Consulta: subjectFacets:"Leaf blotch"
Registros recuperados: 3
Data/hora: 10/06/2024 10:27:42

Efecto de la resistencia y altura de planta del trigo en la incidencia de  Septoria tritici y su expresión en el rendimiento
Provedor de dados: 32
Autores: Rodríguez Contreras, María Elsa.
Se evaluaron variedades con diferente nivel de resistencia a Septoria tritici en  parcelas con control y sin control de la enfermedad en las localidades de  Juchitepec, Edo. de México y Nanacamilpa, Tlaxcala. Se observó que los daños  en el rendimiento de trigo que causa el tizón foliar pueden llegar a ser hasta del  50% en variedades susceptibles. Se determinaron tres grupos de variedades  con base a su susceptibilidad: resistentes (Rebeca F2000) moderadamente  resistentes (Triunfo F2004) y susceptibles (Gálvez M87, Salamanca S75 y  Verano S91). De seis líneas altas y seis bajas evaluadas en parcelas con y sin  competencia (separación entre hileras de plantas), el tizón foliar afectó más a las  líneas bajas que a las altas. Parcelas con competencia...
Tipo: Tesis
Palavras-chave: Tizón foliar; Pérdidas; Rendimiento; Variedades susceptibles; Líneas altas; Líneas bajas; Rebeca F2000; Doctorado; Leaf blotch; Yield; Losses; Susceptible varieties; Tall lines; Short lines.
Ano: 2008
URL: http://hdl.handle.net/10521/1358

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