论文部分内容阅读
以5个对黄萎病抗性不同的棉花品种及10个棉花杂交株系为材料,在黄萎病田连续3年种植,与常规田种子进行发芽率、发芽指数及带菌率对比测定,对结果做统计分析。结果显示,病田种子带菌率明显增高,由平均带菌率0.499%上升到2.28%,增加了1.781%;发芽率相较常规田种子相差不大,常规田种子平均发芽率为98.49%,病田种子平均发芽率为97.78%;而病田种子发芽指数有一定程度的降低,发芽指数由49.436降至45.719。杂交株系M 37与M 44相比,杂交株系M 37种子对黄萎病菌感染耐受能力较强,病田种植3年种子平均带菌率为1.502%,比杂交株系M 44低1.498%。
Five cotton cultivars with different resistance to Verticillium dahliae and 10 cotton hybrids were planted in Verticillium dahliae field for three consecutive years. The germination rate, germination index, The results of statistical analysis. The results showed that the rate of seed germination in the field was significantly increased from 0.499% to 2.28%, an increase of 1.781%. The germination rate was similar to that of the conventional field, the average germination rate was 98.49% The average seed germination rate was 97.78%, while the seed germination index of the disease field decreased to a certain degree, and the germination index decreased from 49.436 to 45.719. Compared with M 44, the hybrid seed of M 37 was more resistant to Verticillium dahliae infection, the average rate of 3-year seed germination was 1.502%, which was 1.498% lower than that of M 44, .