摘要
本文报道了岩芋属三个种的染色体数目和核型:岩芋Remusatia vivipara是三倍体,核型公式为K(2n)=3X=42=42m;早花岩芋R. hookeriana为二倍体,核型公式为K(2n)=2X=28=22m(6SAT)+6m(2SAT);秀丽岩芋R. ornala,也是三倍体,核型公式为K(2n)=3X=42=36m(3SAT)+3sm+3st。在岩芋属中,岩芋是一个比较原始的种,秀丽岩芋较进化。岩芋属是热带非洲和热带亚洲间断分布的小属,它的原始类群岩芋(R. vivipara)的原始居群(二倍体居群)分布在印度南部,因而作者没想,古南大陆是岩芋属的起源地,本属向热带亚洲的扩散是与第三纪时喜马拉雅造山运动相联系的。
The present paper deals with the cytogeographic study of 3 species on the genus Remusatia, Araceae. Their karyotypes can be formulated as fallowings:Remusatia vivipara (from Mt. Cangshan, Yunnan) K(2n) = 3X = 42 = 42m; R. hookeriana (also from Mt.Cangshan, Yunnan)K(2n) = 2X = 28 = 22m (6SAT) + 6sm (2 SAT); R. ornata (from Mt. Shizishan, Wuding Xian, Yunnan) K ( 2 n) = 3X = 42 = 36m (3SAT) + 3sm + 3st. In the genus Remusatia, R. vivipara is primitive and R. ornata is evolutional. Remusatia is a minor genus which distributes both in tropical Asia and in tropical West Africa(Came-roon). In South India (Kerala) the population of R. vivipara is diploid. And we conclude that the origin site of the genus Remusatia is Gondwana Land. The dispersal of the genus Remusatia towards tropical Asia would be related with the Himalayan movement.
出处
《云南植物研究》
CSCD
1989年第2期132-138,共7页
Acta Botanica Yunnanica
基金
国家自然科学基金资助项目
关键词
岩芋属
细胞地理学
天南星科
Remusatia
Karyotype
Cytogeography
Systematic Evolution
Origin
