being a mixture of breeds, often as a result of the intentional creation of a new type of animal or plant

These horses are of proven crossbred ancestry. 这些都是经过验证的杂交马。

The crossbred seedlings can be tested right away to see if the desired genetic changes occurred. 可以立即对杂交苗进行测试，看是否发生了所期待的遗传变化。