青藏高原青稞的淀粉特性

为给优质专用青裸品种的选育提供淀粉特性方面的参考依据，对122份来自青藏高原的青稞品种（系）的总淀粉含量和直链淀粉含量以及淀粉粘度性状进行了测定，并对这些品质性状进行了相关性分析和评价。结果表明，供试材料的淀粉特性差异较大，总淀粉含量变幅为51.26％～66．70％，平均59．89％；峰值粘度变幅为194～1135BU，平均710BU；直链淀粉含量和峰值粘度间存在极显著的相关性。在供试材料中，NB63—1、藏青80、康青3号等5个品种的总淀粉含量都超过了65％；北青三号和阿青4号的直链淀粉含量小于15%；而康青6号、拉萨勾芒等4个品种的直链淀粉含量在29％以上；NB63—1、康青3号、北青6号等4个品种的糊化温度在59℃以下，峰值粘度又都在1000BU以上。这些品种可用作未来优质专用青稞选育的种质材料。

Starch Properties of Naked Barley from Qinghai-Tibet Plateau in China

Starch is an important ingredient in naked barley that affects its processing and edible quali- ty. We studied the total starch contents and amylase contents of the 122 naked barleys from Qinghai- Tibet plateau according to the GB5006-85, GB/T 15683, determined their pasting properties by BRA- BENDER Micrio Visco-Amylo-Graph, and analysed the correlations between each quality characters. It was found that the diversity of starch properties in the cultivars studied was very high. The range of total starch content and peak pasting were 51.26%-66.70% and 194-1 135 BU, respectively, and the averages were 59.89% and 710 BU, respectively. Meanwhile, the correlation between starch content and pasting properties was significant, and the correlation coefficient between amylose content and peak pasting reached 0.85. In conclusion, Those information of those cultivars could be useful for breeding naked barley varieties with good starch quality.