. This cultivar has high yield potential and is resistant to the major races of anthracnose that occur in region.

https://doi.org/10.1590/1984-70332016v16n3c40 918 descargas

Reaction of sources of resistance to white mold to microsatellite haplotypes of Sclerotinia sclerotiorum
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Lehner, Miller da Silva

; Paula Júnior, Trazilbo José de

; Vieira, Rogério Faria

; Lima, Renan Cardoso

; Soares, Bruno de Almeida

; Silva, Rhaphael Alves

Scientia Agricola

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Abr 2016, Volumen 73 Nº 2 Paginas 184 - 188

Resumen: En | Texto: En | PDF: En

ABSTRACT White mold caused by the fungus Sclerotinia sclerotiorum is the most yield-limiting disease of common bean in Brazil. To date, there has been no commercial cultivar resistant to this disease. In a greenhouse we evaluated white mold resistance sources (Cornell 605, A195 and G122) against eight isolates of S. sclerotiorum from five Brazilian states. A Brazilian cultivar (BRSMG Madrepérola) and a susceptible check (Beryl) were used as control. Treatments were arranged in factorial combinations (5 × 8) in a completely random design with four replicates. Disease severity was assessed on a rating scale of 1-to-9 together with lesion length, which was used to determine an area under the disease progress curve (AUDPC). Polymorphisms detected in ten microsatellite loci were used to assess variability between the isolates. Each isolate was a distinct haplotype; they formed a genetic tree with two clusters. One cluster was formed by three isolates collected from the states of Minas Gerais and São Paulo (southeastern); the others, by isolates from Paraná, Santa Catarina (southern), Goiás (Mid-western), and again, Minas Gerais. Genotype × isolate interaction was significant. In general, Beryl was more susceptible than BRSMG Madrepérola. Considering the AUDPC and/or the white mold reaction score, Cornell 605 exhibited more physiological resistance than BRSMG Madrepérola to seven isolates, A195 to five isolates, and G122 to two isolates. Our results suggest that Cornell 605 is the best source of resistance to white mold for the southern region, whereas Cornell 605 and A195 are somewhat superior to G122 for the southeastern and mid-western regions.

https://doi.org/10.1590/0103-9016-2015-0085 1445 descargas

A aplicação foliar de molibdênio na fase de enchimento de vagens do feijão-comum pode reduzir a qualidade da semente
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Vieira, Rogério Faria

; Paula Júnior, Trazilbo José de

; Prado, Adalgisa Leles do

; Araújo, Roberto Fontes

; Lehner, Miller da Silva

; Silva, Rhaphael Alves

Revista Ceres

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Ago 2015, Volumen 62 Nº 4 Paginas 415 - 419

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Com o objetivo de aprimorar a tecnologia de produção de sementes ricas em molibdênio (Mo), foram avaliados os efeitos da aplicação foliar de 600 g ha-1 de Mo na qualidade fisiológica da semente de feijão. Em campo, essa dose de Mo foi aplicada na fase V4 (terceira folha trifoliolada), ou parcelada de duas a quatro vezes e aplicada em V4, R6 (floração), R7 e, ou, R8 (enchimento de vagens). A aplicação de 300 g ha-1 de Mo em R6 não influenciou a qualidade da semente, em comparação com a do controle (90 g ha-1 de Mo aplicado em V4). Dos três tratamentos em que 200, 255 ou 300 g ha-1 de Mo foram aplicados em R7, apenas com 255 g ha-1 o Mo reduziu a germinação e vigor das sementes, em comparação com as do controle. Quando 200, 255 ou 300 g ha-1 de Mo foram aplicados em R8 (cinco tratamentos), geralmente o Mo reduziu a germinação e, em dois casos, também o vigor das sementes, em comparação com os do controle. Concluiu-se que 255 g ha-1 de Mo aplicado em R7 e, sobretudo, doses iguais ou mais altas que 200 g ha-1 de Mo aplicadas em R8 podem reduzir a qualidade fisiológica da semente de feijão.

