耐低钾玉米自交系主要根系性状的遗传分析  

Inheritance of Main Root Traits of Tolerance to Low Potassium in Maize Inbred Lines

作　　者：刘宇[1] 于海秋[1] 李兴涛[1] 依兵[1] 蒋春姬[1] 王晓磊[1] 曹敏建[1] 

机构地区：[1]沈阳农业大学农学院,沈阳110866

出　　处：《沈阳农业大学学报》2010年第2期199-202,共4页Journal of Shenyang Agricultural University

基　　金：辽宁省教育厅创新团队项目(2007T114)

摘　　要：以耐低钾玉米自交系90-21-3和低钾敏感玉米自交系D937及其F1、F2、BC1、BC2群体为试验材料,采用天然低钾大田种植,对玉米耐低钾的主要根系性状进行了遗传分析。结果表明:总根长和根表面积的遗传率较高,其狭义遗传力分别为63.05%和44.47%,两性状均为多基因控制的数量性状,存在主效基因作用。根体积、根平均直径、根干重和根含钾量的遗传率均较低,受环境影响较大。Two contrasting maize inbred lines, 90-21-3（tolerant to low potassium） vs. D937 （sensitive to low potassium）, and their F1, F2, BC1, BC2 generations were analyzed for their main root traits. The results showed that total root length and root surface area had high heritability, with narrow heritability of 63.05% and 44.47%, respectively. Total root length and root surface area were quantitative trait controlled by polygene with major genes expected. Root volum, root average diameter, root dry weight and K contents in root were relatively low, meaning that these traits were obviously affected by environment.

关 键 词：玉米 耐低钾 根系性状 遗传力 

分 类 号：S513[农业科学—作物学]