The experimental results indicated the yield of intervarietal hybrids from geographical distance and good varieties would raise 10% than their parents.
选择地理远缘、优良的爆裂玉米品种进行杂交可以获得超过优良亲本（综合种）产量10％左右的杂交种。
2
Both Numbers and chromosomal locations of resistant genes are different, which indicates that the diverse resistant genes can be recombined by intervarietal cross.
不同抗源之间抗病基因的数目和所涉及的染色体也不同，彼此可以杂交重组。
3
By means of intervarietal crossing and linear selection, the new rape variety "Youyan No. 1" of low erucic acid and "Youyan No. 2" of "Double Low"(low erucic acid and low glusosiolate) have been bred.