Aiming to improve the technology of producing seed with high Mo content, the effects of 600 g ha-1 of foliar-applied Mo on common bean seed quality were evaluated. In the field, this Mo rate was applied at the V4 growth stage (third trifoliolate leave) or divided into two or four rates applied at V4, R6 (flowering), R7 and/or R8 (pod filling). Mo (300 g ha-1) applied at R6 did not affect seed quality relative to control (90 g ha-1 of Mo applied at V4). In the three treatments in which 200, 255 or 300 g ha-1 of Mo were applied at R7, only in one (255 g ha-1) Mo decreased seed germination and vigor relative to control. When 200, 255 or 300 g ha-1 of Mo were applied at R8 (five treatments), in general, Mo decreased seed germination and, in two cases, also seed vigor relative to control. It was concluded that 255 g ha-1 of Mo applied at R7 and, especially, doses of 200 g ha-1 of Mo or higher applied at R8 can reduce common bean seed quality.

https://doi.org/10.1590/0034-737X201562040012 1134 descargas

Detecção do mofo-branco no feijoeiro, utilizando características espectrais
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Boechat, Lorena Temponi

; Pinto, Francisco de Assis de Carvalho

; Paula Júnior, Trazilbo José de

; Queiroz, Daniel Marçal

; Teixeira, Hudson

Revista Ceres

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Dic 2014, Volumen 61 Nº 6 Paginas 907 - 915

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Neste trabalho, objetivou-se estudar a resposta espectral de plantas de feijoeiro à infecção por Sclerotinia sclerotiorum, fungo causador do mofo-branco. Foram conduzidos dois ensaios, no delineamento em blocos ao acaso, com cinco tratamentos e quatro repetições, no primeiro ensaio, e seis tratamentos e quatro repetições, no segundo. Medidas de reflectância espectral do dossel do feijoeiro, entre os comprimentos de ondas de 400 a 850 nm, foram tomadas aos 60, 71, 91 e 102 dias após a emergência (DAE), no primeiro ensaio, e aos 13, 27, 34, 56, 71 e 91 DAE, no segundo. Os dados espectrais foram transformados em índices de vegetação: da diferença normalizada (NDVI), da diferença de verde normalizado (GNDVI) e ajustado para o solo (SAVI). A severidade do mofo-branco foi avaliada, visualmente, aos 102 DAE, no primeiro ensaio, e aos 92 DAE, no segundo. Houve correlação significativa apenas no segundo ensaio, entre a severidade da doença e o NDVI, aos 71 DAE. A resposta espectral do feijoeiro pode ser utilizada para a detecção da ocorrência do mofo-branco e, consequentemente, como ferramenta no manejo integrado.

The objective of this work was to study the spectral response of bean plants infected by Sclerotinia sclerotiorum, the causal agent of white mold. Two experiments were conducted using a randomized block design with five treatments and four replications in the first trial and six treatments and four replications in the second. Measurements of canopy spectral reflectance of wavelengths between 400 and 850 nm were taken at 60, 71, 91 and 102 days after emergence (DAE) in the first trial and at 13, 27, 34, 56, 71 and 91 DAE in the second. Spectral data were transformed into vegetation indices: the normalized difference (NDVI), the green normalized difference (GNDVI) and the soil adjusted (SAVI). The white mold severity was visually assessed at 102 DAE in the first trial and at 92 DAE in the second. A significant correlation between disease severity and NDVI was found only at 71 DAE in the second trial. The bean crop spectral response can be used to detect white mold occurrence and, consequently, as an integrated management tool.

https://doi.org/10.1590/0034-737X201461060004 3248 descargas

Sclerotia morphology traits and mycelial growth rate are not informative variables for population studies of Sclerotinia sclerotiorum
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Lehner, Miller S.

; Paula Júnior, Trazilbo J.

; Silva, Rhaphael A.

; Vieira, Rogério F.

; Carneiro, José Eustáquio S.

