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[目的]为红麻杂交一代F1应用和铅、镉耐性植物的筛选提供理论依据。[方法]以红麻细胞质雄性不育系P3A、恢复系992及杂交种F1为材料,采用盆栽试验法,设定不同浓度Cd2+、Pb2+处理,研究红麻的生长效应及其对不同浓度镉、铅胁迫的反应。[结果]重金属胁迫显著抑制了红麻的生长,影响红麻的生物量(茎叶干重、根干重、根冠比)及干物质的分配;不同品种红麻对重金属胁迫的耐性存在显著差异;红麻杂交种的生长对重金属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重金属浓度的提高进一步增强。[结论]在一定阈值内,红麻杂交种在重金属胁迫下的生长表现出比亲本较强的耐性,红麻杂交种在耐重金属方面具有杂种优势。
[Objective] The research aimed to provide theoretical basis for F1 application of kenaf crossbred and selection of lead and cadmium tolerant plants. [Method] With the cytoplasm male sterile line P3A, restorer line 992 and hybrid F1 of kenaf as materials, pot experiments were conducted to study the effects of different concentrations of Cd2 + and Pb2 + on the growth of kenaf, Lead stress response. [Result] The heavy metal stress significantly inhibited the growth of kenaf and influenced the biomass of kenaf (stem and leaf dry weight, root dry weight, ratio of root to shoot) and dry matter distribution. The tolerance of kenaf under different heavy metal stress was significant The heterosis of kenaf hybrids was stronger in the response of heavy metal stress to heavy metal stress. The heterosis of F1 relative to parent increased with the increase of heavy metal concentration in a certain range. [Conclusion] Within a certain threshold, kenaf hybrids showed stronger tolerance to heavy metal stress than their parents, and kenaf hybrids had heterosis in heavy metal tolerance.