蝴蝶兰Phalaenopsis'Santa Rosa'和Phal.'Cadiz'正反交F1代花部性状分离研究OA

To investigate the inheritance patterns of floral traits in Phalaenopsis,this study used'Santa Rosa'(light purple with purple-red stripes)and'Cadiz'(deep purple-red blotches)as parents.Through reciprocal crosses,an F,segregating population was constructed.Key traits including perianth color,color of the labellum callus and mid-lobe,flower shape,and petal arrangement were systematically investigated.The results showed significant differences in flower color segregation patterns between the reciprocal crosses.In the direct cross('Santa Rosa'♀ ×'Cadiz'♂),the offspring were predominantly deep purple-red(51.24％).In the reciprocal cross('Cadiz'♀ ×'Santa Rosa'♂),the offspring were mainly rose-pink to pink with vein stripes(65.52％).The colors of the labellum callus and mid-lobe exhibited coordinated changes with perianth color.When the perianth was deep purple-red,the labellum callus was yellow with deep purple-red blotches or deep purple-red,and the mid-lobe showed variegated patterns such as purple-red spots or patches.When the perianth lacked purple-red pigmentation,the labellum callus was yellow with evenly distributed red dots,and the mid-lobe displayed solid colors such as deep red in the upper part and rose-red in the lower part.Flower shape was predominantly flat,consistent with the parents,while outward-curved types only appeared in offspring with deep purple-red flowers.This study provides important data on the inheritance of flower color and shape traits in Phalaenopsis,offering theoretical and practical guidance for directional breeding.