Data/hora: 03/06/2024 12:40:55

Biblioteca(s): | Epagri-Sede.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | Nacional - B
Data corrente: | 08/09/2016
Data da última atualização: | 08/09/2016
Autoria: | ROCHA, G. A. F.; ALVES, D. P.; OLIVEIRA, J. C.; BROMMONSCHENKEL, S. H.
Título: | Identification and mapping of resistance genes to Phakopsora pachyrhizi in soybean (Glycine max L.) accession PI 594767-A.
Ano de publicação: | 2016
Fonte/Imprenta: | Genetics and Molecular Research , Ribeirão Preto, SP, v. 15, n. 3, p. 1-15, 2016.
Idioma: | Inglês
Conteúdo: | he goal of this study was to study resistance inheritance in the soybean (Glycine max L.) accession PI 594767-A to the Phakopsora pachyrhizi isolate PPUFV02, and map the resistance gene(s) identified using microsatellite markers. Crosses between PI 594767-A and the susceptible cultivar ?Conquista? gave rise to the segregating subpopulations 26C-2 and 26C-5, which in the F2 generation were evaluated for their reactions to PPUFV02. In addition, analyses with microsatellite markers linked to the Rpp1-Rpp5 loci were also performed. The segregation pattern obtained in 26C-2 revealed that resistance was governed by a recessive gene; a 1:2:1 segregation pattern was observed in 26C-5, indicating control by a gene with partial dominance. This variability may have been caused because environmental conditions, particularly temperature, when 26C-5 was assessed were unfavorable for pathogen development, allowing the phenotypic expression of heterozygous alleles in PI 594767-A. A resistance gene was located in the soybean linkage group G, in the genomic region between Sct_187r2 and Sat_064 that contains the Rpp1 locus. Resistance in PI 594767-A is probably conferred by a new Rpp1 gene allele, because this accession has a haplotype for Sct_187r2 and Sat_064, which differs from haplotypes of accessions that also contain resistance alleles that map the Rpp1 locus. The use of Sct_187r2 and Sat_064 will facilitate the introgression of the resistance allele from PI 594767-A and its pyramiding with other resistance genes into genotypes with superior agronomic characteristics, in order to obtain cultivars with broad-spectrum resistance to P. pachyrhizi.
Palavras-Chave: | Asian rust; Disease resistance; Genetic analysis; Genetic inheritance; Resistance genetic mapping.
Categoria do assunto: | G Melhoramento Genético
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_38227.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (100442-1) - UPC - AP - DD -  -  -  - DIS