摘要：
One hundred and sixty crosses between 20 tropical inbred lines and 8 temperate inbred lines of maize were used to study their growth periods,yield,plant morphological traits and ear characters in mid-region of Jilin province.The results indicated that the progenies of tropical lines with early-maturing temperate lines He 344 and four-287 etc.reduced in photoperiod sensitivity.The hybrids between tropical lines and temperate lines had a certain yield-increasing potential.Relatively,the tropical'lines presented the strongest heterosis with line Lüdahonggu,and the weakest heterosis with line Lancaster in grain yield.In ear and plant characters,the tropical-temperate hybrids had great difference with CK,and the effect of different temperate lines in crosses was very different.For example,line 9046 increased the ear length,line Mo17 increased the kernel number per row,and line four-287 decreased the barren tip and increased the kernel weight.%在吉林省中部地区,分析了20个玉米热带系与8个温带系间的160个温热组合的生育期、产量、植株形态特征和穗部性状.结果表明,玉米热带系与合344、四-287等早熟温带系组合的后代,其光敏感性降低明显,尤其是熟期比较早的自交系,反之作用较小;在产量方面,温热组合有一定的增产潜力,相对来说旅大红骨同这批热带系的杂交优势最强,Lancaster最弱;在穗部性状、植株形态性状方面,温热组合的穗部性状与对照差别明显,不同温带系在组合中的作用有较大差异,9046能延长稳长,吉V022能增加穗行数,Mo17能增加行粒数,四-287能减小秃尖、增加百粒质量.
