A cytotaxonomic study on the genus Pyrenaria complex (Theaceae)

	A cytotaxonomic study on the genus Pyrenaria complex (Theaceae)
	Yang, SX; Gong, X; Peng, H; Wu, ZY
	2000-07-01
发表期刊	CARYOLOGIA
ISSN	0008-7114
卷号	53 期号:3-4 页码:245-253
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.
关键词	Chromosome Cytotaxonomy Karyomorphology Parapyrenaria Pyrenaria Theaceae Tutcheria
学科领域	Genetics & Heredity
收录类别	SCI
语种	英语
WOS记录号	WOS:000166989000010
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/14061
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	Chinese Acad Sci, Kunming Inst Bot, Dept Phytotaxonomy & Phytogeog, Kunming 650204, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Yang, SX,Gong, X,Peng, H,et al. A cytotaxonomic study on the genus Pyrenaria complex (Theaceae)[J]. CARYOLOGIA,2000,53(3-4):245-253.
APA	Yang, SX,Gong, X,Peng, H,&Wu, ZY.(2000).A cytotaxonomic study on the genus Pyrenaria complex (Theaceae).CARYOLOGIA,53(3-4),245-253.
MLA	Yang, SX,et al."A cytotaxonomic study on the genus Pyrenaria complex (Theaceae)".CARYOLOGIA 53.3-4(2000):245-253.

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