| Cowpea genotype | LSMean* protein content (%) | Significant at P = 0.05 |
| Early Scarlet | 27.4 | A# |
| 09-204 | 26.9 | A |
| 01-1781 | 25.9 | B |
| 09-393 | 25.9 | BC |
| 09-208 | 25.6 | BCD |
| 07-303 | 25.2 | BCD |
| AR Blackeye #1 | 24.9 | CDE |
| 09-714 | 24.9 | DE |
| Ebony | 24.9 | DE |
| 09-655 | 24.0 | EF |
| 09-741 | 23.7 | F |