这两阶段杂交育种的结果是，尽管杂交牡蛎重来没有真正意义上的自身繁殖，但可以为市场提供大量的杂交牡蛎。
The result of this two-stage crossbreeding process is that, though none of the hybrids involved breeds true by itself, a marketable hybrid oyster can nevertheless be turned out in large quantities.
现代育种技术迅猛发展，水稻品种的选育和推广速度越来越快，大量品种的被审定和推广。
With the rapid development of modern breeding techniques, breeding and promotion of rice varieties faster and faster, a large number of species were determined and promoted.
四倍体育种中染色体组操作的结果除了产生整倍体外，还产生大量的非整倍体。
Manipulation of chromosome in tetraploid breeding resulted in not only euploids, but also a great many aneuploids.
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