Table 1. Characteristics of the grain yield and quality of 4 tongil-type and 5 japonica-type varieties
| Rice type | Variety | Year of development | Grain shape (L/W)1) | Grain yield (kg/10a) | Amylose (%) | Protein (%) | Resistant starch (%) |
| Tongil-type | Areum | 1999 | 2.17 | 741 | 19.9 | 6.9 | ≤1.0 |
| Namcheon | 1995 | 1.79 | 663 | 19.3 | 6.0 | ≤1.0 |
| Hanareum3 | 2015 | 2.23 | 753 | 18.2 | 7.3 | ≤1.0 |
| Hanareum4 | 2016 | 2.04 | 797 | 18.5 | 6.9 | ≤1.0 |
| Japonica-type | Unkwang | 2004 | 1.77 | 586 | 19.1 | 6.2 | ≤1.0 |
| Daebo | 2011 | 1.67 | 593 | 19.2 | 5.5 | ≤1.0 |
| Goami4 | 2009 | 1.79 | 453 | 31.8 | 6.9 | >10.0 |
| Dodamssal | 2013 | 1.78 | 529 | 42.8 | 6.7 | >10.0 |
| Hwaseonchal | 1992 | 1.93 | 523 | 5.0 | 6.6 | ≤1.0 |
1)Grain shape (L/W) was presented as the value of length (L) divided by width (W) of brown rice.