Consulta: creatorFacets:"Dubcovsky,Jorge"
Registros recuperados: 3
Data/hora: 11/06/2024 00:57:05

Identification of microsatellites linked to Lr47
Provedor de dados: 69
Autores: Vanzetti,Leonardo Sebastián; Brevis,Juan Carlos; Dubcovsky,Jorge; Helguera,Marcelo.
Leaf rust resistance gene Lr47 is located within a interstitial segment of Triticum speltoides Taush. 7S chromosome translocated to the short arm of chromosome 7A of bread wheat. This gene is resistant against currently predominant races of leaf rust from Argentina. The objectives of this study were to identify microsatellites linked to this source of resistance as a potential tool to introgress this source of resistance. Isogenic lines with and without Lr47 developed from 10 cultivars/breeding lines as well as 10 microsatellites previously mapped in 7AS chromosome were used in this study. Microsatellite gwm 60 was the only marker that co-segregated completely linked to Lr47. These data indicate that gwm 60 could be a valuable marker to introgress Lr47 in...
Tipo: Journal article
Palavras-chave: Gwm 60; Leaf rust; Marker assisted selection; Puccinia triticina Ericks.; Triticum aestivum.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300018

Aggressiveness and physiological specialization of Septoria tritici Rob. isolates
Provedor de dados: 63
Autores: Gieco,Jorge Omar; Dubcovsky,Jorge; Camargo,Luis Eduardo Aranha.
Pathogenicity tests verifying the behavior of Septoria tritici isolates should be considered as a priority in the selection of resistant wheat materials to this pathogen, since the aggressiveness of each isolate can vary significantly, causing problems in the evaluation and selection of resistant genotypes. The objective of this work was to determine whether physiologic specialization exists among Argentinean and American Septoria tritici isolates, through the analysis of their pathogenicity on cultivars and lines of bread wheat (Triticum aestivum L.). The experiments were carried out in Castelar-Argentina and in Davis-USA. In Castelar, a split plot design (n = 4) was used. The cultivars or lines were randomized in the plots and the isolates in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycosphaerella graminicola; Triticum aestivum; Leaf blotch; Vertical resistance; Horizontal resistance.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000400010

Interaction between resistance to Septoria tritici and phenological stages in wheat
Provedor de dados: 63
Autores: Gieco,Jorge Omar; Dubcovsky,Jorge; Camargo,Luis Eduardo Aranha.
Studies dedicated to understanding the behavior of pathogens in relation to their hosts are the starting point for any breeding program aimed to develop resistant cultivars. The objective of this study was to analyze the resistance to Septoria tritici Rob in 77 F11 progenies of wheat derived from the three-way cross Tadinia &lt;FONT FACE=Symbol&gt;´&lt;/FONT&gt; (Yecora rojo &lt;FONT FACE=Symbol&gt;´&lt;/FONT&gt; UC554) in the phenological stages of seedling, tillering, and flag leaf/flowering. Three field experiments were conducted where plants were artificially inoculated at one of the above mentioned phenological stages by spraying with a suspension of conidia. A randomized block design with four replications was used in each experiment. Disease...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycosphaerella graminicola; Triticum aestivum; Leaf blotch; Disease resistance.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000400011