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Genetic diversity and population structure in Vallisneria spinulosa (Hydrocharitaceae)
文献类型：期刊论文
| 作者 | Chen, Lei; Xu, Liming; Huang, Hongwen |
| 刊名 | AQUATIC BOTANY
 |
| 出版日期 | 2007 |
| 卷号 | 86期号:1页码:46-52 |
| 关键词 | clonal diversity genetic diversity genetic structure hydrochory hydrologic connectivity Vallisneria spinulosa |
| ISSN号 | 0304-3770 |
| DOI | 10.1016/j.aquabot.2006.09.001 |
| 英文摘要 | Vallisneria spinulosa is a dominant submerged macrophyte in lakes of the middle-lower reaches of the Yangtze River. Allozyme variation, clonal diversity and population genetic structure were investigated for a total of 396 individuals sampled from 10 extant populations. V spinulosa maintained high levels of genetic variation both at the species (P = 46.2 A = 1.69, H-e = 0.23) and at the population level (P = 46.2, A = 1.58, H-e = 0.21). Although aquatic macrophytes commonly exhibit low genetic variation within populations, the obligately outcrossing mating system of V spinulosa and pervasive gene flow likely account for the high levels of diversity maintained within populations. All V spinulosa populations contained high clonal diversity with a mean proportion of distinguishable genotypes of 0.57 and a mean Simpson's diversity index of 0.95, indicating that populations were founded sexually or that successful seedling recruitment occurred after initial colonization. Partitioning of genetic diversity revealed a surprisingly low population differentiation (G(ST) = 0.06) as compared to other hydrophilous angiosperms. No evidence of isolation-by-distance was found (r = 0.056, P = 0.312), suggesting that gene flow was not restricted geographically. The UPGMA cluster analysis revealed that several widely separated populations grouped together, suggesting long-distance gene flow among populations. The high vagility of V spinulosa and extensive hydrologic connectivity among populations have facilitated long-distance gene flow and resulted in the pattern of population genetic structure in V spinulosa. (c) 2006 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Plant Sciences ; Marine & Freshwater Biology |
| 语种 | 英语 |
| WOS记录号 | WOS:000243613200007 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/1145]  |
| 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, Wuhan Bot Garden, Wuhan Inst Bot, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Lei,Xu, Liming,Huang, Hongwen. Genetic diversity and population structure in Vallisneria spinulosa (Hydrocharitaceae)[J]. AQUATIC BOTANY,2007,86(1):46-52. |
| APA | Chen, Lei,Xu, Liming,&Huang, Hongwen.(2007).Genetic diversity and population structure in Vallisneria spinulosa (Hydrocharitaceae).AQUATIC BOTANY,86(1),46-52. |
| MLA | Chen, Lei,et al."Genetic diversity and population structure in Vallisneria spinulosa (Hydrocharitaceae)".AQUATIC BOTANY 86.1(2007):46-52. |
入库方式： OAI收割
来源：武汉植物园
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