Table 2. The Ve-R7 duration ranges of the MG reference varieties from the US in Heihe, Harbin, Jining and Wuhan in China.
| MG | Days from emergence (Ve) to physiological maturity (R7) | |||
|---|---|---|---|---|
| Heihe | Harbin | Jining | Wuhan | |
| 000 | 80–90 | — | <71* | — |
| 00 | 91–101 | — | — | |
| 0 | 102–112 | 101–105 | 71–81 | — |
| I | — | 106–110 | 82–92 | — |
| II | — | — | 93–103 | — |
| III | — | — | 104–114 | — |
| IV | — | — | 115–125 | — |
| V | — | — | 126–138 | — |
| VI | — | — | 139–151 | 141–151 |
| VII/VIII | — | — | ≥152* | 152–163 |
| MGIX/X | — | — | ≥164 | |
* MG000/00MGVII/VIII and MGIX/X were merged respectively at Jining and Wuhan because the groups cannot be distinguished.