【摘要】 按照目前杭州及以南地区早稻育种一年三季 (当地早、晚 2季 ,海南冬繁 1季 )的实践 ,选择了14个不同表观直链淀粉含量 ( AAC)的早稻品种分别在杭州作早稻、翻秋和在海南冬季种植 ,对同一品种的 AAC、胶稠度 ( GC)、糊化温度 (碱消值 ,GT)以及淀粉粘滞特性 ( RVA谱 )的变化特征进行了研究 .结果表明 AAC和 GT经翻秋后较早季升高 ,海南介于两地之间 ;GC和淀粉粘滞性谱形状变化相对较小 .认为异季选择时对 AAC和 GT不宜施加过大的选择压 ,而 GC和 RVA谱则可作为决选的参考指标 ;早世代选择结合异地异季选择可能是改良早稻食用品质与蒸煮品质的有效途径更多还原

【Abstract】 Based on our early rice breeding practices in Hangzhou and in South China region, 14 varieties (or pure lines) with different apparent amylose content (AAC) were planted in early and late season in Hangzhou (30° N, HZE, HZL), Zhejiang province, East China, and winter season in Hainan province, South China (18°N, HN), respectively. The changes in eating and cooking quality of each variety, including AAC, gelatination temperature (GT, akaline spreading value), gel consistency (GC) and RVA profiles were observed and scored. The results indicated that the values of AAC and GT were higher in HZL than in HZE, and those of HN were in between. Non significant changes of GC and RVA profiles were observed among the three agroecological environments. It was suggested that GC and RVA profiles could be served as reference indicators for selecting the early rice with good quality. It seemed unnecessary to exert strict selection pressure upon the AAC and GT during the plant grown in different seasons.更多还原