Fecha/hora: 01/06/2024 02:06:59

Biblioteca(s): | INIA La Estanzuela.
Fecha corriente: | 21/02/2014
Fecha de la última actualización: | 29/01/2020
Autoria: | DIAZ-LAGO, J.E.; STUTHMAN, D.D.; LEONARD, K.J.
Afiliación: | JUAN ENRIQUE DIAZ LAGO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Department of Agronomy and Plant Genetics.; Department of Plant Pathology, University of Minnesota, St.
Título: | Evaluation of components of partial resistance to oat crown rust using digital image analysis.
Año de publicación: | 2003
Fuente/Imprenta: | Plant Disease, 1 June 2003,  Volume 87, Issue 6, Pages 667-674. OPEN ACCESS
DOI: | 10.1094/PDIS.2003.87.6.667
Idioma: | Inglés
Notas: | Article history:Accepted for publication 9 January 2003/Published Online:23 Feb 2007.

Contenido:

Digital image analysis is an objective and nondestructive method potentially capable of providing accurate and precise estimates of disease resistance components. This study was conducted to quantify components of partial resistance to crown rust through the analysis of sequential digital images of inoculated leaves of adult oat plants, and to compare components found in two sources of resistance unrelated genetically. Uredinium density, relative infection frequency,
latent period, days to first pustule appearance, uredinium size, and disease progress rates were assessed on three oat lines (RS-line 3W-C2R-9-3b, MN-841801, Starter) in two greenhouse experiments. Resistant lines had fewer and smaller uredinia, and these appeared later than in the
susceptible check. Relative infection frequency, latent period, and uredinium size were equally important components in the expression of the partial resistance to crown rust, and the two sources of resistance could not be differentiated by any of the variables studied. The analysis of
sequential digital images of diseased leaves produced precise estimates of partial resistance
components and disease progress rates.

Palabras-Clave: | AVENA SATIVA; HOST RESISTANCE; PUCCINIA CORONATA.
Thesagro: | AVENA.
Categoría del tema: | F01 Cultivo
URL: | http://www.ainfo.inia.uy/digital/bitstream/item/13451/1/pdis.2003.87.6.667.pdf
Registro original: | INIA La Estanzuela (LE)
Ejemplares: | LE - (42264-1) - PXI - AP - DD - PP/PLANT DISEASE/2003 -  -  - DIS