| Accession | Mean Root Area (cm2) |
| Rondo | 0.8 f |
| CL163 | 1.1 ef |
| B84 | 1.4 ef |
| B83 | 1.5 ef |
| B8 | 1.7 de |
| B81 | 1.9 c-e |
| PI312777 | 2.1 b-e |
| PI338046 | 2.2 a-d |
| B2 | 2.3 a-d |
| S94 | 2.4 a-c |
| B14 | 2.6 ab |
| Rex | 2.6 a-d |
| S97 | 2.6 ab |
| B34 | 2.8 a |