So, we've documented close inbreeding, fathers breeding with daughters, granddaughters and even great-granddaughters.

因此，我们记录了近亲，父亲与女儿、孙女甚至曾孙女进行。

And with inbreeding that jeopardizes their long-term survival in the wild.

近亲不利于它们在野外长期生存。

For example, they keep a genetic bank to stop inbreeding at hatcheries.

例如，他们建立了一个基因库来防止孵化场里鲑鱼出现近亲。

But all 2,000 horses all living today are again at risk of inbreeding.

但是现存 2，000 匹马再次面临近亲危机。

Like gorillas and orangutans today, they lived in small, dispersed pockets, which means more inbreeding and less genetic diversity.

像如今大猩猩和猩猩，他们生活在分散小口袋里，这意味着更近亲和更少遗传。

But without genetic diversity, you can get health and behavior issues related to inbreeding.

但如果没有遗传，就会产生与近亲有关健康和行为问题。

Balto's genome showed lower rates of inbreeding than almost all modern dog breeds.

巴尔托基因组显示出比几乎所有现代犬种更低近亲率。

But inbreeding was a big problem on the island and the population is dying out.

但在这个岛上，近亲结婚是个大问题，人口也正在衰减。

We're not talking banjo-playing, King-of-Spain, Cersei-Jamie inbreeding, but every family tree inevitably grows forks.

我们不是在说演奏班卓琴西班牙之王瑟曦杰米近亲，但每棵家族树都不可避免地长出分支。

It was whispered in Vienna that the heir was clinically insane, that his family's inbreeding had caught up with him.

维也纳有传言说，这位继承人被诊断为精神失常，他家族近亲结婚害了他。

But the number one problem with inbreeding is that a possibility of creating mutations exist.

不过近亲最大问题是由此带来突变可能。

Marriage between cousins is common in Pakistan, and such inbreeding leads to a high incidence of genetic disorders.

近亲结婚在巴基斯坦很普遍，而这种近亲交配引发遗传疾病发病率很高。

Number two, you start to see really bad inbreeding.

第二， 你开始看到非常糟糕近亲。

That's when we started having problems of inbreeding depression that can kill the local population in a very short term.

从那时起开始出现近亲衰退问题，这可能会在很短时间内使当地种群灭绝。

With that in mind, how does inbreeding bode for humans?

考虑到这一点， 近亲对人类来说意味着什么？

If captive animals are too closely related, they're at risk of inbreeding.

如果圈养动物亲缘关系太近，它们就有近亲风险。

Also, be sure to check out our other show When Royal Inbreeding Went Horribly Wrong.

此外，请务必查看我们其他节目“当皇家近亲大错特错时” 。

This norm exists partially because reproduction among close relatives increases the likelihood of genetic inbreeding.

这种规范存在部分原因是近亲之间增加了基因近亲可能。

" With such small population sizes, we were expecting much higher inbreeding, " he said.

" 在如此小种群规模下，我们还以为近亲水平会高得。"

But 200 years of inbreeding have caused a wide range of genetic irregularities in their community.

但是 200 年近亲在他们社区中造成了广泛遗传不规则。