Resistance gene analogs in common bean

BALATTI P. & STENGLEIN S.

Genetic Resources and Biotechnology: characterization and utilization of genetic resources using molecular approaches

REGENCY PUBLICATIONS

Año: 2005; p. 121 - 133

Common bean (Phaseolus vulgaris L.) is one of the most ancient crops of the New World. It is widely grown in areas between 52º N and 32º S latitude, which are distributed among the five continents. In the past five-ten years the advent of molecular biology has enabled researches to identify many R-genes from model and crop species. Although a wide array of pathogen taxa suggest the existence of a high number of effector molecules, R-genes encode five classes of proteins. The largest class includes R-genes, which encodes a nucleotide binding site (NBS) plus leucinerich repeat (LRR) protein, presumably cytoplasmic and membrane associated. In summary, the understanding of the molecular basis of plant disease resistance has increased significantly and continues to do so. The combination of novel approaches including molecular techniques and genetics will provide insights into pathogen-defense mechanism and subsequent disease resistance in common bean in years to come.Phaseolus vulgaris L.) is one of the most ancient crops of the New World. It is widely grown in areas between 52º N and 32º S latitude, which are distributed among the five continents. In the past five-ten years the advent of molecular biology has enabled researches to identify many R-genes from model and crop species. Although a wide array of pathogen taxa suggest the existence of a high number of effector molecules, R-genes encode five classes of proteins. The largest class includes R-genes, which encodes a nucleotide binding site (NBS) plus leucinerich repeat (LRR) protein, presumably cytoplasmic and membrane associated. In summary, the understanding of the molecular basis of plant disease resistance has increased significantly and continues to do so. The combination of novel approaches including molecular techniques and genetics will provide insights into pathogen-defense mechanism and subsequent disease resistance in common bean in years to come.