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1·As we have previously reported, Amur tiger populations have dropped precipitously in recent years to around 250 animals, and the species faces a genetic bottleneck that puts it at risk of inbreeding.

我们之前的报道指出，它们的数量在最近几年锐减到250只左右，这个种族面临着遗传瓶颈，这将它们推入了近亲繁殖的危险境地。

2·Genetic variation is major study content in conservation genetics. In small population, genetic variation loss because of bottleneck effect, inbreeding, founder effect, and genetic drift.

遗传变异性是遗传保护研究的主要内容，在小种群中，往往由于瓶颈效应、近亲繁殖、奠基者效应和遗传漂变等使得遗传变异性减少。

3·Genetic research experts agreed that developments in genetics will profoundly effect medicine for the better, they could also cause a significant bottleneck for health care organizations.

基因研究 专家认为遗传学方面基因研究的进步能够显著改进用药状况，它们也能够使得现在的医疗 保健机构处于上下两难的瓶颈状态。