中文摘要：

针对稻谷的吸湿性裂纹特性，设计了标准处理方法，并对参加浙江省“9410”计划联合品比试验的品系、部分早籼及早粳育种亲本进行抗裂性分析和等级评定。裂纹粒率最高的材料达73％，最低的仅0．5％，材料间差异显著（P=4．23×10^-16〈0．01）；其中，45份籼稻材料平均裂纹粒率为34．19％，8份粳稻材料平均裂纹粒率为55．44％，2份长粳材料平均裂纹粒率为2．25％。相关分析表明，品种的抗裂性与粒形呈极显著正相关（r=0．49＊＊）。

英文摘要：

A standard treatment was designed for hygroscopic grain fissure, and the anti-fissuring character among early rice varieties in Zhejiang Province, China was analyzed and classified. There was significant difference in the percentage of fissure grain among varieties （P=4.23 × 10^-16 〈0.01）. The highest percentage of fissure grain was 73 %, and the lowest was 0.5 %. The average percentages of fissure grain were 34.19 % for 45 indica rice, 55.44% for 8 japonica rice, and 2.25 for 2 japonica rice with long grain. The correlation analysis showed that there was a significant correlation between anti-fissuring character and grain shape （r=0.49 ＊＊ ）.