寒地稻区水稻裂纹米发生机理及其防御对策的研究 Ⅰ·品种(系)和品质理化指标与裂纹米之间的关系

Studies on Ocurrence Mechanism and Preventive Measure of Crackle-Rice in Cold Region Ⅰ.The Relationship between Chemical and Physical Character of Variety and Crackle-Rice

通过对第二积温带品种(系)的品质理化指标与裂纹米率关系的研究,结果表明裂纹米率与长宽比、整精米率呈极显著负相关,与糙米率、直链淀粉含量不相关,与蛋白质含量、胶稠度呈显著负相关;裂纹米的发生与品种(系)本身遗传有关,品种之间达极显著差异;对寒地水稻裂纹米率影响较大的是稻谷的胶稠度、长宽比,而整精米率影响较小。

The relations between chemical and physical datum of sixteen varieties and crackle rice were studied. The results indicated that the relations were sisaificanfly negative correlation between crackle-rice and the ratio of length and width, head milled rice, consistency and protein content. The relation was not remarkable between crackle-rice and milled rice rate, and ifs related to amylose content occlenence. Producing mechanism of crabbed rice was related to genetic character of variety, and the difference was significant among varieties. Occurrence of crackle-rice was influenced by the ratio of length to width, consistency, and the influence of head milled rice on it was small.