为系统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。本研究采用NC-Ⅱ遗传交配设计,以铁7922及其改良系为母本,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一年三点田间鉴定。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的改良效果差、利用价值低。S273、S909、927、T32是良好的测验系。铁7922及其改良系×苏湾系这一杂交模式的优势明显,可进一步应用瑞德×苏湾这一杂种优势模式的育种价值。
英文摘要:
The object of this study was to figure out that the improvement effects contributed by different donor parents on maize inbred line Tie7922 and the utilization of improved lines. In this paper, maize inbred line Tie7922 and its 9 improved lines were selected as female parents, 10 elite Suwan germplasm inbred lines were used as testers, NCⅡ incomplete genetic mating was designed to analyze the effects of combining ability for main agronomic traits. Partially Balanced Lattice Design was employed in the field experiment which was done in three typical places. The results showed that the improved lines T123,1164 and QR29 had higher utilization value, 440-4,1061 and QR25 got some potential utilization, the rest of improved lines such as A30,A26 and 21170 were the poorest in this paper. The elite testers selected were S273, S909, 927, T32. Obviously heterosis for the hybrid model that Tie 7922 improved lines×Suwan lines could indicated that we should take full advantage of heterosis pattern Reid×Suwan in the process of future breeding.
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