In 1980 IBPGR published a minimal list of descriptors for maize (Zea mays L.) following the third meeting of the IBPGR Maize Advisory Committee. This list was revised by IBPGR and CIMMYT in consultation with experts. The descriptors described here are related to the characterization (consists of recording those characters which are highly heritable, can be seen by the eye and are expressed in all environments).
IBPGR
| Code | Term | Description |
|---|---|---|
| 1 | Absent | |
| 2 | Present |
| Code | Term | Description |
|---|---|---|
| 1 | Absent | |
| 2 | Present |
| Code | Term | Description |
|---|---|---|
| 1 | Absent | |
| 2 | Present |
| Code | Term | Description |
|---|---|---|
| 1 | Absent | |
| 2 | Present |
| Code | Term | Description |
|---|---|---|
| 1 | Absent | |
| 2 | Present |
Legend:
Dense
Medium
Lax
Legend:
Medium 25-75 degree
Small < 25 degree
Large >75 degree
Legend:
Strongly curved
Curved
Straight
| Code | Term | Description |
|---|---|---|
| 1 | Weak | |
| 2 | Strong | |
| 3 | Absent | |
| 4 | Present |
| Code | Term | Description |
|---|---|---|
| 1 | Cylindrical | |
| 2 | Conico-cylindrical | |
| 3 | Conical |
| Code | Term | Description |
|---|---|---|
| 1 | White | |
| 2 | Yellow | |
| 3 | Yellow-orange | |
| 4 | Yellowish-white | |
| 5 | Blue-black | |
| 6 | Orange | |
| 7 | Dark-red | |
| 8 | Mixed color | |
| 9 | Red | |
| 10 | Yellowish white | |
| 11 | Red Orange | |
| 12 | Orange | |
| 13 | Blue black | |
| 14 | Mixtured color | |
| 15 | Mixture | |
| 16 | Yellow Orange |
| Code | Term | Description |
|---|---|---|
| 1 | Straight | |
| 2 | Spiral | |
| 3 | Irregular |
| Code | Term | Description |
|---|---|---|
| 1 | White with cap | |
| 2 | Yellow | |
| 3 | White | |
| 4 | Yellow with cap | |
| 5 | Orange | |
| 6 | Blue-black | |
| 7 | Dark red | |
| 8 | Mixed color | |
| 9 | Red | |
| 10 | Blue black | |
| 11 | mixture |
| Code | Term | Description |
|---|---|---|
| 1 | White | |
| 2 | Light purple | |
| 3 | Dark purple |
| Code | Term | Description |
|---|---|---|
| 1 | Pointed | |
| 2 | Shrunken | |
| 3 | Round | |
| 4 | Indented |