Genetic discontinuities and abundant historical gene flow in wild lotus Nelumbo nucifera populations from the Yangtze River
文献类型：期刊论文
| 作者 | Chen, Yuan-Yuan1,4; Wang, Wu-Chao1,4; Fan, Xiang-Rong1,2,4,5; Sun, Jun-Yao1,4; Li, Wei1,4; Li, Xiu-Ling3; Liu, Yan-Ling4 |
| 刊名 | AQUATIC BOTANY
 |
| 出版日期 | 2019-10-01 |
| 卷号 | 158页码:8 |
| 关键词 | Nelumbonucifera Genetic Connectivity Gene flow Genetic structure Microsatellite variation Habitat fragmentation |
| ISSN号 | 0304-3770 |
| DOI | 10.1016/j.aquabot.2019.103130 |
| 英文摘要 | Wild populations of Nelumbo nucifera are valuable genetic resources and provide significant ecological functions for aquatic ecosystems. However, they have suffered from habitat fragmentation and degradation. Here, the genetic connectivity and variation of N. nucifera wild populations were analysed based on 22 microsatellite markers and 10 populations along the Yangtze River. Abundant historical gene flows were found among populations (Nm: 1.806-3.735). In contrast, low levels of recent migration rates were revealed and only two migrants were detected in the first generation among populations. The results indicated that habitat deteriorations have resulted in dramatically reduced gene flow, and the seasonal floods failed to act as a valid path for migration. The bidirectional gene flows, combined with the lack of accumulation effects in downstream populations, suggested that both river flow and zoochory (or human activity) contributed to gene exchange. High levels of genetic differentiation were found in all pairs of populations (F-ST: 0.208 - 0.666; G(ST)": 0.306 - 0.866) and in the global estimate across all populations (F-ST = 0.403, G(ST)" = 0.593), indicating genetic discontinuities among populations. The genetic depauperation (H-E = 0.273) and obvious genetic structure in N. nucifera populations were explained by reduced gene flow and accentuated genetic drift, combined with the inbreeding and repeated genetic bottlenecks. Based on these results, a conservation strategy for protecting all isolated populations to maintain genetic diversity of wild lotus is proposed, and hydrological connectivity should be facilitated across the aquatic system. |
| 资助项目 | Talent Program of Wuhan Botanical Garden, CAS[Y855291B01] ; National Scientific Foundation of China[30870259] ; China's Ministry of Science & Technology under Grant of the National Key R&D Programme of China[2016YFA0601001] |
| WOS研究方向 | Plant Sciences ; Marine & Freshwater Biology |
| 语种 | 英语 |
| WOS记录号 | WOS:000518579600009 |
| 出版者 | ELSEVIER |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/15013]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Chen, Yuan-Yuan; Liu, Yan-Ling |
| 作者单位 | 1.Chinese Acad Sci, Hubei Key Lab Wetland Evolut & Ecol Restorat, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China 2.Tibet Univ, Res Ctr Ecol & Environm Qinghai Tibetan Plateau, Lhasa 850000, Tibet Autonomou, Peoples R China 3.Linyi Univ, Coll Life Sci, Linyi 276000, Shandong, Peoples R China 4.Chinese Acad Sci, Key Lab Aquat Plant & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China 5.Tibet Univ, Coll Sci, Lhasa 850000, Tibet Autonomou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yuan-Yuan,Wang, Wu-Chao,Fan, Xiang-Rong,et al. Genetic discontinuities and abundant historical gene flow in wild lotus Nelumbo nucifera populations from the Yangtze River[J]. AQUATIC BOTANY,2019,158:8. |
| APA | Chen, Yuan-Yuan.,Wang, Wu-Chao.,Fan, Xiang-Rong.,Sun, Jun-Yao.,Li, Wei.,...&Liu, Yan-Ling.(2019).Genetic discontinuities and abundant historical gene flow in wild lotus Nelumbo nucifera populations from the Yangtze River.AQUATIC BOTANY,158,8. |
| MLA | Chen, Yuan-Yuan,et al."Genetic discontinuities and abundant historical gene flow in wild lotus Nelumbo nucifera populations from the Yangtze River".AQUATIC BOTANY 158(2019):8. |
入库方式： OAI收割
来源：武汉植物园
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