论文部分内容阅读
1980 ～1997 年山东省玉米主要种质中,BSSS 系统系呈明显上升的趋势,兰卡斯特系统系呈逐渐下降趋势,塘4 平头和旅大红骨子系统系呈波浪式变化。90 年代,BSSS 系统系占43-3 % ,塘4 平头系统系占30-0 % ,兰卡斯特系统系占10-0 % ,旅大红骨子系统系占6-7 % ,四大系统系共占90-0 % 。山东省玉米种质划分为五大杂种优势群,即兰卡斯特( 主要含Oh 43 亚群和C103 亚群) 、BSSS( 主要含8112 亚群和XL80 亚群) 、塘4 平头、旅大红骨子和其它种质杂种优势群,总结探索出10 种主体杂交优势利用模式和19 种子模式,其中,利用最多的子模式有3 种:8112 亚群×塘4 平头群、XL80 亚群×塘4 平头群和C103 亚群×塘4 平头群。
From 1980 to 1997, among the main maize germplasms in Shandong Province, the BSSS system showed a clear upward trend. The Lancaster system showed a gradual downward trend, while that of the Tong4 flat head and the Ludong red bone system fluctuated in a wavy manner. In the 1990s, BSSS system accounted for 43-3%, Tong 4 flat system accounted for 30-0%, Lancaster system accounted for 10-0%, Luda Red bone system accounted for 6-7%, the four systems A total of 90-0%. Maize germplasm in Shandong Province was divided into five major heterosis groups, namely Lancaster (mainly containing Oh 43 subgroup and C103 subgroup), BSSS (mainly containing 8112 subgroup and XL80 subgroup), Tong 4 flat head, And other germplasm heterosis groups, 10 heterosis utilization patterns and 19 seed patterns were summarized and explored. Among them, the most utilized subtypes were 3 types: 8112 subgroup × pond 4 flat head group, XL80 subgroup × pond 4 flat head Group and C103 sub-group × Tong 4 flat head group.