TY - RPRT TI - Widespread Negative Frequency-Dependent Selection Maintains Diversity in the Legume-Rhizobia Symbiosis: Balancing nodulation may explain the paradox of rhizobium diversity AU - Siler, E. AU - Friesen, M. L. PY - 2017 DO - 10.1101/153866 UR - https://www.biorxiv.org/content/10.1101/153866v1 ID - 10.1101/153866 ER -