This study helps untangle the multiscale processes involved in the relationships between crop genetic and human cultural diversity patterns. It quantifies the effect of homophily on seed exchange networks and details the major role played by kinship systems. By bridging anthropology and crop genetics through an in-depth social network analysis, this study provides a better understanding of the social processes involved in crop diversity dynamics. These findings urgently call for a specification of social and cultural factors in crop meta-population models, which has been neglected so far.
Labeyrie V., Thomas M., Muthamiad Z.K., Leclerc C. (2016) Seed exchange networks, ethnicity, and sorghum diversity. Proceedings of the National Academy of Sciences 113(1): 98-103. <doi: 10.1073/pnas.1513238112>