Pedigree method, backcross method and convergent cross selection are used widely in dwarf maize breeding.
矮生玉米自交系的选育方法主要有系谱法、回交法和聚合选择法。
The method can be conveniently applied to practical backcross breeding programs.
该方法可以很方便地应用于实际的回交育种。
The method using in vitro irradiation seems to be more effective than conventional irradiation, tissue culture or backcross for improving a few characters in a variety.
因此，对于品种个别性状的改造，离体辐照可能比其它方法更有效。
Alloplasmic male sterile line 034a was breeded by using method of distant hybridization and backcross.
通过萝卜远缘杂交创建不育源，再经过回交转育而选育出异源胞质不育系034a。
Alloplasmic male sterile line 034a was breeded by using method of distant hybridization and backcross.
通过萝卜远缘杂交创建不育源，再经过回交转育而选育出异源胞质不育系034a。
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