摘要： 以从日本引进的24个大花蕙兰品种为材料,检索英国皇家园艺学会(RHS)60年(1941-2001)的大花蕙兰品种(GREX)登录情况。结果表明,这些品种涉及13个原生种,不同的原生种在品种形成过程中参与的频次有很大差异,如美花兰(C.insigne)、碧玉兰(C.lowianum)、独占春(C.eburneum)和虎头兰(C.hookerianum)等在这些品种中的遗传贡献较大,其余如红柱兰(C.erythrostylum)、西藏虎头兰(C.tracyanum)等的遗传贡献则因品种而有较大差异。根据各原生种的遗传贡献进行不同品种的遗传多样性分析,可以知道引进的大花蕙兰品种对原生种的遗传多样性保存量最多的是C.Wakakusa、C.Melody Fair、C.Lunagrad和C.Walu,原生种70%以上的多样性遗传基础在这4个品种中可以体现。对原生种的遗传多样性保存量最少的是C.Sarah Jean,只有39.7%。品种的原生种的遗传多样性保存量可以作为大花蕙兰的育种亲本选择指标之一,用于指导提高杂交后代的遗传多样性。

关键词: 大花蕙兰, 系谱分析, 遗传多样性

Abstract: The retrieval of cymbidium family tree by entry the website of British Royal Horticulture society (RHS)revealed that the 24 cymbidium cuhivars imported from Japan were registered in 1941—2001.Thirteen primeval species were involved in breeding of these cuhivars.C.insigne, C.10wianum, C.eburneum, C.hookerianum contributed greatly in the breeding of them.The contribution of C.erythrostylum, C.tracyanum etc.was less or more in differentcultivars.The genetic diversity was analyzed based on the contribution of thirteen primeval species.The conclution was that the C.Wakakusa, C.Melody Fair, C.Lunagrad and C.Walu has more genetic diversity than the others.There was still more than 70%primeval genetic diversity in these 4 cuhivars.But some cuhivars has less primeval genetic diversity。e.g.C.Sarah Jean has the lest primeval genetic diversity, which was only 39.7%.The retaining quantity of primeval genetic diversity could be a important estimation yardstick of parents selection in cross breeding of cymbidi “m hybridum.

Key words: Cymbidium hybridum, Family tree analysis, Genetic diversity

中图分类号: 

• S682.31