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山茶属植物的染色体数目和核型
引用本文:李光涛, 梁涛,.山茶属植物的染色体数目和核型[J].广西植物,1990,10(2):127-137+191.
作者姓名:李光涛  梁涛  
作者单位:云南茶叶研究所 勐海 (李光涛),云南茶叶研究所 勐海(梁涛)
摘    要:本文对已报道的(包括作者的研究)山茶属植物的染色体数目和核型作一简单的讨论,结合地理分布情况,提出由二倍体向多倍体进化可能是山茶属植物进化的一个重要途径。山茶属植物的核型多为Stebbins核型分类的“2A”型,表明山茶属植物是一个较原始的种系。本文中12种的染色体数目和2种的核型为首次报道。

关 键 词:山茶属  染色体数目  核型  多倍体进化

CHROMOSOME NUMBERS AND KARYOTYPES IN THE GENUS CAMELLIA
Li,Guang Tao and Liang,Tao.CHROMOSOME NUMBERS AND KARYOTYPES IN THE GENUS CAMELLIA[J].Guihaia,1990,10(2):127-137+191.
Authors:Li  Guang Tao and Liang  Tao
Abstract:The genus Camellia were originated in China, which is typical of the Cathaysian flora 1]. Up to now over 285 species (including subspecies and varieties) were found in the genus. Among them on the chromosome number of seventy-six taxa were counted (table 1 ), and the karyotypes of twenty-three species were studied (table 3). Among the seventy-six species of the genus studied, forty-seven (61.84%) are known to be diploid and twenty-six (34.21%) are made up of polyploid series. Wild species are mostly diploid, cultivated species are various from diploid to octoploid. The karyotypes of twenty-three species of the genus studied are mostly 2A-type of Stebbins karyotypic symmetry 30]. The results showed that the genus Camellia is more primitive in evolution. In addition, the polyploid evolution of some Camellia species were also discussed in the paper. The chromosome numbers of eleven species and the karyotypes of two species in this paper were reported for the first time.
Keywords:Camellia  Chromosome number  Karyotype  Polyploid evolution
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