无性系的

例句：

1. 1. The plant is propagated through asexual reproduction, which is known as the "self-fertilization" method.
   这种植物通过无性繁殖进行传播，被称为“自交”方法。
2. 2. In some species, sexual reproduction is not possible due to environmental constraints, resulting in an asexuallineage.
   在有些物种中，由于环境限制，无法进行有性生殖，导致形成了一个无性系。
3. 3. Asexual reproduction is often used in conservation efforts to preserve genetic diversity within a population.
   无性繁殖在保护工作中常被用来在种群内保存遗传多样性。