CAJ | 학술논문

以玉米自交系综3和衡白522的F2∶3家系为材料，通过一年两点的田间试验，研究了6个籽粒产量相关性状的遗传特点。结果表明，所调查的6个性状中，广义遗传力在两点最高的为穗行数和穗粗，其次为行粒数、穗粒重、穗重、穗长。 F1代中亲优势和超亲优势的强弱依次为穗粒重、穗重、行粒数、穗长、穗行数和穗粗。F2∶3家系表现出明显的自交衰退现象。穗粒重的变异系数最高，其次分别为穗重、行粒数、穗长、穗行数和穗粗。穗粒重与穗长、穗粗、穗行数和行粒数均存在极显著正相关关系；行粒数对穗粒重的促进作用更明显。利用籽粒各性状之间的相关关系，可以为正确估算靶基因表型值、精细定位和克隆基因提供参考。
이옥미자교계종3화형백522적F2∶3가계위재료，통과일년량점적전간시험，연구료6개자립산량상관성상적유전특점。결과표명，소조사적6개성상중，엄의유전력재량점최고적위수행수화수조，기차위행립수、수립중、수중、수장。 F1대중친우세화초친우세적강약의차위수립중、수중、행립수、수장、수행수화수조。F2∶3가계표현출명현적자교쇠퇴현상。수립중적변이계수최고，기차분별위수중、행립수、수장、수행수화수조。수립중여수장、수조、수행수화행립수균존재겁현저정상관관계；행립수대수립중적촉진작용경명현。이용자립각성상지간적상관관계，가이위정학고산파기인표형치、정세정위화극륭기인제공삼고。
A population with 237 F2 ∶ 3 families from the crossing of Zong 3 ×HB 522 was phenotypically e-valuated at two locations to assay the genetic characteristics of six grain yield-related traits of maize ( Zea mays L. ) . Results showed that the kernel row number and the ear diameter had higher broad-sense heritability ( H2b ) , followed by kernels per row,kernel weight per ear,ear weight and ear length. The descending order of mid-parent heterosis of six traits and the over-parent heterosis in F1 generation was the kernel weight per ear,ear weight,ker-nels per row,ear length,row number and ear diameter. Obvious depression of inbreeding were observed in F2 ∶ 3 families. The coefficient of variation ( CV) of kernel weight per ear was the highest,CV of the other five traits was as follows:ear weight,kernels per row,ear length,row number and kernel weight per ear. The kernel weight per ear was significantly correlated with the ear length,ear diameter,row number,kernels per row. Kernels per row were more effective in promoting kernel weight per ear. Results provided a method for estimating phenotypic val-ues of target genes by using the correlation among six grain yield related traits of maize,thus helped to conduct fine mapping of related genes and gene cloning in maize.