Runner Bean (Phaseolus coccineusL.)

Le résumé fourni par la source

Runner bean, a legume species originating from Mesoamerica, has a close genetic relationship with the common bean. Although classified as perennial, it is typically cultivated as an annual crop for its edible immature pods and dry seeds. Domestication of Phaseolus and its related species has been observed several times, indicating their usefulness and suitability for domestication. The genus Phaseolus contains various groups or natural gene pools. While genetic research on the common bean is extensive, runner bean has received comparatively less attention. Approximately 4685 runner bean accessions have been reported worldwide, encompassing a wide range of phenotypic variation and distinct genetic traits. This extensive genetic diversity is critical for crop improvement, providing a reservoir of disease resistance and cold-tolerance features. Nevertheless, the limited characterization of the germplasm hinders its potential as a donor species for inter-specific hybridization, thereby restricting its application in Phaseolus breeding efforts, such as for the improvement of common bean. Achieving the development of cultivars that are adaptable to a wide range of conditions and have a fixed growth pattern, which would make mechanical harvesting easier, is a significant challenge and opportunity for the future. The diversity and population differentiation levels of runner bean suggest that it has the potential to serve as an excellent source of variability for breeding several plant traits.

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