霍山石斛F1代生长、有效成分和生理特性的研究

目的:比较研究霍山石斛的F₁代与其亲本的生长量、有效成分和生理特性等差别,探讨霍山石斛杂交利用的可能性,筛选保持较高有效成分且产量高的新资源。方法:测定霍山石斛F₁代与其亲本的生长量和有效成分,光合特性、内源激素含量和同工酶谱。结果:F₁代的光合面积大、叶绿素含量高、chla/b比值低,净光合速度高, 生长量高于亲本米斛,接近亲本铜皮石斛,产量略高于2亲本;同时保持较高有效成分,有效成分高于亲本铜皮石斛,接近亲本米斛。F₁代结合了2亲本的优点。结论:霍山石斛F₁代的生理特性和产量、品质得到极大改善,可以通过种间杂交的方法对霍山石斛进行种质改良。

Studies on the growth, chemical components and physiological characteristics of F1 generation of Dendrobium huoshanense

Objective: Through a comparison between F₁ and its' parents on the growth, chemical components and physiology, this study aims to find the possibility of selecting new dendrobium hybrids with high yield and good quality. Method: To determinate the growth, chemical components, photosynthesis, hormones and isoenzyme in the plants. Result: Photosynthetic area, content of chlorophyll, net photosynthesis and yield of F₁ generation are higher than those of the parents; chla/b rate is lower; growth is almost the same as in Dendrobium moniliforme; content of chemical components are the same as in D. huoshanense. F₁ is approaching of advantages of parents. Conclusion: Physiological characters, yield and quality of F₁ are greatly improved by hybridization.