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采用NC-Ⅱ遗传交配设计,以铁7922及其9个改良系为母本,10个苏湾种质系为测验种,组配100个杂交组合,应用部分平衡格子方进行1年3点田间鉴定,评价优良玉米自交系铁7922的改良效果,探索改良新系的利用潜力。结果表明,改良新系T123、1164、QR29的利用价值大;440-4、1061、QR25具有一定的利用潜力;A26、A30、21170改良效果差、利用价值低;S273、S909、927、T32是良好的测验系。铁7922及其改良系×苏湾系杂交模式优势明显,可进一步应用瑞德×苏湾杂种优势模式。
Using NC-Ⅱ genetic mating design, we took iron 7922 and its 9 improved lines as female parent and 10 Suwan germplasm as test species with 100 hybrid combinations, using partial balanced grid for 1 year and 3 field Identification and evaluation of the improved maize inbred line iron 7922 to explore the potential to improve the utilization of new lines. The results showed that the improved value of the new lines T123, 1164 and QR29 was great; 440-4,1061 and QR25 had some potentials; A26, A30 and 21170 had poor improving effect and low utilization value; S273, S909, 927 and T32 were Good test system. Tie 7922 and its improved line × Suwan line hybrid model has obvious advantages, can be further applied Reid × Su Wan heterosis patterns.