varietal resistance

例句：

1. 1.The cultivation of different varieties of wheat has a significant impact on the yield.
   种植不同品种的小麦对产量有显著影响。
2. 2. Varieties with higher resistance to pests are preferred for crop production.
   对病虫害具有更高抵抗力的品种被优先用于农作物生产。
3. 3. Varietal resistance is an important factor in crop disease management.
   品种抗性是作物病害管理中的一个重要因素。