; Mizubuti, Eduardo S. G.

Tropical Plant Pathology

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Dic 2014, Volumen 39 Nº 6 Paginas 471 - 477

Resumen: En | Texto: En | PDF: En

The usefulness of sclerotia morphology traits and mycelial growth rate to infer phenotypic variability in populations of Sclerotinia sclerotiorum associated with common beans in Minas Gerais State (MG) was assessed in two experiments. Isolates (131) were collected in the Northwestern, Alto Paranaíba, Zona da Mata and Southern regions of MG and the mycelial growth rate, the number, weight and dimensions (length, width and thickness) of sclerotia and mycelial pigmentation were assessed. There was a high variability among isolates, even among colonies of the same isolate. The variance of the first experiment for the mycelial growth rate, number, weight, length, width and thickness of sclerotia, were 0.01, 190.15, 0.01, 0.62, 0.12 and 0.05, whereas in the second, the variances were 0.01, 28.48, 0.002, 0.18, 0.06 and 0.03, respectively. Most correlations between traits were of low magnitude except that between length and width (r = 0.84, 'P < 0.001). Regarding colony pigmentation, non-pigmented, pigmented and highly pigmented isolates were identified, but for most isolates this characteristic varied between experiments. No groups based on phenotypic traits were detected. The morphological traits evaluated in the present study are not suitable for characterization of populations of S. sclerotiorum.

2474 descargas

Selection of anthracnose resistant common beans using detached leaves in partially controlled environment
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Pereira, Alisson Campos

; Paula, Ramon Gonçalves de

; Paula Júnior, Trazilbo José de

; Silva, Leonardo Corrêa da

; Carneiro, José Eustáquio de Souza

; Carneiro, Pedro Crescêncio Souza

Revista Ceres

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Ago 2014, Volumen 61 Nº 4 Paginas 518 - 522

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

O objetivo deste trabalho foi verificar a possibilidade de se efetuar seleção de plantas de feijoeiro resistentes à antracnose, utilizando-se folhas primárias destacadas em ambiente parcialmente controlado, em casa de vegetação, e detectar possíveis diferenças na reação de genótipos de feijoeiro à antracnose. Para isso, as linhagens de feijoeiro Ouro Negro, Ouro Vermelho, Manteigão Fosco 11, Rudá, Rudá-R, VP8, BRSMG Madrepérola, Pérola, Meia Noite e BRSMG Talismã foram caracterizadas quanto à reação às raças 65, 81 e 453 de Colletotrichum lindemuthianum, comparando-se essa metodologia com a tradicionalmente utilizada, com inoculação de plantas no estádio fenológico V2. Posteriormente, as linhagens Rudá-R, Rudá e Pérola foram inoculadas com as raças 65 e 453 de C. lindemuthianum, com o objetivo de avaliar o índice de coincidência da severidade da antracnose pelas duas metodologias de inoculação. Em geral, as duas metodologias proporcionaram resultados semelhantes quanto à reação apresentada pelos cultivares. A utilização de folhas primárias destacadas de feijoeiro em ambiente parcialmente controlado mostrou-se viável para a seleção, quanto à resistência à antracnose, com as vantagens da menor infraestrutura necessária e da redução de recursos, espaço e tempo.

The objectives of this study were to evaluate the possibility of selecting anthracnose resistant common bean plants using detached primary leaves in partially controlled environment of a greenhouse and identify differences in the reaction of genotypes to anthracnose. The common bean cultivars Ouro Negro, OuroVermelho, ManteigãoFosco 11, Rudá, Rudá-R, VP8, BRSMG Madrepérola, Pérola, MeiaNoite and BRSMG Talismãwere characterizedfor resistance to the races 65, 81 and 453 of Colletotrichum lindemuthianum and the method of detached primary leaves was compared to the method with the traditional inoculation of plants at the phenological stage V2. The lines Rudá, Rudá-R and Pérola were inoculated with the races 65 and 453 of C. lindemuthianum, aiming to assess the rate of coincidence of anthracnose severity by both inoculation methods. In general, the two methods presented similar results for the reaction of the cultivars. The use of detached primary leaves of common bean plants in the partially controlled environment was feasible for selection of plants resistant to anthracnose and has the advantages of low-needed infrastructure and reduction of resources, space and time.

https://doi.org/10.1590/0034-737X201461040010 1417 descargas

10.

