TABLE 1.
Bacterial strains used in this study
| Strain | Characteristics | Source |
|---|---|---|
| S. fredii | ||
| USDA191 | From soil, Shanghai Province, China; Fix+ with Glycine max cv. Peking and McCall | Keyser et al. |
| USDA192 | From Glycine soja; Fix+ with G. max cv. Peking; Nod− with G. max cv. McCall | Keyser et al. |
| USDA201 | From G. max; Fix+ with cv. Peking; Nod− with cv. McCall | Keyser et al. |
| USDA205 | From G. max; Fix+ with cv. Peking; Nod− with cv. McCall | Keyser et al. |
| USDA208 | From G. max; Fix+ with cv. Peking; Nod− with cv. McCall | Keyser et al. |
| USDA257 | From G. max; Fix+ with cv. Peking; Nod− with cv. McCall | Keyser et al. |
| USDA196 | From rice field soil, Hubei Province, China; nodulates G. max | Dowdle & Bohlool |
| USDA197 | From rice field soil, Hubei Province, China; nodulates G. max | Dowdle & Bohlool |
| HH103 | From rice field soil, Hubei Province, China; nodulates G. max | Dowdle & Bohlool |
| HH303 | From rice field soil, Hubei Province, China; nodulates G. max | Dowdle & Bohlool |
| Sinorhizobium sp. strain NGR234 | From Lablab purpureus; broad host range | Trinick |
| S. meliloti | ||
| AK631 | exoB mutant of wild-type strain Rm41 | Bánfalvi et al. |
| Rm1021 | Streptomycin-resistant derivative of wild-type strain RCR2011 | Walker et al. |
| NRG23 | Wild-type from Medicago sativa L. | Olsen et al. |
| NRG53 | Wild-type from M. sativa L. | Olsen et al. |
| NRG133 | Wild-type from M. sativa L. | Olsen et al. |
| NRG185 | Wild-type from M. sativa L. | Olsen et al. |
| NRG247 | Wild-type from M. sativa L. | Olsen et al. |
| NRG286 | Wild-type from M. sativa L. | Olsen et al. |
| B. japonicum USDA110 | Wild-type strain from G. max | Stacey et al. |
| R. etli CE3 | Streptomycin-resistant derivative of wild-type strain CFN42 | Noel et al. |