低氮胁迫下大麦苗期株高和根长的遗传特性  

Genetic Characters of Plant Height and Root Length of Barley at Seedling Stage under Low-nitrogen Stress

作　　者：陈志伟[1,2] 徐红卫[1,2] 王金社[3] 黄亦辰[1,2,4] 杜志钊[1,2] 刘成洪[1,2] 陆瑞菊[1,2] 黄剑华[1,2] 

机构地区：[1]上海市农科院生物技术研究所,上海201106 [2]上海市农业遗传育种重点实验室,上海201106 [3]河南省农科院经作所,河南郑州450002 [4]上海海洋大学水产与生命学院,上海201306

出　　处：《麦类作物学报》2015年第5期609-613,共5页Journal of Triticeae Crops

基　　金：上海市科委基础研究重点项目(12JC1407800);上海市农业科学院发展基金项目[农科发2013(16)];上海市市级农口系统青年人才成长计划项目[沪农青字(2014)第1-21号];国家大麦青稞产业技术体系项目(CARS-05)

摘　　要：为指导大麦耐低氮育种,以耐低氮大麦材料BI-04与低氮敏感材料BI-45衍生的F3群体为供试材料,利用主基因+多基因混合遗传模型,对低氮胁迫下大麦苗期的株高和根长性状进行了遗传分析。结果表明,低氮胁迫下,F3群体株高表现为B-4遗传模型,即2对主基因的等加性遗传模型,遗传率为30.99%,说明选育株高性状可以在相对较早的世代进行。F3群体根长则表现为A-0遗传模型,即无主基因遗传模型,说明选育根长性状需要在较晚世代进行。To provide guidances for low-N tolerance of barley breeding, a F3 population consisting of 198 lines,which was derived from the cross of low-N tolerance cultivar BI-04 and low-N sensitive eulti- var BI-45,was used to estimate the inheritance of plant height and root length of barley at seedling stage under low-nitrogen stress by using the major gene plus polygene mixed inheritance model. The results showed that the plant height of barely seedlings was genetically controlled by the genetic model B-4 （two major genes with equal additive effects） ,the heritability value of major genes for plant height was 30. 99%, while the root length was genetically controlled by the genetic model A-0 （no major gene）. So it was indicated that the plant height could be selected in early generations. Finally, the strategy of genetic analysis for breeding new barley varieties with low-nitrogen tolerance was dis- cussed.

关 键 词：大麦 低氮胁迫 株高 根长 遗传特性 

分 类 号：S512.3[农业科学—作物学] S330