改良昌7-2玉米自交系配合力研究

Study on the Improvement of Maize Inbred Line Chang7-2

利用13个玉米自交系,按NCⅡ不完全双列杂交设计配制成42个杂交组合,随机区组排列,田间品比鉴定和室内鉴定相结合。结果表明,西农672产量配合力高于昌7-2和7117,穗长、结实长、穗行数和行粒数性状的配合力高于昌7-2、PH6wc和7117;西农672出籽率性状配合力低于昌7-2,株高配合力低于PH6wc,高于昌7-2,也高于7117;西农672穗位高配合力高于PH6wc和7117,低于昌7-2。西农672出籽率配合力与PH6wc相近;叶面积系数、穗长、穗行数、结实长、行粒数比昌7-2高,百粒重、小区产量配合力比PH6wc略低。用PH6wc来改良昌7-2得到的西农672,综合性状改良效果较为显著。用PH6wc改良昌7-2育成西农672与用昌7-2×武117育成的7117和昌7-2相比较,其产量配合力、产量性状、农艺性状配合力等均有显著提升。

In complete Diallel Croreid Design（NC ]] croReid design）, forty-two croreides were made with thir- teen inbred lines, plot arrange randomly, field determination integrate with laboratory determination. The result showed that, the yield C. A. of Xinong672 was higher than Chang7-2 and 7117; the C.A. of ear length, ear length for grain, rows per ear, grains per row of Xinong672 was higher than that of Chang7-2, PH6wc and 7117; the C.A. of grains percent of Xinong672 was lower than that of Chang7-2; the C.A. of plant height by Xinong672 was higher than that of Chang7-2 and 7117, and lower than that of PH6wc; the C.A. of ear height by Xinong672 was higher than that of PH6wc and 7117, and lower than Chang7-2. The C.A. of grains percent by Xinong672 was fairly with PH6wc; the C.A. of LAI, ear length, ear height, ear length for grain, rows per ear, grains per row of Xinong672 was higher than that of Chang7-2; The C.A. of LAI, 100 grain weight, yield of Xinong672 was lower than that of PH6wc slightly. The Xinong672 was bred from using PH6wc improvement Chang7-2, and it collected the advantage of PH6wc and Chang7-2, the synthesis improvement effect of Xinong672 was better than 7117 which from using Wu117 improvement Chang7-2 obviously. The yield C.A., yield characteristic and agronomy characteristic C.A. of Xinong672 which from using PH6wc improvement ChangT-2 had been more promoted than 7117 which from using Wu117 improvement Chang？-2 obviously.