Zhang x; Yue H 1990

• Authors: Zhang x; Yue H
• Title: The preliminary study on polyploid of Antirrhinum-majus l
• Location: Acta horticulturae sinica, 17 (1). 1990. 76-80.
• Abstract: in this paper, the method of inducing the polyploid of Antirrhinum majus l. by the water solution of colchicine was described, the seedling of the tetraploid (2 n = 32) and the diploid (2 n = 16) were observed and compared in morphology, cytology, and the length of stoma. the results showed that the mutation frequency was better at the solution concentration of 0.3-0.5% and treatment for 24 hours the mutation frequency was 10-11.4%. most of chromosomes of mutated plants was mixoploidy under microscopy. however, the tetraploid plant could be obtained only by the cutting of the mixoploids which showed with polyploid characters. the morphology of the tetraploid of Antirrhinum majus l. was obviously different from the diploid plants in each development stage (from the cotyledon stage to seedling). the thickness of the cotyledon was increased, but the cotyledon was deformed. the stomata were enlarged, and the thickness and the size of the petal were increased. the period of flowering was later from 1 to 3 weeks and the pollens under the self-pollination were sterile. the main reason of sterile under the self-pollination is the abnormality of the meiosis of pollen mother cells in tetraploid and the abortion of all pollens.