8个掖478玉米近缘系主要农艺性状的配合力及遗传分析

选用丹340、郑22、868作父本,8个掖478自交系近缘系作母本,采用NCⅡ设计组配24个杂交组合,对24个F1的9个主要农艺性状进行了一般配合力、特殊配合力及遗传参数分析。结果表明,24个组合9个性状的F检验均达显著或极显著水平。3个父本自交系9个性状的一般配合力存在极显著差异。8个掖478母本自交系各性状一般配合力方差除株高、穗位极显著外,其余7个性状均未达显著水平。株高、穗位、单株产量、穗行数、行粒数、百粒重和轴粗表现主要受加性基因效应影响,穗长、茎粗受加性、非加性基因效应共同影响。

Combining Ability and Genetic Analysis for Main Agronomical Traits of 8 Maize Ye478 Related Inbred Lines

In the present study,24 hybrid crosses were made from three paternal inbred lines(Dan340,Zheng 22 and 868) and eight maternal inbred lines(all relatives of Ye478) by NCⅡ design.Nine main agronomic traits of the 24 F1 hybrids were selected to analyze the general combining ability(GCA),specific combining ability(SCA) and genetic parameters.The F test showed that the difference of all the nine agronomic traits was significant or highly significant.There was significant difference between the GCA estimates of nine traits in the 3 paternal inbred lines,but only two traits(plant height and ear height) presented the significant difference of GCA estimates in the 8 maternal inbred lines,and other traits were not significant.Plant height,ear height,weight/plant,rows/ear,kernels/row,100-kernel weight and ear axis diameter were mainly controled by additive gene effect,while ear length and stem diameter were jointly affected by additive and non-additive gene effect.