摘要： 为了研究内蒙古的玉米育种材料及其在杂种优势利用中的规律,用个标准测验种(B73、Mo17、丹340、黄早4和掖478)和内蒙古主推品种的40个自交系为供试材料,按照不完全双列杂交NCⅡ设计,得到200个杂交组合,通过种植鉴定,对F1产量及产量配合力进行分析,并对其遗传关系进行了初步的探讨.结果表明:内蒙古玉米生产中应用的自交系分为国内群(Dom)、A群(Reid群)、B群(非Reid群)三大群,且M3401、巴816、MzY、K12、M9271等11个自交系具有较高的GCA效应,是较好的育种材料;主要杂优模式有Lan×塘四平头、Reid×塘四平头、Reid×Lan等三种模式;在200个测交组合中,M3401×黄早4、M9271×黄早4、K12×Mo17、昌7-2×掖478等7个组合的SCA值较大、产量高,在育种中可获得优良品种或组合.

关键词: 玉米, 自交系, 配合力, 遗传关系

Abstract: 200 hybrid corn combinations had been gained by the design of uncompleted diallel crossing NC II,aecording to 5 standard testing varieties(B73,M017,Dan340,Huangza04 and Ye478),which represented main hybrid dominant groups in the north of China,and 40 inbred lines of main corn varieties in Inner Mongolia.Based on plan· ted verifications,the yield combining abilit and yields of F1 had been analyzed,and the genetic relationship had been discussed in this study,either.Experiments show that internal population(DOM),A population(Reid)and population(non-Reid)are the main inbred lines in the Inner Mongolia；the higher GCA effect exist in M3401,Ba816,MZY, K12,and M9271,etc,11 inbred lines,which are better breeding materials.Lan Langpingsitou,M9271 Lanpingsitou and Reid Lan are the main modes of hetemsis.In the experiments to test heterosis of these 200 combinations.it is more possible to gain fine varieties or combinations from M3401×Huangza04,K12×M017,etc seven combinations,the SCA values and yields are higher.

Key words: Maize, Inbred lines, Combining ability, Genetic relationship

中图分类号: 

• S13.03