Abstract
Halo-blight is an important worldwide bacterial disease of common bean (Phaseolus vulgaris L.) caused by Pseudomonas syringae pv. phaseolicola. Nine races of the pathogen and five race-specific resistance genes have been previously described. However, a quantitative response to this pathogen has also been described. The objective of this study was to identify halo-blight resistance loci linked to molecular markers that could be used in resistance breeding. Chromosomal regions related to race 5 halo-blight resistance were localized on a genetic map of RAPD and AFLP molecular markers and constructed by the analysis of a "Jules" × "Canela" F2 progeny. "Jules" shows quantitative resistance to halo-blight and "Canela" is a very appreciated but susceptible Spanish bean landrace. Two QTL for resistance to halo-blight were mapped in two linkage groups. There were four large groups, with 14-22 molecular markers each, five with 4-8 markers each, and three with 2 or 3 markers each.
Original language | English |
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Pages (from-to) | 397-404 |
Number of pages | 8 |
Journal | Euphytica |
Volume | 152 |
Issue number | 3 |
DOIs | |
Publication status | Published - Nov 2006 |
Externally published | Yes |
Keywords
- Common bean
- Disease resistance
- Genetic mapping
- Halo-blight
- Phaseolus vulgaris
- Pseudomonas syringae pv. phaseolicola
ASJC Scopus subject areas
- Agronomy and Crop Science
- Genetics
- Plant Science
- Horticulture