【摘要】 本研究以H2 1×Mo17的F2 :3 群体 (12 0个家系 )为作图材料 ,利用SSR和AFLP标记对玉米资源H2 1的亚洲玉米螟抗性进行了数量性状位点 (QTL)分析。结果表明 ,基于叶片侵食度性状 ,检测到 3个QTL ,分别位于染色体 1、5、8上 ;基于茎秆虫孔数性状 ,检测到 3个QTL ,分别位于染色体 4和 10 (2个 )上 ;基于茎秆隧道长度性状 ,检测到 2个QTL ,位于染色体 4和 8上 ;以隧道长度 /虫孔数为鉴定性状 ,检测到 1个QTL ,位于染色体 4上。这些QTL所能解释的表型变异在 7 7%～5 1 8%之间。超显性是QTL作用的主要方式。更多还原

【Abstract】 Genetics analysis for the resistance to the pest is the base of improving the resistant germplasm and enhancing the efficiency of breeding. QTL analysis on the resistance to Asia corn borer (Ostrinia. furnacalis, ACB) were carried out in this study, using AFLP and SSR markers and an population including 120 F 2:3 families derived from the cross of H21×Mo17. Three QTL were identified for leaf feeding damage on chromosome 1, 5 and 8. Three QTL were identified for number of holes per stalk on chromosome 4 and 10 (two QTL). Two QTL were identified for stalk tunnelling length on chromosome 4 and 8. One QTL was identified for tunnelling length per hole on chromosome 4. These QTL explained 7 7%-51 8% of the phenotypic variance. Overdominance was the major mode of gene action in resistance to Asian Corn Borer in maize.更多还原