玉米自交系空间诱变后代主要性状的遗传相关及通径分析  

Correlation and Path Analysis on Main Agronomic Traits of Progeny from Space Mutation Maize Inbred Lines

作　　者：张采波[1] 吴章东[1] 徐魏[1] 荣廷昭[1] 曹墨菊[1] 

机构地区：[1]四川农业大学玉米研究所,教育部作物基因资源与遗传改良重点实验室,农业部西南玉米生物学及遗传育种重点实验室,四川成都611130

出　　处：《核农学报》2013年第8期1061-1068,共8页Journal of Nuclear Agricultural Sciences

基　　金："十二五"863计划重点课题(2011AA10A103;2012AA101202);"十一五"国家科技支撑计划项目(2008BAD97B03)

摘　　要：为了更有效的发掘和利用玉米空间诱变后代变异资源,本研究分别以来自3份不同玉米自交系空间诱变后代诱变系所配杂交组合为供试材料,在不同环境条件下进行产量及其相关性状的重复鉴定。相关和通径分析结果表明,对于不同玉米材料的诱变后代应采用不同的选择策略,对08-641诱变材料应首先考虑百粒重性状,同时兼顾穗行数和行粒数性状;对于RP125诱变材料应首先考虑行粒数性状,同时兼顾百粒重和穗行数性状;对于18-599诱变材料,应首先考虑百粒重性状,分地区的兼顾株高、穗粗、穗位高和出籽率等性状,鉴于不同诱变材料所配杂交组合的产量影响因素不同,且受环境因素影响较大。因此对玉米空间诱变后代性状之间的相关性进行分析,将有助于玉米空间诱变后代材料在育种上的选择利用。In order to discover and utilize the valuable resources from spaceflight mutagenesis maize offspring effectively,cross combinations derived from the offspring of three different maize inbred lines induced by space flight were made to investigate the yield and related agronomic traits under different environmental conditions.Correlation and path analysis indicated that the factors affecting the yield of combinations varied with different mutagenic materials and environmental effects with larger effect coming from environment.Therefore,different selection strategies should be chosen for different induced maize.For the 08-641 mutagenic material,the 100-kernel weight should be first considered to select while taking into account the number of rows per ear and kernels per row.For the RP125 mutagenic material,the kernels per row should be first selected,and then to select the 100-kernels weight and the number of rows per ear traits.For 18-599 mutagenic material,the 100-seed weight should be first selected,then the plant height,ear diameter,ear height,kernels rate and other traits should be selected in different environments.Combined with field resistance,plant types and other traits,excellent maize inbred lines with high yield potential from space mutagenesis offspring were selected.Thus study has obtained some breeding materials useful for further breeding purpose,and provide a reference method as how to use the spaceflight induced materials for for maize breeding.

关 键 词：玉米 空间诱变 单株产量 相关 通径分析 

分 类 号：S513[农业科学—作物学]