Euphorbia genus with the bracts and non-functionality of the small cup-shaped inflorescence of red (Euphorbia) methods for making the interspecific hybrid plant

摘要

PROBLEM TO BE SOLVED: To provide Euphorbia interspecific hybrid plants such as poinsettia and to provide methods for making the same.SOLUTION: The invention relates to developing diploid, triploid and tetraploid interspecific hybrid plants, which are derived from the production and crosses of tetraploid, with a colchicine treatment or the like, between Euphorbia pulcherrima as a male plant and Fhybrids of Euphorbia pulcherrima×Euphorbia cornastra as a female plant. In addition to providing the diploid, triploid and tetraploid interspecific hybrid plants and plant parts, the invention provides methods for making triploid interspecific hybrid plants with non-functional small cyathia and methods for making tetraploid interspecific hybrid plants with non-functional small cyathia and red bracts.