| Code | Definition | Number of Accessions |
| 1 | without any anthocyanin check Ames 23624 ANST 1 = 80.8% | 54 |
| 2 | anthocyanin barely detectable check Ames 23639 ANST 2 = 38.2% | 55 |
| 3 | (1=without anthocyanin, 9=most anthocyanin) check PI 478378 ANST 3 = 30% | 52 |
| 4 | (1=without anthocyanin, 9=most anthocyanin) check Ames 18564 ANST 4 = 25.7% | 48 |
| 5 | in the middle between green and violet stem check Ames 18577 ANST 5 = 20% | 42 |
| 6 | (1=without anthocyanin, 9=most anthocyanin) check Ames 21655 ANST 6 = 29.4% | 39 |
| 7 | (1=without anthocyanin, 9=most anthocyanin) check Ames 21655 ANST 7 = 17.6% | 36 |
| 8 | (1=without anthocyanin, 9=most anthocyanin) check Ames 18585 ANST 8 = 21.7% | 31 |
| 9 | the bottom of the stem is completely violet check PI 174130 ANST 9 = 59.5% | 30 |