BRSMG Realce: Common bean cultivar with striped grains for the state of Minas Gerais
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Melo, Leonardo Cunha

; Abreu, Ângela de Fátima Barbosa

; Ramalho, Magno Antonio Patto

; Carneiro, José Eustáquio de Souza

; Paula Júnior, Trazilbo José de

; Del Peloso, Maria José

; Pereira, Helton Santos

; Faria, Luís Cláudio de

; Pereira Filho, Israel Alexandre

; Moreira, José Aloísio Alves

; Martins, Maurício

; Vieira, Rogério Faria

; Martins, Fábio Aurélio Dias

; Coelho, Maurício Antônio de Oliveira

; Costa, Joaquim Geraldo Cáprio da

; Wendland, Adriane

; Santos, João Bosco dos

; Diaz, José Luiz Cabrera

; Carneiro, Pedro Crescêncio de Souza

; Del Giúdice, Marcos Paiva

; Faria, Josias Correia de

Crop Breeding and Applied Biotechnology

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Mar 2014, Volumen 14 Nº 1 Paginas 61 - 64

Resumen: En | Texto: En | PDF: En

The common bean cultivar "BRSMG Realce", recommended for the state of Minas Gerais, has high yield potential and resistance to powdery mildew, bacterial wilt and to anthracnose pathotypes 65, 73, 77, 81, 91, 475 and 479. The plants and pods are high, resulting in lower loss during mechanical harvest.

2002 descargas Citado 2 veces en SciELO

11.

Genotypic variability in seed accumulation of foliar-applied molybdenum to common bean
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Vieira, Rogério Faria

; Paula Júnior, Trazilbo José de

; Carneiro, José Eustáquio de Souza

; Queiroz, Marina Viana

Revista Brasileira de Ciência do Solo

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Feb 2014, Volumen 38 Nº 1 Paginas 205 - 213

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

A variabilidade genotípica em feijão-comum em acumular molibdênio (Mo) nas sementes foi demonstrada quando o solo é a principal fonte de Mo; entretanto, essa variabilidade ainda é desconhecida quando o Mo é aplicado na folhagem. Portanto, determinaram-se teores de Mo da semente (TMoS) e conteúdos de Mo da semente (CMoS) de 12 genótipos em quatro experimentos conduzidos na Zona da Mata, Minas Gerais, Brasil, nos quais pulverizaram-se as plantas com 600 g ha-1 de Mo. Para comparação, conduziram-se mais dois experimentos sem aplicação de Mo. Nesse caso, não foi detectado Mo na semente ou o TMoS médio foi 2,83 µg g-1, sem diferença significativa entre genótipos. Em média, com aplicação de Mo, os TMoS variaram de 14,7 a 25,0 µg g-1 e os CMoS, de 3,94 a 6,84 µg. 'Majestoso' ficou entre os genótipos com os mais altos TMoS nos quatro experimentos. No entanto, as sementes grandes de 'Jalo MG-65' e 'Carnaval' geralmente apresentaram mais altos CMoS que as sementes pequenas da 'Majestoso'. 'Ouro Negro' e, sobretudo, 'Valente' ficaram entre os genótipos com os mais baixos TMoS e CMoS. Os valores dessas variáveis foram 61 e 90 %, respectivamente, mais altos na 'Majestoso' que na 'Valente'. Os resultados sugerem que genótipos de feijão-comum diferem na capacidade de acumular nas sementes o Mo aplicado na folhagem. Sementes enriquecidas com Mo de genótipos de sementes grandes ou de genótipos de sementes pequenas bons acumuladores de Mo na semente podem ser produzidas com dose relativamente menor de fertilizante molíbdico.

