河北省玉米种质基础及杂交优势利用模式的分析

Analysis of Maize Germplasm Base and Crossing Models in Hebei Province

通过对 1980～ 1998年主要种植玉米杂交种有关数据的统计分析表明 ,80年代以来 ,河北省种植玉米杂交种种质基础是以塘四平头群、兰卡斯特群、改良Reid群、旅大红骨群四大系统为主 ,并且近几年有增加之趋势。四大系统中 ,塘四平头群变化不大 ,兰卡斯特群利用水平明显降低 ,改良Reid群利用水平明显增加。杂交优势利用模式主要是 :改良Reid群×塘四平头群 。

According to analysis on the materials of main hybrids utilized in corn commercial production,Improved Reid、Ludahonggu、Lancaster and Tang sipingtou are the main germplasms of the main hybrids in Hebei province.And the proportion of these four germplasms trends still increasing in recent years.The proportion of Tangsipingtou didn't changed so obviously,the Lancaster trend decreased while the Improved Reid trend increased during 1980～1998.Two main crossing models were widely used.They were Improvent Reid group×Tangsipingtou group,Tangsipingtou group×other germplasms group.