蝴蝶兰Phalaenopsis ‘Frigdaas Oxford’和Phal. SH49正反交后代观赏性状遗传倾向研究

摘要

以花色、花斑类型、花朵质地、株型大小、花朵大小等为蝴蝶兰杂交育种的目标性状,对Phalaenopsis ‘Frigdaas Oxford’和Phal.SH49及其正反交后代群体的观赏性状进行分析,研究育种目标性状在后代中的表现与分离.结果表明:正反交F1代的分离规律和变化趋势基本一致,根据主要花部性状特点分为4个组群(G01～G04),杂交F1代在9个数量性状的平均值表现均较中亲值明显降低,适合选育小株型或小花型后代个体;杂交F1代在花底色、花斑类型、花朵材质等质量性状上变化丰富,不同花色的遗传能力与覆盖能力有所差别,存在较深花斑色覆盖遮挡住较浅花底色的花色表现,且出现了亲本没有的花斑变化,这些性状的分离特征和遗传倾向将给今后新个体或新单株的目标性状预测筛选提供更多参考和依据.%Phalaenopsis ‘Frigdaas Oxford',Phd.SH49 cultivars and the F1 offspring of reciprocal crossing were used to analyze the genetic tendency of the ornamental characters,such as flower color,flower pattern,flower texture,plant size and flower size,etc.The results showed as follow that the separation tendency was basically the same in both the cross and reciprocal cross generation.The F1 offspring were divided into 4 groups (G01-G04) based on the flower characteristics.The mean values of the 9 quantitative characters in the F1 offspring were significantly lower than the midparent value,which were suitable for the breeding of small plant size or small flower type offspring.The qualitative characters of the F1 offspring showed various separation on flower ground color,flower pattern and flower texture,etc.The heritability and the coverage degree differed in different color,that the darker color pattern could cover the lighter ground color,and furthermore there were new color pattern appears.These characteristics separation and genetic tendency could support in selecting new individuals or new cultivars in the future,and this research could supply directed breeding reference for certain floral traits.