1. The introgressant line showed improved resistance to the disease compared to the parental line.
和亲代比起来，这个细胞系对这种疾病的抗性有所提高。

2. The introgression of genes from one species into another is a common strategy in plant breeding.
将一个物种的基因导入另一个物种中是植物育种中常用的策略。