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利用S1家系密植鉴定改良方法对中综6群、瑞德群、黄改群、先玉335群进行1~2轮改良,获得9份群体。以9份群体为父本,自交系丹598、郑58、吉853为测验种,配制27份杂交组合,进行产量配合力比较试验,从单株产量、穗部性状和配合力角度分析群体改良的效果。结果表明,改良群体单株平均产量均有增加,穗部性状向有利于高产的方向发展。中综6群经过两轮改良后,一般配合力效应从C0的-4.44增加到C2的3.84;瑞德群经过一轮改良后一般配合力效应从C0的-1.44增加到C1的2.9;黄改群从C0的-2.83增加到C1的1.93,一般配合力效应均达到极显著水平。特殊配合力排前两位的杂交组合为郑58×黄改群、丹598×瑞德群。
The S1 family close planting identification method was used to improve Zhongzheng 6, Reid, Huanggai Qun and Xianxu 335 for 1 ~ 2 rounds to obtain 9 populations. Nine hybrids were used as male parents, inbred lines Dan598, Zheng58 and Ji853 were tested, and 27 hybrid combinations were prepared to compare the yield combining ability. The population was analyzed from the perspective of yield, ear traits and combining ability Improved effect. The results showed that the average yield per plant of the improved population increased, and the panicle traits evolved in favor of high yield. After two rounds of improvement, the general combining ability effect increased from -4.44 C0 to C2 3.84; after one round of improvement, the general combining ability effect increased from -1.44 C0 to C1 2.9; -2.83 of C0 increased to 1.93 of C1, and the general combining ability effect reached extremely significant level. The first two combinations of special combining ability were Zheng 58 × yellow group, Dan 598 × Reid group.