Morphological and cytotype variation of wild kiwifruit (Actinidia chinensis complex) along an altitudinal and longitudinal gradient in central-west China

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	Morphological and cytotype variation of wild kiwifruit (Actinidia chinensis complex) along an altitudinal and longitudinal gradient in central-west China
	Li, Dawei 2; Liu, Yifei 1; Zhong, Caihong 2; Huang, Hongwen 1
刊名	BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
	2010-09-01
卷号	164 期号:1 页码:72-83
关键词	breeding cytogeography ecogeographical gradient hybrid zones polyploidy reproductive barriers
ISSN号	0024-4074
英文摘要	The Actinidia chinensis complex, a group of commercially important fruits (kiwifruit), is a complex of functionally dioecious lianas of variable ploidy. To understand the cytogeography better and to facilitate breeding in this complex, we examined the ploidy and morphological variations in 16 natural populations of A. chinensis var. chinensis and A. chinensis var. deliciosa across an ecogeographical gradient. Four ploidy levels were found, var. chinensis consisting of diploids and tetraploids and var. deliciosa consisting of tetraploids, pentaploids and hexaploids. Hexaploids were centred in the western Yun-Gui plateau, tetraploids coexisted with hexaploids or diploids in the middle Yun-Gui plateau and the Wuling-Xuefeng mountains, and diploids occurred in the eastern Wuling-Xuefeng mountains and the Hunan foothills. These findings indicate a gradual, clinal transition from hexaploid to diploid across the elevational and longitudinal gradient. The clear geographical segregation of diploids and hexaploids may have arisen from their differential ecological adaptation in response to altitude and climate, whereas the coexistence of cytotypes (2x-4x, 4x-6x and 4x-5x-6x) might be a result of reproductive barriers, with a particular contribution from the postzygotic reproductive isolation between ploidy races. The geographical pattern and morphological variation of cytotypes suggest a hybrid zone between the varieties in the Wuling-Xuefeng mountains. The differences in cytotypes which have arisen as a result of ecological adaptation, distribution and morphological characteristics will provide important baseline data for the selection of germplasm and the breeding of kiwifruit. (C) 2010 The Linnean Society of London, Botanical Journal of the Linnean Society, 2010, 164, 72-83.
资助项目	Chinese Academy of Sciences (CAS)[KSCX2-YW-N-061] ; National Science Foundation of China[30771479]
WOS研究方向	Plant Sciences
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000281852000007
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/927]
专题	中国科学院武汉植物园
通讯作者	Huang, Hongwen
作者单位	1.Chinese Acad Sci, S China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China 2.Chinese Acad Sci, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Li, Dawei,Liu, Yifei,Zhong, Caihong,et al. Morphological and cytotype variation of wild kiwifruit (Actinidia chinensis complex) along an altitudinal and longitudinal gradient in central-west China[J]. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2010,164(1):72-83.
APA	Li, Dawei,Liu, Yifei,Zhong, Caihong,&Huang, Hongwen.(2010).Morphological and cytotype variation of wild kiwifruit (Actinidia chinensis complex) along an altitudinal and longitudinal gradient in central-west China.BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,164(1),72-83.
MLA	Li, Dawei,et al."Morphological and cytotype variation of wild kiwifruit (Actinidia chinensis complex) along an altitudinal and longitudinal gradient in central-west China".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 164.1(2010):72-83.