Isolated Microspore Culture and Ploidy Variation of Regenerated Plants in Ornamental Kale Microspore Embryogenesis and Plant Regeneration of Brassica Plants Advances in Ploidy Breeding of Fruit Trees Identification of Kiwifruit Ploidy Using Flow Cytometry A Method to Improve Sample Preparation for Observing Stomata Guard Cells in Triticum aestivum Advances in Ploidy Breeding of Fruit Trees