Data/hora: 03/06/2024 16:30:41

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 17/02/2016
Data da última atualização: | 17/02/2016
Autoria: | PEREIRA, R.; SOUZA, E. A.; BARCELOS, Q. L.; ABREU, A. F. B.; LIBRELON, S. S.
Afiliação: | R. PEREIRA, UFLA; E. A. SOUZA, UFLA; Q. L. BARCELOS, UFMT, Sinop-MT; ANGELA DE FATIMA BARBOSA ABREU, CNPAF; S. S. LIBRELON, UFLA.
Título: | Aggressiveness of Pseudocercospora griseola strains in common bean genotypes and implications for genetic improvement.
Ano de publicação: | 2015
Fonte/Imprenta: | Genetics and Molecular Research, Ribeirão Preto, v. 14, n. 2, p. 5044-5053, 2015.
ISSN: | 1676-5680
DOI: | 10.4238/2015.May.12.7
Idioma: | Inglês
Conteúdo: | The fungus Pseudocercospora griseola, the causal agent of angular leaf spot in the common bean (Phaseolus vulgaris L.), exhibits a broad pathogenic variability that complicates the development of resistant cultivars. For breeding programs to successfully obtain common bean cultivars with durable resistance, knowing the aggressiveness of different strains, as well as the mechanisms of genetic resistance, is important. The aims of this study were to study the variation within race 63.63 by evaluating the aggressiveness of different strains, to analyze the genetic resistance of common bean lines to P. griseola , and to ascertain the implications for genetic improvement in obtaining resistance in this pathosystem. Four strains, collected from different locations, were inoculated in three groups of common bean lines in a greenhouse, and the severity of the disease was subsequently evaluated. Statistical analyses were carried out using the diallel method, which provided information on the vertical and horizontal resistance of host plants, in addition to information regarding the aggressiveness of the strains. The aggressiveness of P. griseola differed between the strains of race 63.63. The diallel method proved to be promising for the identification of horizontal and vertical resistance in the common bean-P. griseola pathosystem, with a predominance of horizontal resistance. Gene pyramiding, using marker-assisted selection, may not be the most effective strategy for obtaining durable resistance.
Palavras-Chave: | Melhoramento genético; Pseudocercospora griseola.
Thesagro: | Feijão; Fungo; Phaseolus vulgaris.
Thesaurus Nal: | Genetic improvement.
Categoria do assunto: | G Melhoramento Genético
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/139215/1/CNPAF-2015-gmrafba.pdf
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (33920-1) - UPC - AP - DD - 2015 -  - 2015 - DIS