早熟玉米自交系配合力分析及应用评价

【目的】早熟玉米自交系不同性状配合力测定和分析。【方法】按Pl×P2不完全双列杂交设计,用NCⅡ分析方法对4个新育成早熟玉米自交系和6个早熟核心自交系11个性状的一般配合力和24个组合的特殊配合力进行分析评价研究。【结果】武314、新自349、新自3113-1、ZPA82/9这4个自交系单株产量配合力较高,新自3112、新自3119、新自4202需要改良后利用,新自3113-1可直接利用但要控制株高和穗位高,ZPA82/9、武314、新自349秃尖的负向配合力效应值大,可以用来改良秃尖,早314L的株高和穗位高配合力负向效应值大。新自3113-1×OS87-24、新自3112×JL02、新自3119×早314L、新自3112×武314、新自4202×新自349、新自4202×ZPA82/9这6个组合的特殊配合力单株产量较高。【结论】亲本的一般配合力效应对F1代杂交种的11个性状均存在显著或极显著的影响,11个性状都存在极显著的特殊配合力效应。

Analysis of Combining Ability and Applied Evaluation of Early Maturing Maize Inbred Lines

Objective and Method]The early maturing maize inbred lines have been tested in this paper with the designing Zign of P1×P2 incomplete diallel crossing of NCⅡ method to study combining ability of 11 traits.Ana1ysis of the general combining ability showed that 11 traits was significantly difference.The special combining ability of 11 traits had significant difference.Result]The result indicated that the lines of Wu314,Xinzi349,Xinzi3113-1 and ZPA82/9 had higher general combining ability (GCA) of yield per plant., the lines of Xinzi3112,Xinzi3119 and Xinzi4202 must be modified before application,the line of Xinzi3113-1 can be directly used but the traits of plant height and ear seat of it must be controlled by plant height and ear height.There were great effect value of negative combining ability of bare tip of ZPA82/9,Wu314 and Xinzi349 .The line of Zao314L had great negative effect value of combining ability and plant height.Conclusion]The combinations of Xinzi3113-1×OS87-24,Xinzi3112×L02,Xinzi3119×Zao314L,Xinzi3112×Wu314,Xinzi4202×Xinzi349 and Xinzi4202×ZPA82/9 had special combining ability(SCA) of high yield per plant.