So we're going from a diploid organism to a tetraploid organism.

因此，我们正从二倍生物转变为四倍生物。

Two years ago, the first potato genomes for these tetraploid cultivars were released.

两年前，这些四倍品种的首个土豆全基因组被发布。

As that complicated genetic tetraploid nature has not only thwarted breeders, it's made things hard for geneticists too.

这种复杂的四倍让育种者感到棘手，也给学家带来了挑战。

And so bread wheat, or the wheat that we use to make bread, some of that wheat is actually tetraploid or hexaploid.

因此， 面包小麦， 也就是我们用来制作面包的小麦，其中一部分实际上是四倍或六倍的。

You see, the potato is tetraploid, meaning that instead of having two sets of chromosomes, like you and I do, potatoes have four.

你知道，土豆是四倍，这意味着它像你我那样有两套染色，而是有四套。

And so what we think happened in this rat is they actually shed that extra xy chromosome or those sex chromosomes and they're able to reproduce as a tetraploid animal.

因此，我们认为在这种老鼠身上发生的情况是，它们实际上失去了那个额外的XY染色或那些染色，并且能够以四倍动物的身份进行繁殖。