inbreeding

1.This has led some breed clubs to discourage the use of linebreeding or inbreeding in an attempt to maintain gene pool diversity.

因此，这足以证明受欢迎公犬对其品续有着潜移默化影响。

2.There is also a general lowering of vigor in inbred stock (inbreeding depression), which is especially pronounced amongst normally outbreeding populations.

而杂合型出现频率降低，因而降低了群基因潜在可变性。