摘要
利用主基因 -多基因遗传模型 ,以玉米杂交组合农大 3138的P1,P2 ,F1和F2∶3 家系为材料 ,联合分析了玉米产量性状的遗传效应。结果表明 :穗长、穗粗、穗重和单株粒重是由多基因模型控制 ;行粒数和千粒重检测到 1对完全显性主基因 ,穗行数和秃顶长存在 2对主效基因 ,而且穗行数的 2对主效基因之间存在互作效应。同时对不同方法计算出来的遗传率作了比较 ,认为存在主效基因的性状遗传率偏低的原因是由于基因的显性作用所致。
Genetic effects of maize yield component traits were studied by using four populations P 1,P 2,F 1 and F 2∶3 based on major gene and polygene mixed model.The results showed that ear length,ear diameter,ear weight and grain yield/plant were controlled by polygenes.Some major genes controlling kernel number,kernel weight,row number and bare tip length were found.Epistatic interaction between two major genes controlling row number was also detected.It was supposed that characters controlled by major gene and polygene model having lower heritabilities was due to dominant effect.Breeding strategies for yield component traits were discussed.
出处
《华北农学报》
CSCD
北大核心
2001年第3期1-5,共5页
Acta Agriculturae Boreali-Sinica
基金
国家自然科学基金资助项目 ( 3 9893 3 5 0 )
关键词
玉米
产量性状
主基因-多基因模型
遗传参数
Maize yield component traits
Major gene and polygene model
Genetic parameter
