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pp.399-405
Floral pattern plays a vital role in flower structure. The most basic factors that make up the floral pattern are spots and lines in Sedirea japonica. These factors were expressed in a various pattern according to their location and the type of the flower. Frequent expression pattern is higher in the left side of lateral sepal and labellum than petal and dorsal sepal. The expression type in one plant is usually very different according to right or left of sepals, flowering orders, and flowering times and in some individuals, expression pattern remained constant in all flowers. Two hybrids from the cross between Hygrochilus parishii and H. pasishii var. purpureus hybrid (Hongjadan) have shown similar flower characteristics (flower size, flower background color, and pattern distribution) to those of H. pasishii with the exception of the pattern, size, and expression of the number of spots, and pattern shape of labellum including morphology. The flower of an offspring from Hongjadan x S. japonicum (K10) showed petals and sepals without pattern, red flecks, red spot, and red sectors. The shape and back ground color of labellum were similar to those of Hongjadan and S. japonica. The results of this study will be helpful for breeding new cultivars of Sedirea japonica.
