摘要： 利用404份高代品系(试验Ⅰ)和175份山东省主栽品种及高代品系(试验Ⅱ),研究了1BL/1RS易位对小麦揉面参数的影响,探讨利用揉面特性鉴定1BL/1RS易位系的方法。结果表明,1BL/1RS易位导致小麦的揉面特性显著变劣,1BL/1RS易位系的揉面时间、峰值带宽及峰后1 min带宽显著低于非1BL/1RS易位系,而衰落角和带宽比(峰值带宽/峰后1 min带宽)显著高于非1BL/1RS易位系。易位系的揉面谱带的主要特征为峰后1 min谱带急剧衰落并变窄,带宽比显著增大。带宽比1.6可作为判断易位系的有效指标,即大于或等于1.6为1BL/1RS易位系,小于1.6为非1BL/1RS易位系,准确率达85.2%(试验Ⅰ)和96.8%(试验Ⅱ)。因此,揉面图谱可作为快速有效鉴别1BL/1RS易位系的新方法。

关键词: 普通小麦, 1BL/1RS易位, 揉面特性

Abstract: To develop a new method for 1BL/1RS translocation identification with mixograph parameters,404 advanced lines(Experiment I)and 175main cultivars of Shandong Province and advanced lines(Experiment II)were used in this study.The genetic effect of 1BL/1RS translocation on mixograph parameters was investigated .1BL/1RS translocation lines showed significantly shorter mixing time,less bandwidth of peak and bandwidth after 1 min peak,and higher angle of descent and the bandwidth ratio(the ratio of bandwidth of peak/bandwidth after 1 min peak)in comparison with non -1BL/1RS translocation lines .It indicated that the 1BL/1RS translocation has deleterious effects on mixograph parameters . Mixograph of the 1BL/1RS translocation was characterized with the bandwidth sharply declining and narrowing after 1min peak,and increasing the bandwidth ratio ,whereas the bandwidth of non -1BL/1RS translocations declined gently after 1 min peak or had a longer mixing tolerance,and had a little variation about the bandwidth ratio .Furthermore,85 .2 %(Experiment I)and 96 .8 %(Experiment II)accuracies were achieved in grouping the 1BL/1RS translocation and non -1BL/1RS translocation on the basis of the band width ratio,i .e ., 1BL/1RS translocation line had a value more than or equal to 1 .6,and non -1BL/1RS translocation line had a value smaller than 1 .6 .Therefore ,mixogram and its parameters could be used as a new method to determine the presence of 1BL/1RS translocation quickly and efficiently.

Key words: Commonwheat(TriticumaestivumL.), 1BL/1RStranslocation, Mixogramcharacteristics

中图分类号: 

• S512.03