红麻杂交种幼苗生长对盐胁迫的响应  

Response of hybrid kenaf seedling to salt stress

作　　者：张加强[1] 潘凤英[1] 廖小芳[1] 周瑞阳[1] 杨健[1] 黄龙[1] 

机构地区：[1]广西大学农学院,南宁530004

出　　处：《华中农业大学学报》2011年第5期552-557,共6页Journal of Huazhong Agricultural University

基　　金：国家麻类产业技术体系建设专项资金(nycytx-19-E16);广西研究生教育创新计划(105931001010)

摘　　要：以红麻细胞质雄性不育系P3A、恢复系992及其杂交F1为材料,采用水培法研究盐胁迫对红麻幼苗生长效应以及红麻杂交种对盐胁迫是否存在杂种优势。结果表明:盐胁迫显著抑制红麻幼苗的生长,改变了干物质的分配,使根冠比增大;不同基因型红麻幼苗对盐胁迫的耐性存在显著差异;红麻杂交种的幼苗生长对盐胁迫的响应表现出较强的中亲优势和超高亲优势,F1相对亲本的杂种优势在一定范围内随着盐浓度的提高进一步增强。Responses of kenaf seedling to the salt stress were studied using water planting of cytoplasmic male sterility（CMS） line P3A,restorer line 992,and their F1 hybrids.The results showed that salt stress significantly inhibited the growth of kenaf seedlings.Salt stress caused changes in dry matter partitioning and increased the ratio of root to shoot.Responses to salt were different among different genotypes.The F1 hybrid showed positive midparent-/transgressive-heterosis.The heterosis of F1 increases under higher concentration of salt within certain range.

关 键 词：盐胁迫 杂种优势 红麻 超高亲优势 水培法 

分 类 号：S563.5[农业科学—作物学] S332.6