Types of Polyploids in Plants Euploids Autopolyploids- Triploid 3x, Tetraploid 4x, Pentaploid 5X e.g. Potato(2x, 3x, 4x, 5x X=12); Sweet potato(2n=6x, 90) Allopolyploid- Tetraploid 4x, Hexaploid 6x, Octaploid &x, e.g. Watermelon(3x, seedless Autoallopolyploid- Pentaploid 5x, Hexaploid 6x, eg. Pheu pratense梯牧草(6x=42, AAAABB)Types of Polyploids in Plants Euploids Autopolyploids – Triploid 3x, Tetraploid 4x, Pentaploid 5x, … e.g. Potato (2x, 3x, 4x, 5x x=12); Sweet potato (2n=6x, 90) Allopolyploid – Tetraploid 4x, Hexaploid 6x, Octaploid 8x, … e.g. Watermelon (3x, seedless) Autoallopolyploid – Pentaploid 5x, Hexaploid 6x, … e.g. Pheum pratense 梯牧草 (6x=42, AAAABB)