Breeding of auto-tetraploid cultivars of Camellia japonica L.

山茶同源四倍体品种的选育。

• 批准号: 05660039
• 负责人: UEMOTO Shunpei
• 金额: $ 1.41万
• 依托单位: Oita junior college
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05660039/
• 关键词: Breeding; Auto-tetraploid; Camellia japonica L

Camellia japonica L.is widely distributed from Southeast Asia to Japan. More than ten thousand cultivars have been bred all over the world. In Europe, United States of America and Australia, the Camellia garden cultures have been very popular as the ornamental trees and shrubs. The new cultivars that have more cold resistance and more heat resistance are hoped. This study was carried out to produce the auto-tetraploid cultivars that have some merits, for example, the giantness of leaves or flowers, the cold resistance and the heat resistance.The auto-tetraploid individuals have not been observed in Camellia genus. We examined the seedlings obtained from some auto-triploid cultivars. The "Kumagae" which belongs to Higo tubaki group was reported to be auto-triploid cultivars. The survey of the numbers of the chromosomes and the stomata was carried out with the light microscope which was bought by Grant-in-Aid for Scientific Research. The large stomata were observed in the seedling No.12 obtained from "Kumagae". The number of the stomata per one microscopic field at magnification 10*20 of the seedling No.12 is so small that the seedling is probably suggested to be tetra-ploid. For the future study, some other allo-polyproid cultivars were collected this year.

L.is广泛分布于东南亚至日本.全世界已培育出一万多个品种。在欧洲、美国和澳大利亚，山茶花作为观赏树木和灌木已非常流行。希望培育出抗寒性更强、耐热性更强的新品种。本研究旨在培育出具有叶或花巨大、耐寒、耐热等优点的同源四倍体品种，在山茶属植物中尚未观察到同源四倍体个体。我们检查了从一些同源三倍体品种获得的幼苗。据报道，属于Higo tubaki组的“Kumagae”是同源三倍体品种。利用国家科研资助项目购置的光学显微镜，对染色体数目和气孔数目进行了观察。从“Kumagae”获得的12号幼苗中观察到大气孔。12号苗在10 × 20倍的显微视野中气孔数目很少，可能是四倍体。为了进一步研究，今年还收集了一些其他的异源多倍体品种。