含不同比例热带玉米种质杂交组合产量比较研究初报

利用典型的热带玉米种质群体苏湾1号、墨白1号和自交系双M9分别与典型的温带玉米种质自交系掖478杂交,组配成含有苏湾1号、墨白1号、双M9 3个热带种质比例分别为25%、50%、75%的9个杂交组合;将这9个杂交组合和苏湾1号、墨白1号2个群体进行种植观察鉴定,并对其穗长、穗粗、秃尖长、穗行数、行粒数、千粒重及产量进行分析。结果表明,杂交种温热种质含量各为50%时的籽粒产量最高,穗长、穗粗、行粒数也最大,而果穗秃尖长度差异不显著。因此,广西玉米采用＂热带种质×温带种质＂杂交模式比较容易获得高产。

Elementary report on the yield comparison for maize cross combination containing different proportions of tropical germplasm

In the present study,two tropical maize germplasm populations,viz.,Suwan 1 and Tuxpeno1 and one inbred line Shuang M9 were used to cross with temperate germplasm inbred line Ye 478.Total 9 cross combinations were bred which contained the tropical germplasm of 25% Suwan 1,50% Tuxpeno 1 and 75% Shuang M9.The ear length,ear diameter,length of bald tip,rows per ear,grains per row,1000-grain weight and yield of the 9 crosses and populations of Suwan 1 and Tuxpeno 1 were analyzed.The results showed that the cross...