| In order to determine the resistance level of different wheat varieties(lines) to wheat yellow mosaic virus disease in Huanghuai wheat region,146 wheat varieties(lines) were identified for resistance to wheat yellow mosaic virus disease in two serious disease fields in Luohe city,Henan province,2016-2017. Plant height,number of panicles per plant,grain number per spike and 1 000-grain weight were analyzed under different resistance levels.The results showed that there were 12 immune varieties(lines),such as Cunmai 16,Caizhi 141 and Zhongmai 7,accounting for 8.2%; 37 high resistant varieties(lines),such as Zhengmai 366,Zhoumai 26 and Zhengmai 119,accounting for 25.3%; 28 medium resistant varieties(lines),accounting for 19.2%; 42 medium susceptible varieties(lines),accounting for 28.8%; and 27 susceptible varieties(lines),accounting for 18.5%.Wheat yellow mosaic virus disease had significant effects on plant height,number of panicles per plant,grain number per spike and 1 000-grain weight. Compared with the immune group,the mean panicles per plant in the high resistance group,the middle resistance group,the middle sensitivity group and the susceptible group decreased by 4.01%,24.55%,33.41% and 38.34%,respectively. With the immune group as the benchmark,the corrected deviation rates of plant height were-0.71%,-6.16%,-8.82% and -11.72%; the corrected deviation rates of grains number were:-0.66%,-13.61%,-23.33% and -26.40%; and the corrected deviation rates of 1 000-grain weight were -3.00%,-4.79%, -7.73% and -8.83%,respectively. |
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