Strategies for selecting common bean with a higher resistance to web-blight.
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| Autores: | , , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2006 |
| Descripción: | Higher levels of web blightresistance is needed to increase common bean yield and seedquality in the hot and humid regions of Central America andthe Caribbean. Only moderate levels of resistance have beenidentified in common bean. Moreover, virulence patterns ofthe web- blight pathogen, Thanatephorus cucumeris (Frank)Donk, vary among geographic locations. Fields screening forweb-blight resistance is limited to seasons that favor thedevelopment of the disease. In the field, it is also difficult toseparate disease avoidance due to plant architecture andphysiological resistance. Greenhouse and laboratorytechniques have been developed that facilitate the screeningof bean lines for physiological resistance. A recurrentselection scheme is proposed to select beans with higherlevels of web-blight resistance. Inter-specific crosses may beused to broaden the genetic base of resistance to web-blight.P. coccineus lines with useful levels of resistance have beenidentified. Transgenic bean plants with herbicide resistancewould be useful for minimum tillage. A cover of deadvegetation on the soil surface could help to reduce the spreadof web-blight. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/13563 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/agromeso/article/view/13563 |