Data/hora: 16/06/2024 05:58:18

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 22/04/2020
Data da última atualização: | 22/04/2020
Autoria: | PEREIRA, R.; ABREU, A. de F. B.; NALIN, R. S.; SOUZA, E. A. de.
Afiliação: | RAFAEL PEREIRA, UFLA; ANGELA DE FATIMA BARBOSA ABREU, CNPAF; RAFAEL STORTO NALIN, ESALQ; ELAINE APARECIDA DE SOUZA, UFLA.
Título: | Phenotyping for angular leaf spot severity and its implication in breeding common bean for resistance.
Ano de publicação: | 2019
Fonte/Imprenta: | Scientia Agricola, v. 76, n. 5, p. 415-423, Sept./Oct. 2019.
ISSN: | 1678-992X
DOI: | 10.1590/1678-992X-2017-0394
Idioma: | Inglês
Conteúdo: | 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, V2-field and V3-field were 68 %, 69 % and 88 %, respectively. Evaluations in V3 stage and in the field were the phenotyping methods more efficient for ALS severity. However, evaluation in V3 stage is impracticable to assess routinely many genotypes in breeding programs. Evaluation in V2 stage may be used to carry out a first screening, especially in the early stages of breeding programs. Moreover, this methodology may be used in association with evaluation of plants in the field to increase genetic gain.
Palavras-Chave: | Pseudocercospora griseola.
Thesagro: | Feijão; Inoculação Artificial; Melhoramento Genético Vegetal; Phaseolus Vulgaris; Resistência Genética.
Thesaurus Nal: | Beans; Genetic resistance; Inoculation methods; Plant breeding; Pseudocercospora.
Categoria do assunto: | G Melhoramento Genético
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/212432/1/CNPAF-2019-sa-rp.pdf
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (35767-1) - UPC - AP - DD - 2019 -  - 2019 - DIS