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题名: A cytotaxonomic study on the genus Pyrenaria complex (Theaceae)
作者: Yang, SX; null(龚洵); null(彭华); Wu, ZY
刊名: CARYOLOGIA
关键词: chromosome ; cytotaxonomy ; Karyomorphology ; Parapyrenaria ; Pyrenaria ; Theaceae ; Tutcheria
英文摘要: Eleven species (including 18 samples) of the genus Pyrenaria complex, i.e., Pyrenaria, Tutcheria and Parapyrenaria in the Camellioideae of the family Theaceae, were karyomorphologically in investigated. Features common to all the species investigated include: (1) the simple chromocenter type of the interphase nuclei; (2) the chromosome number of 2n=30 and (3) the small chromosomes with the gradually decreased sizes. The basic chromosome number of x=15 is confirmed for all taxa. AU species investigated are diploid. Only a few unimportant karyomorphological differences were found among these taxa, such as the variation of the number of the median, the submedian and the subterminal centromeric chromosomes, the mean arm ratio, the ratio of the longest chromosome length / shortest chromosome length, and the karyotype asymmetry. These differences show no correlation with the morphological variation and the taxonomic circumscriptions of these taxa. Karyomorphological data provides further evidence for merging Tutcheria and Parapyrenaria into and establishing the genus Pyrenaria in its broad sense (Pyrenaria s.l.). Moreover, karyomorphological data suggest that Pyrenaria s.l. might have a close affinity with and is more primitive than Camellia.
出版日期: 2000-07-01
卷号: 53, 期号:3-4, 页码:245-253
语种: 英语
ISSN号: 0008-7114
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/14061
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Dept Phytotaxonomy & Phytogeog, Kunming 650204, Yunnan, Peoples R China

Recommended Citation:
Yang, SX; Gong, X; Peng, H; Wu, ZY.A cytotaxonomic study on the genus Pyrenaria complex (Theaceae),CARYOLOGIA,2000,53(3-4):245-253
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