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The hybridization of Iris spp.

Huang Su Zhen, Gu Yin, Han Yu Lin (Jiangsu Provincial Key Laboratory for Plant Ex Situ Conservation, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014)  
The interspecific and intraspecific cross breeding of Iris spp. have been carried out from 1994 to 1997. The results are as follows: Low cross compatibility has been found from two combinations of interspecific hybridization, the F 1 seedlings grew very weak and died within 6 to 8 weeks. High cross compatibility has been found from three combinations of intraspecific hybridization and their F 1 seedlings grew well; the flower color of the F 1 seedlings of Iris tectorum × I. tectorum f. alba and I. tectorum f. alba × I. tectorum is thought being controlled by single gene whereas that of I. germanica LP × I. germanica PP being controlled by multigene and the flower colour was separated. 7 new cultivars have been obtained: “Golden Purple”, “Colourful Ribbon”, “Golden Dancing Girl”, “Red Wave”, “Crystal Ball”, “Purple Cloud” and “ Purple Plate”.
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