Table 3.
Positional variations in phytic acid (PA) concentration, grain weight, and the molar ratios of PA/Zn and PA/Fe in six different rice cultivars
| Cultivar | Grain position | PA concentration (mg/g) |
Grain weight (mg) |
PA/Zn molar ratio |
PA/Fe molar ratio |
||||
| PR | SR | PR | SR | PR | SR | PR | SR | ||
| 98110 | TR | 4.68b | 4.55b | 25.47a | 20.12c | 18.35c | 18.34c | 45.17e | 47.09d |
| MR | 4.89a | 4.49b | 24.35a | 20.63c | 19.74b | 18.50c | 49.00c | 47.81cd | |
| BR | 5.07a | 5.25a | 22.16b | 17.06d | 21.39a | 22.85a | 56.02b | 60.58a | |
| Mean 1 | 4.88 | 4.76 | 23.99 | 19.27 | 19.83 | 19.89 | 50.06 | 51.83 | |
| Mean 2 | 4.82 | 21.63 | 19.86 | 50.95 | |||||
| CV | 6.24% | 14.10% | 9.48% | 11.80% | |||||
| HIPj | TR | 4.54a | 4.43ab | 24.12a | 19.05d | 16.82a | 16.90a | 37.73c | 40.26b |
| MR | 4.18c | 4.32ab | 23.16b | 19.01d | 16.03b | 16.91a | 36.54cd | 39.17b | |
| BR | 3.68d | 4.23c | 20.50c | 18.09e | 14.73c | 17.17a | 35.00d | 42.39a | |
| Mean 1 | 4.13 | 4.32 | 22.59 | 18.72 | 15.86 | 16.99 | 36.42 | 40.61 | |
| Mean 2 | 4.23 | 20.65 | 16.43 | 38.52 | |||||
| CV | 7.10% | 11.89% | 5.57% | 6.90% | |||||
| Xiushui63 | TR | 5.64bc | 5.60c | 26.54a | 23.04c | 24.66d | 25.24d | 58.26c | 60.30c |
| MR | 6.13a | 6.06a | 25.68ab | 22.40c | 27.88c | 28.48b | 65.70b | 66.16b | |
| BR | 5.97ab | 5.98ab | 25.26b | 22.45c | 28.59b | 29.26a | 68.62b | 71.19a | |
| Mean 1 | 5.91 | 5.88 | 25.83 | 22.63 | 27.04 | 27.66 | 64.19 | 65.88 | |
| Mean 2 | 5.90 | 24.23 | 27.35 | 65.04 | |||||
| CV | 3.77% | 7.48% | 7.01% | 7.56% | |||||
| Xiushui994 | TR | 4.58ab | 4.46b | 25.71a | 23.18ab | 21.98c | 21.80c | 42.37d | 43.81c |
| MR | 4.28c | 4.36c | 24.14a | 18.62c | 21.52c | 22.07c | 41.84d | 44.67c | |
| BR | 4.43bc | 4.64a | 20.29bc | 17.57c | 23.06b | 24.69a | 48.31b | 51.78a | |
| Mean 1 | 4.43 | 4.49 | 23.28 | 19.79 | 22.19 | 22.85 | 44.17 | 46.75 | |
| Mean 2 | 4.46 | 21.58 | 22.52 | 45.46 | |||||
| CV | 3.01% | 15.04% | 5.27% | 8.47% | |||||
| Chunjiang15 | TR | 4.87bc | 4.90b | 27.69a | 21.41d | 19.63c | 21.88b | 50.10c | 52.92bc |
| MR | 4.98ab | 5.09a | 26.51ab | 25.07bc | 23.11a | 22.72b | 54.49b | 57.78a | |
| BR | 4.85bc | 4.75c | 24.68c | 21.03d | 22.81b | 23.23a | 57.74a | 58.07a | |
| Mean 1 | 4.90 | 4.91 | 26.29 | 22.50 | 21.85 | 22.61 | 54.11 | 56.26 | |
| Mean 2 | 4.91 | 24.40 | 22.23 | 55.18 | |||||
| CV | 2.38% | 11.01% | 6.12% | 5.90% | |||||
| Xiushui11 | TR | 4.23b | 4.31a | 29.00a | 28.61ab | 17.28c | 18.15b | 36.12c | 37.74c |
| MR | 4.49a | 4.25b | 28.48ab | 24.26c | 18.68b | 18.09b | 40.09b | 39.13b | |
| BR | 4.51a | 4.38a | 27.49b | 19.73d | 20.21a | 19.98a | 43.62a | 43.45a | |
| Mean 1 | 4.41 | 4.31 | 28.32 | 24.20 | 18.72 | 18.74 | 39.94 | 40.11 | |
| Mean 2 | 4.36 | 26.26 | 18.73 | 40.03 | |||||
| CV | 2.74% | 13.84% | 6.14% | 7.57% | |||||
PR: primary rachis; SR: secondary rachis; TR: top rachis; MR: middle rachis; BR: bottom rachis. The crossing column between TR and PR means TPR (top primary rachis), and the corresponding expressions were for TSR (top secondary rachis, TR-SR), MPR (middle primary rachis, MR-PR), MSR (middle secondary rachis, MR-SR), BPR (bottom primary rachis, BR-PR), and BSR (bottom secondary rachis, BR-SR), respectively. Mean 1 is the average of three different positions for PR or SR; Mean 2 is the average of all six different positions; CV is the coefficient of variation. The values followed by the same letters within a column are not significantly different in term of the same cultivar (P>0.05)