Preliminary Studies on Polyploidy Mutation of Cut Flower Gerbera jamesonii Bolus Polyploid Induction of coloured Zantedeschia aethiopica Genome Dosage Effect on Three Kinds of Isozyme Expression Patterns in Cucumis Polyploid Induction of coloured Zantedeschia aethiopica Molecular-cytological Identification of Triploid Bermudagrass Chromosome Number Variation In Vitro Induction of Tetraploid from Mature Embryos of ‘Golden Delicious’ Apple Regeneration of Hexaploid Plants of Cherry Dwarf Rootstock ‘Gisela 6‘ from in vitro Leave Treated with Colchicine Studies on 45S rDNA-FISH of Natural Polyploids in Citrus sinensis Osbeck.‘Hongjiangcheng’ Colchicines Chemical Induction During Propagaion of Protocorm-like Bodiesof Oncidium in Liquid Culture Polyploid Induction of Nobile-type Dendrobium Endopolyploidization Phenomenon of Chinese Cabbage (Brassica rapa ssp. pekinensis)