When interspecific prezygotic barriers break down: hybridization between two Potamogeton species (P. wrightii and P. perfoliatus) and comparison of the artificial and natural hybrids

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	When interspecific prezygotic barriers break down: hybridization between two Potamogeton species (P. wrightii and P. perfoliatus) and comparison of the artificial and natural hybrids
	Zhang, Xiao-Lin 1; Li, Xiao-Xia 2; Ni, Le-Yi 1; Guo, You-Hao 2
刊名	PLANT SYSTEMATICS AND EVOLUTION
	2011-08-01
卷号	295 期号:1-4 页码:119-128
关键词	Artificial hybridization Prezygotic barriers Hybrids Fertility restoration Potamogeton
ISSN号	0378-2697
通讯作者	Zhang, XL (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China ; zhangxl@ihb.ac.cn ; nily@ihb.ac.cn ; yhguo@whu.edu.cn
中文摘要	Interspecific hybridization played an important role in speciation and evolution of angiosperms. Although the widespread occurrence of natural hybrids in the genus Potamogeton has been studied intensively, few successful experimental hybridization studies have been reported in this genus. In the present study, critical experimental hybridization was conducted using Potamogeton x intortusifolius, a natural hybrid widely distributed in China, and its parents (P. perfoliatus and P. wrightii). The absence of prezygotic barriers between P. wrightii and P. perfoliatus was observed, which contributes to the frequent hybridization of these species in nature. The pollen tube growth rates of P. perfoliatus were much faster than those of P. wrightii in the style of that species. However, the conspecific pollen tubes were competitively advantageous in P. perfoliatus styles. The interspecific hybridization could be applied bidirectionally, and 28 F1 hybrid individuals were successfully obtained from P. wrightii x P. perfoliatus, despite the low germination possibility of the hybrid seeds. Both the artificial and natural hybrids exhibited intermediate morphological characters but presented much lower fertility. The sterility of P. x intortusifolius is mainly due to its low female fitness. However, the offspring from P. wrightii x P. x intortusifolius indicated the potential for backcrossing in nature. This is the most successful attempt at artificial hybridization in this genus so far. The possible route for restoration of fertility and the fitness of the hybrids are also discussed in this paper.
英文摘要	Interspecific hybridization played an important role in speciation and evolution of angiosperms. Although the widespread occurrence of natural hybrids in the genus Potamogeton has been studied intensively, few successful experimental hybridization studies have been reported in this genus. In the present study, critical experimental hybridization was conducted using Potamogeton x intortusifolius, a natural hybrid widely distributed in China, and its parents (P. perfoliatus and P. wrightii). The absence of prezygotic barriers between P. wrightii and P. perfoliatus was observed, which contributes to the frequent hybridization of these species in nature. The pollen tube growth rates of P. perfoliatus were much faster than those of P. wrightii in the style of that species. However, the conspecific pollen tubes were competitively advantageous in P. perfoliatus styles. The interspecific hybridization could be applied bidirectionally, and 28 F1 hybrid individuals were successfully obtained from P. wrightii x P. perfoliatus, despite the low germination possibility of the hybrid seeds. Both the artificial and natural hybrids exhibited intermediate morphological characters but presented much lower fertility. The sterility of P. x intortusifolius is mainly due to its low female fitness. However, the offspring from P. wrightii x P. x intortusifolius indicated the potential for backcrossing in nature. This is the most successful attempt at artificial hybridization in this genus so far. The possible route for restoration of fertility and the fitness of the hybrids are also discussed in this paper.
学科主题	Plant Sciences; Evolutionary Biology
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Plant Sciences ; Evolutionary Biology
研究领域[WOS]	Plant Sciences ; Evolutionary Biology
关键词[WOS]	ISOZYME EVIDENCE ; CHLOROPLAST EVIDENCE ; MULTIPLE ORIGINS ; POLLEN VIABILITY ; X-SALICIFOLIUS ; NORTH-AMERICA ; POLLINATION ; SUDERMANICUS ; POPULATIONS ; MORPHOLOGY
收录类别	SCI
资助信息	National Natural Science Foundation of China[30430050]; China Postdoctoral Science Foundation[20100471210]
语种	英语
WOS记录号	WOS:000293026600009
公开日期	2011-11-09
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/16279]
专题	水生生物研究所_淡水生态学研究中心_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China 2.Wuhan Univ, Coll Life Sci, Lab Plant Systemat & Evolutionary Biol, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiao-Lin,Li, Xiao-Xia,Ni, Le-Yi,et al. When interspecific prezygotic barriers break down: hybridization between two Potamogeton species (P. wrightii and P. perfoliatus) and comparison of the artificial and natural hybrids[J]. PLANT SYSTEMATICS AND EVOLUTION,2011,295(1-4):119-128.
APA	Zhang, Xiao-Lin,Li, Xiao-Xia,Ni, Le-Yi,&Guo, You-Hao.(2011).When interspecific prezygotic barriers break down: hybridization between two Potamogeton species (P. wrightii and P. perfoliatus) and comparison of the artificial and natural hybrids.PLANT SYSTEMATICS AND EVOLUTION,295(1-4),119-128.
MLA	Zhang, Xiao-Lin,et al."When interspecific prezygotic barriers break down: hybridization between two Potamogeton species (P. wrightii and P. perfoliatus) and comparison of the artificial and natural hybrids".PLANT SYSTEMATICS AND EVOLUTION 295.1-4(2011):119-128.