The genotypic variability in molybdenum (Mo) accumulation in common bean seeds has been demonstrated in cases in which soil is the main Mo source, but this variability is yet unknown when Mo is foliar-applied. Therefore, seed Mo concentrations (SMoCc) and seed Mo contents (SMoCt) of 12 genotypes were determined in four experiments in the Zona da Mata, Minas Gerais, Brazil, in which plants were sprayed with 600 g ha-1 Mo. For comparison, two additional experiments without external Mo were conducted. Without Mo application, the average SMoCc was undetectable or 2.83 µg g-1, without significant differences among genotypes. On average, with Mo applications, SMoCc ranged from 14.7 to 25.0 µg g-1 and SMoCt, from 3.94 to 6.84 µg. 'Majestoso' was among the genotypes with the highest SMoCc in the four experiments. However, the large-seeded 'Jalo MG-65' and 'Carnaval' generally had higher SMoCt than the small-seeded 'Majestoso'. 'Ouro Negro' and especially 'Valente' were among the genotypes with the lowest SMoCc and SMoCt. The values of these variables were 61 and 90 %, respectively, higher for 'Majestoso' than those for 'Valente'. Our results suggest that common bean genotypes differ in their capacity to accumulate foliar-applied Mo in the seeds. Mo-rich seeds of large-seeded genotypes or of small-seeded of small-seeded genotypes with good capacity to accumulate Mo in seeds can be produced with relatively less Mo fertilizer.

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12.

Infection process of Fusarium oxysporum f. sp. phaseoli on resistant, intermediate and susceptible bean cultivars
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Pereira, Alisson C.

; Cruz, Maria Fernanda A.

; Paula Júnior, Trazilbo J.

; Rodrigues, Fabrício A.

; Carneiro, José Eustáquio S.

; Vieira, Rogério F.

; Carneiro, Pedro Crescêncio S.

Tropical Plant Pathology

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Ago 2013, Volumen 38 Nº 4 Paginas 323 - 328

Resumen: En | Texto: En | PDF: En

The objective of this study was to understand the infection process of Fusarium oxysporum f. sp. phaseoli (Fop) in bean cultivars classified as resistant (Manteigão Fosco 11), intermediate (VP8) and susceptible (Meia Noite). Plants of the three cultivars were inoculated at 10 days after emergence with a suspension of 1×10(6) conidia of Fop per mL. At 43 days after the inoculation, stem segments were observed with a scanner electronic microscope. The cultivars Manteigão Fosco 11 and VP8 presented an occluding material in the xylem vessels, which may have restricted tissue colonization by Fop. The resistance of bean cultivars to Fop seemed also to be explained by structural differences in the xylem tissue.

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13.

Introgression of resistance to pathogens in common bean lines with the aid of molecular markers
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Pereira, Alisson Campos

; Poersch, Nerison Luis

; Carneiro, Pedro Crescêncio Souza

; Paula Júnior, Trazilbo José

; Barros, Everaldo Gonçalves

; Carneiro, José Eustáquio Souza

Crop Breeding and Applied Biotechnology

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Jul 2013, Volumen 13 Nº 2 Paginas 120 - 126

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Visando incorporar resistência aos patógenos da antracnose e da mancha-angular nas linhagens VC8 e VC9 e na cultivar BRSMG Talismã, foram realizados cruzamentos destas com a linhagem Rudá-R, doadora dos alelos Phg1, Co-4, Co-10, que conferem resistência à Pseudocercospora griseola e Colletotrichum lindemuthianum. Após a realização dos cruzamentos e obtenção das populações de retrocruzamentos, as plantas RC1F1 foram inoculadas com a raça 65 de C. lindemuthianum. As resistentes foram genotipadas com os marcadores SCARH13, SCARY20 e SCARF10, ligados aos alelos Phg1, Co-4 e Co-10, respectivamente. Com base nos dados moleculares foram selecionadas 44 plantas. As progênies provenientes da multiplicação destas plantas foram avaliadas em três safras quanto à produtividade de grãos, arquitetura de planta e aspecto dos grãos. Levando-se em conta estas avaliações e os dados moleculares, foram selecionadas 13 progênies promissoras para a extração de linhagens.

