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采用NCⅡ设计,以6个代表我国主要玉米种质的自交系为测验种与来自CIMMYT并经过初步改良的4个群体杂交,通过配合力和杂种优势分析以明确其进一步改良与利用的方向。结果表明:①可以将Pob45群体导入Reid种质,Pob45改良系×Lancaster种质可能为一个潜在的杂种优势组合模式;②可以将Pob46群体导入Lancaster种质,Pob46改良系×旅大红骨种质可能构成一个潜在的杂种优势组合模式;③可以将Pob69群体导入PA种质,Pob69×Lancaster种质可能构成一个潜在的杂种优势组合模式;④在青贮玉米育种可将Pob70群体导入PB种质,在普通玉米育种中,可将Pob70群体导入旅大红骨种质,Pob70×PA种质可能构成一个潜在的杂种优势组合模式。
Using NC Ⅱ design, six inbred lines that represent the main maize germplasm in China were used as test varieties to cross with the four improved primary populations from CIMMYT. Through the analysis of combining ability and heterosis, the direction of further improvement and utilization was clarified. The results showed that: (1) Pob45 population could be introduced into Reid germplasm, and Pob45 improved line × Lancaster germplasm could be a potential heterosis combining pattern; ②Pob46 population could be introduced into Lancaster germplasm, Pob46 improved line (3) The Pob69 population can be introduced into PA germplasm, and Pob69 × Lancaster germplasm may constitute a potential heterosis combination pattern. (4) Pob70 population can be introduced into PB germplasm in silage maize breeding, In maize breeding, Pob70 population can be introduced into Ludaohongbiao germplasm. Pob70 × PA germplasm may constitute a potential heterosis combination pattern.