高抗性淀粉粳稻新品系稻米淀粉链长分布与主要品质特征差异

被引:26
作者
张淑梅 [1 ,2 ]
张建明 [1 ]
李丁鲁 [3 ]
李茂柏 [1 ]
王慧 [1 ,4 ]
朴钟泽 [1 ]
邹德堂 [2 ]
机构
[1] 上海市农业科学院作物育种栽培研究所
[2] 东北农业大学农学院
[3] 韩国农村振兴厅农业生命工学研究院
[4] 安徽农业大学农学院
关键词
水稻; 抗性淀粉含量; 支链淀粉链长分布; 糊化特征;
D O I
暂无
中图分类号
S511.22 [];
学科分类号
0901 ;
摘要
【目的】通过对水稻抗性淀粉性状的遗传研究,为高抗性淀粉水稻资源创新与育种提供理论和实践依据。【方法】以抗性淀粉含量有显著差异的粳稻品系为材料,比较分析高低抗性淀粉粳稻品系类型间的支链淀粉链长分布、稻米RVA谱特性值、膳食纤维和直链淀粉含量等主要品质特性的差异及其相关性。【结果】高低抗性淀粉水稻品系间支链淀粉链长分布差异显著,高抗性淀粉水稻品系的支链淀粉中短链部分即聚合度为5~12所占的相对百分比率显著低于低抗性淀粉类型品系,而长链尤其是聚合度为13以上的长链比率明显高于低抗性淀粉类型品系。膳食纤维和直链淀粉含量,高抗性淀粉品系显著高于低抗性淀粉品系,最高黏度值、最终黏度值、热浆黏度值和崩解值等,高抗性淀粉品系均显著或极显著低于低抗性淀粉类型品系。抗性淀粉含量与支链淀粉短链聚合度(DP≤12)呈极显著负相关,但与支链淀粉的中长链聚合度(12<DP≤36)呈极显著正相关,与直链淀粉含量和膳食纤维含量呈极显著正相关。【结论】水稻中支链淀粉的链长分布、直链淀粉含量和稻米RVA谱特性值与稻米抗性淀粉含量关系密切,在育种实践中可作为育种选择指标之一。
引用
收藏
页码:2237 / 2243
页数:7
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