TABLE 1.
Strains, presence of nodD2, host origin, growth cycle (habit), and center of diversity of the 13 R. leguminosarum bv. trifolii strains investigated in this section
| Strain | nodD2 | Host origin (legume typec) | Bacterial habit | Center of diversityd | Source or reference(s) |
|---|---|---|---|---|---|
| WSM1325 | No | Unknown (A) | Most effective on annual clovers | E-M | (79) |
| SRDI565 | No | T. subterraneum (A) | Primarily annual, and one perennial species of Mediterranean origin | - | (80) |
| SRDI943 | No | T. michelianum Savi cv. Paradana (A) | Primarily annual, and some perennial species of Mediterranean origin; (Fix−) nodules with the perennial clovers T. pratense and T. polymorphum | - | (81) |
| WSM1689b | No | T. uniflorum (P) | Single perennial species | E-M | (28, 39) |
| CB782 | No | T. semipilosum (P) | Perennial | A | (28, 82) |
| TA1 | Yes | T. subterraneum (A) | Annual and perennial species; broad host range on European and Mediterranean clovers | E-M | (28, 83) |
| CC275e | Yes | T. repens (P) | Range of annual and perennial species | E-M | This study/(32, 84) |
| CC283ba | Yes | T. ambiguum (P) | Highly effective on perennial species T. ambiguum | E-M | (28, 64) |
| WSM2297 | Yes | T. africanum (P) | Limited info/perennial | A | (32) |
| WSM2012a | Yes | T. rueppellianum (A) | Limited annual and perennial species | A | (28, 85) |
| WSM2304a | Yes | T. polymorphum (P) | Highly competitive on perennial species T. polymorphum | S-A | (28, 86) |
| WSM597a | Yes | T. pallidum (A) | Effective on perennial species T. polymorphum | S-A | (32, 87) |
| CC278f | Yes | T. nanum (P) | Perennial | N-A | (28) |
a
Known to have a narrow host range.
b
Forms either no nodules or ineffective nodules on a range of annual and perennial species; forms highly effective nodules on a single host, T. uniflorum.
c
A, annual clover species; P, perennial clover species.
d
E-M, Euro-Mediterranean; A, Africa; S-A, South America; N-A, North America; -, unspecified.