In contrast to homoploid hybrid species,polyploid species are easily diagnosed because of chromosome number changes associated with genome doubling.

与同体物种相比，因为与基因组加相关染色体数目,体物种很容易判断。

Scientists had theorized that homoploid hybrids would be more likely to form when the new species was adapted to life in an extreme environment.

科学家们有理论说同体混血是在极端环境下新品种更加适应生存需求时出现。