A dynamic evolution of chromosome in subgenus Potamogeton revealed by physical mapping of rDNA loci detection

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	A dynamic evolution of chromosome in subgenus Potamogeton revealed by physical mapping of rDNA loci detection
	Wan, Tao 1; Zhang, Xiao-lin 2; Gregan, Juraj 3; Zhang, Ying 1; Guo, Pin 1; Guo, You-hao 1
刊名	PLANT SYSTEMATICS AND EVOLUTION
	2012-06-01
卷号	298 期号:6 页码:1195-1210
关键词	Potamogeton Interspecific hybridization Physical mapping of rDNAs Karyotype evolution Chromosome evolution
ISSN号	0378-2697
通讯作者	Guo, YH (reprint author), Wuhan Univ, Lab Plant Systemat & Evolutionary Biol, Coll Life Sci, Wuhan 430072, Peoples R China.
中文摘要	In this study, we analyzed 12 species in the subgenus Potamogeton (8 tetraploids and 2 diploids, 2 putative tetraploid hybrids) at the chromosomal level, including counting the chromosome number and physically mapping the rDNA. The extent of variation in the chromosome number and rDNA loci was determined in the Potamogeton species on both the inter- and intra-specific level. Moreover, one of the hybrid sets (P. perfoliatus a (TM), x P. wrightii a (TM) Euro) was picked for performing artificial pollination for producing F1 generation adults and for sequential morphological character analysis and FISH detection. After comparing the parental species and natural hybrids from three different geographic locations, the intraspecific variations of rDNA loci were revealed in sampled plants; in addition, comparisons between artificial F1 and natural hybrids (P. x intortusifolius) showed a rapid change of 45S rDNA loci in response to the interspecific hybridization. We also compared our results concerning rDNA patterns with phylogenetic documents to derive complementary clues to karoytype evolution and interspecific relationships. Based on frequent hybridizations and active clonal reproduction with weak genetic selection, the rDNA chromosomal repatterning, such as the gain or loss of rDNA loci together with rDNA movements, might be one trend of chromosome evolution in this genus.
英文摘要	In this study, we analyzed 12 species in the subgenus Potamogeton (8 tetraploids and 2 diploids, 2 putative tetraploid hybrids) at the chromosomal level, including counting the chromosome number and physically mapping the rDNA. The extent of variation in the chromosome number and rDNA loci was determined in the Potamogeton species on both the inter- and intra-specific level. Moreover, one of the hybrid sets (P. perfoliatus a (TM), x P. wrightii a (TM) Euro) was picked for performing artificial pollination for producing F1 generation adults and for sequential morphological character analysis and FISH detection. After comparing the parental species and natural hybrids from three different geographic locations, the intraspecific variations of rDNA loci were revealed in sampled plants; in addition, comparisons between artificial F1 and natural hybrids (P. x intortusifolius) showed a rapid change of 45S rDNA loci in response to the interspecific hybridization. We also compared our results concerning rDNA patterns with phylogenetic documents to derive complementary clues to karoytype evolution and interspecific relationships. Based on frequent hybridizations and active clonal reproduction with weak genetic selection, the rDNA chromosomal repatterning, such as the gain or loss of rDNA loci together with rDNA movements, might be one trend of chromosome evolution in this genus.
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]	REPETITIVE DNA-SEQUENCES ; IN-SITU HYBRIDIZATION ; ROBERTSONIAN TRANSLOCATIONS ; PHYLOGENETIC-RELATIONSHIPS ; GENOME STRUCTURE ; 18S-25S RDNA ; 18S RDNA ; 5S ; HYBRID ; POPULATIONS
收录类别	SCI
资助信息	National Natural Science Foundation of China[30430050]
语种	英语
WOS记录号	WOS:000304625900017
公开日期	2012-09-25
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/16903]
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.Wuhan Univ, Lab Plant Systemat & Evolutionary Biol, Coll Life Sci, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China 3.Univ Vienna, Dept Chromosome Biol, Max F Perutz Labs, Vienna, Austria
推荐引用方式 GB/T 7714	Wan, Tao,Zhang, Xiao-lin,Gregan, Juraj,et al. A dynamic evolution of chromosome in subgenus Potamogeton revealed by physical mapping of rDNA loci detection[J]. PLANT SYSTEMATICS AND EVOLUTION,2012,298(6):1195-1210.
APA	Wan, Tao,Zhang, Xiao-lin,Gregan, Juraj,Zhang, Ying,Guo, Pin,&Guo, You-hao.(2012).A dynamic evolution of chromosome in subgenus Potamogeton revealed by physical mapping of rDNA loci detection.PLANT SYSTEMATICS AND EVOLUTION,298(6),1195-1210.
MLA	Wan, Tao,et al."A dynamic evolution of chromosome in subgenus Potamogeton revealed by physical mapping of rDNA loci detection".PLANT SYSTEMATICS AND EVOLUTION 298.6(2012):1195-1210.