Abstract
For stable production of rice with high grain quality and good eating quality, we investigated the weight of brown rice, the rate of whole grains and protein content of milled grains formed on the main stem, and on the tillers at each nodal position and nodal order in rice cultivar Akitakomachi transplanted at the 4th leaf stage. The tillering rate and productive rate were stably higher on the main stem and primary tillers at the 4-7th nodal positions than on other primary tillers or secondary tillers. The weight of brown rice per panicle was stably heavier on the main stem and primary tillers at the 4-7th nodal positions than on the secondary tillers. Moreover the rate of whole grain was higher on the main stem and primary tillers at the 4-7th nodal positions than on the secondary tillers. Protein content of milled grains was lowest on the main stem and primary tillers at the 4-5th nodal positions, followed by the primary tillers at the 6th nodal positions and other tillers in this order. These results confirm that the main stem and primary tillers at the 4-7th nodal positions are useful for achieving stable production of rice with high grain quality and good eating quality.
