| 陈志伟， 徐红卫，王金社，黄亦辰，杜志钊，刘成洪，陆瑞菊，黄剑华.低氮胁迫下大麦苗期株高和根长的遗传特性[J].麦类作物学报,2015,35(5):609 |
| 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 |
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| DOI：10.7606/j.issn.1009-1041.2015.05.05 |
| 中文关键词: 大麦 低氮胁迫 株高 根长 遗传特性 |
| 英文关键词:Barley (Hordeum vulgare L.) Low-nitrogen stress Plant height Root length Inheritance character |
| 基金项目: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） |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 cultivar 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 discussed. |
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