Comparison on Milling Quality of Grains at Different Positions Between Erect Panicle and Curved Panicle Varieties in Rice

Differences in milling quality among the grains at different positions and different grains between the erect and curved panicle types were studied.The results showed that the rates of brown rice,milled rice and head rice and the grain weight of the curved-panicle type rice were higher than those of erect-panicle type rice,of which the difference in head rice rate reached significant level.Generally,at the same positions of a panicle,the brown rice rate,milled rice rate,head rice rate and the weight of the grains on the primary branches were greater than those on the secondary branches in both of the two types.On the primary branch,the rates of brown rice,milled rice and head rice of the first grain were the least and those of the second or the third grain was the greatest.The difference in the milling quality of the grains on the secondary branches at the same parts between the two panicle types was greater than that on the primary branches regardless of panicle type.The distribution of grain weight on the panicles was consistent in the two panicle types.Therefore,the milling quality of erect-panicle rice could be improved through selection in rice breeding.