Breeding for common bean (Phaseolus vulgaris L.) rust resistance in Brazil

Abstract

Common bean is an economically, nutritionally, and socially important crop. It is grown in distinct regions and different seasons around the world by subsistence level farmers with low-technology input as well as by farmers that use high input technologies. One important factor that can limit the bean growing and drastically affect grain yields is the high number of destructive pathogens that attack and cause serious damage to the crop. Among them is bean rust, incited by the fungus Uromyces appendiculatus. This disease is distributed throughout the world, but it effectively causes major production problems in humid tropical and subtropical regions. In Brazil, rust causes major losses in south, southeast, and central regions of the country. Bean rust control by resistant cultivars is an easy and economical strategy to be used in association to other rust management practices. Pyramiding of different race-specific resistance genes in association with other genes conferring adult plant resistance, slow rusting, and reduced pustule size can prolong the lifespan of a common bean cultivar by creating a more durable resistance complex against the rust pathogen. This review manuscript presents an overview on bean rust and reports some breeding efforts aiming to develop rust resistant cultivars in Brazil.

Efficacy of Some Biotic and Abiotic Factors in Controlling Common Bean Rust Disease Caused by Uromyces appendiculatus

“…The use of plant resistance not only is harmless to the environment but also an economically sound strategy compared to chemical control. However, the wide variability of U. appendiculatus represents an obstacle to breeders aiming at the development of common bean cultivars with durable resistance to rust (Souza et al, 2013). At the same time, the cost involved in chemical pesticides is a major concern for farmers in developing countries.…”

Genome-wide analysis of the transcriptional response to drought stress in root and leaf of common bean

“…Among the stress-inducible genes, those involved in direct protection from stress, including the synthesis of regulatory proteins such as TFs, PKs, and phosphatase, were activated early in the DT genotype. In the DS plants (commercial cultivar Pérola), several genes related to the response to biotic stimulus in roots were identified, which was expected because disease resistance is one of the main pillars of genomic breeding of common bean lines (Souza et al, 2013).…”

Native Endophytic Pseudomonas putida as a Biocontrol Agent against Common Bean Rust Caused by Uromyces appendiculatus

“…Actually, the use of plant resistance is not only harmless to the environment but also an economically sound strategy, compared to chemical control. However, the wide variability of U. appendiculatus represents an obstacle to breeders aiming at the development of common bean cultivars with durable resistance to rust [ 8 ].…”