backcross

backcross

[bækk'rɒs]

n.回[逆]交，回交杂种;

vt.使回交;

vi.回交;

复数： backcrosses 过去式： backcrossed 过去分词： backcrossed 现在分词：backcrossing 第三人称单数： backcrosses

例句:

1、

Two molecular methods were employed to successfully disclosed characters of the single hybrid zone: ( 1) this hybrid zone was composed of parental species, F1s, F2s and backcross derivatives;

我们通过分子测序和分子标记两种方法，揭示了该杂交区的性质：（1）该杂交区的构成是由亲本、F1代、F2代及回交后代组成；

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2、

The resistance to fluorine is affected by male-parent effect and there exists a difference between cross and backcross in non-female parent.

抗氟性还受父本的影响，表现非母体的正反交差异。

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3、

Excellent line with marking character was selected from F_4, and this line's economic character was greatly influenced by backcross parent.

在F4，所选得具指示性状的优系，其经济性状受父本影响较大。

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