碩士 / 國立臺灣師範大學 / 生命科學系 / 106 / Climate change and geographical distribution may affect population divergence and genetic structure of the species. To explore the effect of regional environmental differences on genetic structure, this study used the wide distribution and elevation difference of Acer caudatifolium and A. rubescens as material. This study used 17 microsatellites to detect climatic and geographic factors to correlate with genetic variation and to assess the genetic structure. The AMOVA showed the significant genetic differentiation between the two species in microsatellites, and also supported the assignment results. The results of RDA revealed that the individual genetic variation of the two species was related to the climate and geographical factors which revealed that the climatic and spatial effects may dominate the genetic distribution of the two species. In addition, the correlation between geographical factors and the genetic distribution of A. caudatifolium was more significant that indicated the isolation effect of physical barrier of mountain ranges on the gene flow among populations of low-elevational species. Therefore, this study inferred the climatic and geographical factors may produce different pressures on genetic variation of species at different elevations, which reflected the key rule of environmental heterogeneity on the maintenance of fundamental niches and genetic differentiation between closely related species.
| Identifer | oai:union.ndltd.org:TW/106NTNU5112020 |
| Creators | Tseng, Yi-Ting, 曾怡婷 |
| Contributors | Liao, Pei-Chun, 廖培鈞 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 66 |
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