A karyomorphological study of 40 species in 11 genera of the Magnoliaceae from China

doi:10.1360/aps040092

CORC > 武汉植物园 > 中国科学院武汉植物园

	A karyomorphological study of 40 species in 11 genera of the Magnoliaceae from China
	Meng, AP ; Wang, HC ; Li, JQ ; Sima, YK
刊名	ACTA PHYTOTAXONOMICA SINICA
	2006
卷号	44 期号:1 页码:47-63
关键词	Magnoliaceae karyotype karyomorphology chromosome number China
ISSN号	0529-1526
DOI	10.1360/aps040092
英文摘要	In this paper, 40 species in 11 genera of the Magnoliaceae from China were karyomorphologically investigated for a better understanding of the intergeneric relationships in the family and the systematic positions of some species, particularly those in the genus Manglietia. The 20 Manglietia species studied are all diploid with 2n=38, indicating that in this genus the speciation may have taken place predominantly at the diploid level and that minor structural changes of chromosomes may have resulted in distinct morphological divergence. In the genus Magnolia, cytotypes with various ploidy levels from 2x to 6x have been found, which may be, at least to some degree, associated with the wide distributional range and complex gross-morphological variation of the genus. Our results indicate that Manglietia should be an independent genus from Magnolia and do not support the treatment of merging them as a genus. All the Michelia species already with chromosome numbers are diploid with 2n=38, while most of the species in Magnolia subgen. Yulania are polyploid, suggesting that Michelia is not closely allied with Yulania and that the two groups should not be merged as a genus. All Parakmeria members are polyploid. It is noteworthy that cytological evidence is generally less informative in clarifying the intergeneric relationships of the Magnoliaceae than the interspecific relationships within a given genus of the family because reticulate evolution may have extensively occurred in this family. Systematic positions of some species in Manglietia are discussed based on evidence from cytology, morphology and geographical distribution.
WOS研究方向	Plant Sciences
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000235055900002
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/1187]
专题	中国科学院武汉植物园
通讯作者	Li, JQ
作者单位	1.Chinese Acad Sci, Wuhan Bot Garden, Wuhan 430074, Peoples R China 2.Yunnan Acad Forestry, Kunming 650204, Peoples R China
推荐引用方式 GB/T 7714	Meng, AP,Wang, HC,Li, JQ,et al. A karyomorphological study of 40 species in 11 genera of the Magnoliaceae from China[J]. ACTA PHYTOTAXONOMICA SINICA,2006,44(1):47-63.
APA	Meng, AP,Wang, HC,Li, JQ,&Sima, YK.(2006).A karyomorphological study of 40 species in 11 genera of the Magnoliaceae from China.ACTA PHYTOTAXONOMICA SINICA,44(1),47-63.
MLA	Meng, AP,et al."A karyomorphological study of 40 species in 11 genera of the Magnoliaceae from China".ACTA PHYTOTAXONOMICA SINICA 44.1(2006):47-63.