Aiming to incorporate resistance to the anthracnose and angular leaf spot pathogens in the common bean lines BRSMG Talismã, VC8 and VC9, crosses were made between these lines and the line Rudá-R, donor of the alleles Phg1, Co-4, Co-10, which confer resistance to Pseudocercospora griseola and Colletotrichum lindemuthianum. After the crosses, the backcross populations were obtained, and the RC1F1 plants were inoculated with race 65 of C. lindemuthianum. The resistant plants were genotyped with the markers SCARH13, SCARY20 and SCARF10, linked to the alleles Phg1, Co-4 and Co-10, respectively. Based on the molecular data, 44 plants were selected. The progenies originating from multiplication of these plants were evaluated over three seasons for grain yield, plant architecture and grain aspects. Based on these considerations and molecular data, 13 promising progenies were selected for developing inbreds.

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14.

Chlamydospore concentration for assessment of Fusarium root rot on common bean
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Nicoli, Alessandro

; Zambolim, Laércio

; Paula Júnior, Trazilbo J.

; Vieira, Rogério F.

; Teixeira, Hudson

; Carneiro, José Eustáquio S.

Tropical Plant Pathology

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Abr 2013, Volumen 38 Nº 2 Paginas 149 - 151

Resumen: En | Texto: En | PDF: En

Fusarium root rot caused by Fusarium solani f. sp. phaseoli (Fsp) is widely distributed in Latin America. Experiments involving artificial inoculations could be better compared whether the number of Fsp infective propagules is well quantified by using chlamydospores. This study aimed to define the adequate concentration of chlamydospores of Fsp for assessment of the disease severity under controlled conditions. In greenhouse, two experiments were performed, where common bean susceptible genotypes were sown in a substrate infested with 0, 1000, 2000, 3000, 4000, 5000 or 6000 chlamydospores g-1 of substrate. Plants were rated for disease severity at 30 d after emergence. Linear response plateau was used to represent the relationship between disease severity and concentration of chlamydospores in the substrate. According to our results, concentrations between 4500 and 5000 chlamydospores g-1 of substrate maximizes the disease severity and can be recommended to evaluate large-scale screenings of bean germplasm.

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15.

Resistance of advanced common bean lines to Fusarium root rot
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Nicoli, Alessandro

; Zambolim, Laércio

; Paula Júnior, Trazilbo J.

; Vieira, Rogério F.

; Teixeira, Hudson

; Carneiro, José Eustáquio S.

Tropical Plant Pathology

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Dic 2012, Volumen 37 Nº 6 Paginas 393 - 398

Resumen: En | Texto: En | PDF: En

Fusarium root rot (FRR) is a distributed disease of common beans in Brazil. Our main aim was to verify if there are genotypes, mainly advanced lines from the common bean breeding program with levels of resistance to FRR similar to those of the line A-300. We also compared three developmental stages for FRR assessment. Genotypes of six classes were evaluated in greenhouse and field experiments. In greenhouse, substrate was infested with chlamydospores. In field, genotypes were screened in area infested with Fusarium solani f. sp. phaseoli. Plants were rated for disease at V3, R5 and R7 stages. Correlation among area under the disease progress curve (AUDPC) in greenhouse and in the field experiments was significant. Genotypes were ranked into four groups based on AUDPC. Sixteen advanced lines were as resistant to FRR as A-300. Correlation between the disease rating at R5 stages and AUDPC was higher than those among AUDPC and either disease rating at V3 or R7 in all experiments. Our results indicate that there are advanced lines with levels of FRR resistance similar to those of A-300 and that the FRR assessment at the R5 stage is more appropriated than at either V3 or R7.

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