中国农业大学学报2011，Vol.16Issue(5)：6-12,7.
红麻杂交种的根系生长对盐胁迫的抗性优势表现
Superiority of resistance in the root growth of kenaf hybrid under salt stress
摘要
Abstract
The heterosis of salt tolerance for kenaf hybrid was studied through hydroponic methods, with cytoplasmic male sterility （CMS） kenaf P3A, maintainer line P3B and hybrid as experimental materials. The objective of this study was to investigate the heterosis of kenaf root growth at seedling stage under salt stress, thus provide a scientific basis for kenaf heterosis utilization and kenaf hybrid breeding for salt-tolerance. The results showed that salt stress significantly inhibited the root growth of kenaf. They were different among different genotypes. The heterosis existed in the root length, root surface area, root volume and root tips under salt stress, and the hybrid with advantages over the parents. The F~ hybrid of kenaf showed both strong midparent and overparent heterosis. The finding suggested that the F1 hybrid possessed higher salt tolerance than that of the parents within certain range. The root architecture of kenaf were altered under salt stress, and more coarse root （root diameter〉2.25 mm were formed. This suggested that salt stress promoted the superiority of resistance. Under salt stress condition, kenaf hybrid develop more coarse root （root diameter〉2.25 mm） than that of its parents,which enable them to resist moderate salt better.关键词
红麻/盐胁迫/杂交种/根系Key words
kenaf/salt stress/hybrid/root分类
农业科技引用本文复制引用
张加强,潘凤英,窦俊焕,陈鹏,周琼,周瑞阳..红麻杂交种的根系生长对盐胁迫的抗性优势表现[J].中国农业大学学报,2011,16(5):6-12,7.基金项目
国家麻类产业技术体系建设专项（nycytx-19-E16) （）
广西研究生教育创新计划项目（105931001010) （）
