不同生态类型区玉米自交系杂种优势利用研究

对来自东北、黄淮海和利用西南地方种质(在河南选育)的各5份玉米自交系,按Griffing双列杂交方法Ⅳ设计,组成105个杂交组合.采用完全随机区组设计进行试验,分析了生育期、株高、穗位高、穗长、秃尖、穗粗、穗行数、行粒数、千粒重和单株产量10个性状的GCA、SCA、TCA以及各自交系的SCA方差进行估算和分析.结果表明:各自交系的GCA、SCA方差均达到极显著水平.Z684、Z141、Z442、昌7-2、246这5个自交系综合性状表现突出,是在黄淮海地区组配强优杂交组合的优良自交系。

Study on Utilization of Maize Inbred-lines' Heterosis in Different Ecological Areas

maize inbred-lines(5 from Northeast,5 from Huang huihai and 5 from Guizhou which were improved in Henan) used were crossed according to Griffing's method four, 105 single crosses were got complete random block design taken, analyzing ten character'GCA, SCA, TCA which are plant height, ear position, ear length, ear rows, and so on, and estimated each inbred-line's SCA. The result showed that all inbred-lines had remarkable variance of GCA, SCA. Comprehensive characters of inbred-line Z684, Z141, Z442, Chang7-2, 246 were outstanding and these five inbred-lines had been improved in Huan huihai area.