【摘要】 选用墨白1号、苏湾1号、双M9为基础材料,以自交系掖478为导入系制成热带、亚热带种质比例为25%～75%的群体,采用NCⅡ设计,分析包括3个基础材料在内的12个群体(系)与丹340、昌7-2、Mo 17、齐319及CML161、CI44、Tafa2组合的产量一般配合力与特殊配合力。结果表明,含50%～75%双M9种质群体、墨白1号、含75%墨白1号种质的群体和苏湾1号具有较高的一般配合力,而含25%～50%墨白1号种质、50%苏湾1号和25%双M9种质群体的一般配合力较低;在"热带×热带"模式下,不同热带种质含量群体均有较高的产量表现,但以热带种质含量50%～75%与CML161及CI44组合的配合力及产量表现最高;在"温带×热带"杂优模式下,不同比例热带种质群体与温带测验种杂交组合间杂种优势差异较大,总体上墨白1号群体及含25%其他热带种质的群体与丹340配合力较低;自交系CML161和CI44能较有效地区分不同的材料,可作为本地测验种加以应用。更多还原

【Abstract】 The present experiment used Tuxpeno,Suwan1,Double M9(DM9) and Ye 478 to obtain 9 maize populations with 25 %-75 % tropic and subtropical germplasm.NCⅡ design was adopted in this experiment to study the combining ability and heterotic of the 12 maize population combined with testers of Dan340,Chang7-2,Mo17,Qi319,CML161,CI44 and Tafa2.The results showed that the general combining ability(GCA) of Tuxpeno,Suwan1,the populations with 50 %-75 % DM9 and 75 % Tuxpeno germplasm proportion were higher than the others,whereas the GCA of the populations with 25 %-50 % Tuxpeno,50 % Suwan1 and 25 % DM9 germplasm proportion were lower.In the mode of tropic germplasm combining with tropic germplasm,different combinations with tropic germplasm all obtained higher yield and the highest yield were observed in the combinations with 50 %-75 % tropic germplasm combined with CML 161 and CI44.In the mode of tropic germplasm combining with temperate germplasm,the heterosis between combinations with different proportional tropic germplasm combined with temperate testers showed significant differences.The combining ability of Tuxpeno and populations with 25 % other tropic germplasm combined with Dan340 was lower.The inbred lines CML161 and CI44 could effectively identify different materials and were good testers for local maize germplasm.更多还原