温热种质改良玉米自交系主要农艺性状配合力分析

对应用温带骨干自交系和西南地方种质选育的15份玉米自交系,按GriffingD4模型进行双列杂交,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。W 17,W 16,W 18,6-25,W 14这5个自交系综合性状表现突出,是组配强优杂交组合的优良自交系。

Analysis on Combining Ability of Main Agronomic Characters in Improved Maize Inbred Lines from Temperature Zone Maize Germplasm

15 maize inbred lines（from Northeast and Huang huai hai region） used were crossed according to Griffing s method four,105 single crosses were got completed 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 W17,W16,W18,6-25,W14 were outstanding and those were an excellent maize inbred lines on how to cross.