Four out of fifteen rice lines showed unique characteristics
on vitamin B1 content in the brown rice and
milled rice. Rice lines which have highest vitamin B1
in the brown rice were B10267-4-PN-6-2-3-2-2-2-3-3-2
(3.03 mg 100 g-1), B10876H-MR-2 (2.13 mg 100 g-1),
B10531E-KN-1-2-PN-1-4-2 (1.33 mg 100 g-1), and
B12411E-RS*-1-2-1 (1.21 mg 100 g-1). However, after
milling, 43-92% of their vitamin B1 were lost; the least
was on line B12411E-RS*-1-2-1 (1.21 mg 100 g-1)
which was only as much as 4%.
Three out of fifteen rice lines had highest folic acid
in brown rice, i.e. BP400G-PN-12-3-6 (158.5 μg 100 g-
1), B10876H-MR-2 (152.0 μg 100 g-1), and B11742-RS*-
2-3-MR-5-5-1-Si-1-3 (100.0 μg 100 g-1). After milling,
B10876H-MR-2 had the highest folic acid content of
52.0 μg 100 g-1, much higher than that of Ciherang.
This study indicates the importance of having a
suitable milling instrument that could minimize the
loss of vitamin B1 and folic acid. The study also
suggests the importance of creating new rice lines
which have high nutrient and resistant to the milling
process.