河南省玉米种质基础、杂优群划分和杂交优势利用模式研究

对 1 994～ 2 0 0 0年生产上主要种植的玉米杂交种的统计分析表明 ,河南省种植的玉米杂交种种质基础是以改良Reid群、Lancaster群、四平头群和旅大红骨群四大系统为主。其中改良Reid群利用水平逐年上升 ,Lancaster群明显下降。将河南省的玉米种质划分为五大杂优群8个亚群 :即改良Reid群、Lancaster群 (Mo1 7亚群 )、四平头群、旅大红骨群和其它群 (外杂选亚群、综合种选亚群、Suwan亚群和其它低纬度种质亚群 )。总结出 7种主体杂优利用模式 ,1 3种子模式。

Studies on Maize Germplasm Base,Division of Heterosis Groups and Utilizing Models of Heterosis in Henan

The statistical results on the main cultivated maize hybrid in Henan province in 1994～2000 indicated that the four groups,Improved Reid,Lancaster,Sipingtou and Ludahonggu,were dominant parts of maize germplasms in Henan province.The utilizing proportion of Improved Reid group increased annually and that of Lancaster group decreased significantly.The maize germplasms in Henan province were divided into five heterosis groups and eight subgroups,i.e.,Improved Reid,Lancaster(Mo17 subgroup),Sipingtou,Ludahonggu and others (foreign hybrids,subgroup from synthetic varieties,subgroup from Suwan,and other subgroup from low latitude region).Seven main models,thirteen sub-models of maize heterosis utilization were also proposed.