Genetic variation in host selectivity and adaptive strain enrichment in legume-rhizobia symbiosis: host-dependent, imperfect processes correlate with nodule morphology.

Abstract excerpt

Mutualism breakdown can be prevented if partner species preferentially select and reward partners that provide greater benefit. We examined these two components using the legume Medicago truncatula and its nitrogen-fixing symbiont Sinorhizobium meliloti. First, we re-analysed data from 202 accessions to show significant genetic variation in the capacity of Medicago to restrict strain diversity, finding that hosts...

Topics

• Symbiosis
• Sinorhizobium meliloti
• Medicago truncatula
• Root Nodules, Plant
• Genetic Variation
• Genome-Wide Association Study
• Nitrogen Fixation