小麦抗梭条花叶病品种的田间筛选及抗性遗传研究初报

对3931份中间材料、163份品种（系）20份区试新品系进行了梭条花叶病的抗性鉴定，筛选出683份抗病中间材料、32份抗病品种（系）4份区试品系，说明目前生产上应用面积比较大的品种和发挥重要作用的骨干亲本中抗源比较丰富。初步研究了梭条花叶病对小麦产量及构成因子的影响和抗性遗传。结果表明，小麦发生病害后，穗粒数、千粒重、有效穗，株高一般发生降低或减少，产量损失10％－30％；抗病特性为细胞核遗传，抗性基因为显性，属多基因控制。

Primary Study on WSSM Resistance and Field Screening of Wheat

medi materials,163 variieties (lines),and 20 new lines in region test were conducted in wheat spindle streak mosaic disease (WSSM)evaluation, and screened out 683, 32, and 4 materials with high-resistance to WSSM disease, from above materials or varieties (lines), respectively. There were much sources of resistance to WSSM in wheat varieties. These varieties had been distributed in large areas, and many of which had been used for wheat breeding. The effect of WSSM on yield and its components, and the inheritance of the resistance to the disease in wheat were studied in this paper. The results showed that grains per spike, 1000 grain weight, effective spikes and plant height in wheat were usually decreased by WSSM,which resulted in yield lossing from 10 to 30 percents. The inheritable factors of controlling resistance to the disease were in karyon, and controlled by a few dominant genes.