Ploidy variation in Buddleja L. (Buddlejaceae) in the Sino-Himalayan region and its biogeographical implications
Chen, G ; Sun, WB ; Sun, H
2007
发表期刊BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN0024-4074
卷号154期号:3页码:305-312
摘要The chromosome numbers of 27 populations of Buddleja, comprising 14 species, were counted. The basic chromosome number of all species was x = 19, confirming previous reports. Different ploidy levels (2n = 38, 76, 114, 228) were observed in these taxa, representing diploids, tetraploids, hexaploids, and dodecaploids, respectively. The chromosome numbers of B. yunnanensis, B. brachystachya, and B. macrostachya are reported for the first time. The tetraploid 2n = 76 is a new ploidy level for B. myriantha. Particular attention was given to B. macrostachya, because of the variation in morphology and ploidy level between isolated populations of this species. Two types of interphase nuclei were recognized: the complex chromocentre type in B. macrostachya and the simple chromocentre type in the other species. Biogeographically, most of the polyploidy in the Asiatic species occurs in the Sino-Himalayan region. It seems to be associated with the uplift of the Himalayan Mountains, the orogeny of this region playing an important role in the evolution of polyploidy in these taxa. (c) 2007 The Linnean Society of London. Botanical Journal of the Linnean Society, 2007, 154, 305-312.
关键词Basic Chromosome Number Biogeography Evolution Interphase Nuclei
学科领域Plant Sciences
收录类别sci
语种英语
WOS记录号WOS:000248372200002
引用统计
被引频次:30[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/2491
专题资源植物与生物技术所级重点实验室
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Chen, G,Sun, WB,Sun, H. Ploidy variation in Buddleja L. (Buddlejaceae) in the Sino-Himalayan region and its biogeographical implications[J]. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2007,154(3):305-312.
APA Chen, G,Sun, WB,&Sun, H.(2007).Ploidy variation in Buddleja L. (Buddlejaceae) in the Sino-Himalayan region and its biogeographical implications.BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,154(3),305-312.
MLA Chen, G,et al."Ploidy variation in Buddleja L. (Buddlejaceae) in the Sino-Himalayan region and its biogeographical implications".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 154.3(2007):305-312.
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