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半姊妹与全姊妹三轮次选择对玉米“沈综”群体改良效果的研究
引用本文:陈学军,原亚萍.半姊妹与全姊妹三轮次选择对玉米“沈综”群体改良效果的研究[J].吉林农业大学学报,1993,15(4):6-10.
作者姓名:陈学军  原亚萍
作者单位:吉林省种子总站 长春130062 (陈学军),吉林农业大学 长春130118(原亚萍)
摘    要:本文采用半姊妹与全姊妹轮回选择方法对玉米“沈综”群体实施了三轮次改良。结果表明,两种改良方案对“沈综”群体改良皆有显著效果,半姊妹方案取得产量每轮遗传增益为12.91%,明显大于全姊妹方案对农艺性状所取得的遗传进度也较大。三轮选择后,群体大多数农艺性状的遗传变异度没有下降。半姊妹方案实施过程中,更换测验种可扩大对被改良群体不同基因位点的选择压力。

关 键 词:玉米  姊妹系  轮回选择  杂交育种

Improvement Effects Of Three Cycles Of Half-sib And Full-sib Recurrent Selection In Syn. ShenYang Maize Population
Chen Xuejun.Improvement Effects Of Three Cycles Of Half-sib And Full-sib Recurrent Selection In Syn. ShenYang Maize Population[J].Journal of Jilin Agricultural University,1993,15(4):6-10.
Authors:Chen Xuejun
Institution:Chen Xuejun
Abstract:The experimental results show that the significant genetic gains of the grain yield and other traits have been gained by hall -sib and full-sib recurrent selection in the Syn. Shenyang maize population. The genetic gains per cycle for grain yield in population for half-sib and full -sib recurrent selection are 1 2. 91and 3. 22% , respectively. The resutls also shows that changing the tester in different cycles of half - sib selection could enhance the selection pressure on different loci in improving population and in favor of improving effect.
Keywords:Zea mays L    half - sib recurrent selection  full - sib selection  genetic gain
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