INCREASE – Intelligent Collections of Food Legumes Genetic Resources for European Agrofood Systems

Bean of the Month

Our series 'Bean of the Month' highlights a different bean variety from the INCREASE Citizen Science Experiment collection each week, exploring its unique characteristics and origin. Drawing on data collected by citizen scientists, each bean profile provides insights into its main traits based on citizen evaluations. It is a fun and informative way to learn about the diverse world of beans! Go and explore the different varieties.

The 'Bean of the Week' also features on the INCREASE social media channels:

For more information, please click on the boxes below.

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The bean profiles contain technical terms which are explained here:

Photoperiod Sensitivity

Plants receive triggering for flowering from different factors, one being the daylength or photoperiod. The wild ancestor of common bean originating from Meso America is photoperiod sensitive and has a requirement for short days. During domestication, beans became less sensitive to daylength, allowing them to grow in higher latitudes with longer days and spread globally. Our CSE bean lines vary in their photoperiod sensitivity.

Genetic Group

The wild common bean (Phaseolus vulgaris) originated in Mesoamerica and migrated to South America approximately 150,000 years ago, forming two distinct gene pools: Mesoamerican and Andean. Domestication occurred independently between 8,000 and 4,000 years ago in both regions, giving rise to two domesticated gene pools. The Andean gene pool was the first to reach Europe in 1529, introduced via Pizarro’s expedition from Peru. Its spread was influenced by Charles V, Pope Clement VII, and Piero Valeriano Bolzanio, who actively promoted its dissemination and authored the first manuscript on the common bean. Over time, the bean adapted to European climates and cuisine. Our research (Bellucci et al. 2023, Cortinovis et al. 2024) identified five genetic groups within European beans. The Andean gene pool contributed primarily through the Nueva Granada (A1) and Chile (A3) races, while the photoperiod-sensitive Peru race (A2) had limited influence. Additionally, Mesoamerican beans from high-altitude (Durango-Jalisco, M1) and low-altitude (M2) regions were successfully introduced.