人工选种 meaning in English

artificial selecting

Because callow birds had not be marked with rings in the early period of protection , the pedigree was confused . so , it is very difficult to carry out artificial pairing . for its reference value to set reasonable breeding plan , the pedigree chart constructed by us can be applied in the protection to crested ibis . according to a good breeding project , inbreeding can be avoided and gene exchange can be increased
由于在朱?保护的初期阶段未能对离巢幼鸟进行环志，故现存朱?的谱系关系混乱，给人工选种配对带来了困难；我们所构建的谱系图可以在一定程度上应用到西北大学硕士学位论文沐潭鸟保护的实际工作中，为合理地制定繁殖考。