Multiple Pleistocene refugia and recent diversification for Streptocarpus ionanthus (Gesneriaceae) complex: Insights from multiple molecular sources
文献类型：期刊论文
| 作者 | Kyalo, Cornelius M.2,3,4; Chen, Ling-Yun2,4; Lema, Mathias5; Malombe, Itambo1; Hu, Guang-Wan2,4; Wang, Qing-Feng2,4 |
| 刊名 | JOURNAL OF SYSTEMATICS AND EVOLUTION
 |
| 出版日期 | 2020-09-03 |
| 页码 | 16 |
| 关键词 | diversification and evolution genetic diversity genetic structure phylogeography Streptocarpus ionanthus |
| ISSN号 | 1674-4918 |
| DOI | 10.1111/jse.12658 |
| 英文摘要 | Streptocarpus ionanthus (Gesneriaceae) is endemic to Tanzania and Kenya, distributed in Tanga, Morogoro, and Kilifi regions. The species houses nine subspecies characterized by complex morphotypes and poorly understood evolutionary relationships, and thus is an ideal model for investigating evolutionary dynamics over time. Using multiple methods, we sought to test our hypothesis that the infraspecific taxa in Str. ionanthus are slightly variable and evolving populations. We first examined the genetic diversity, population differentiation, and phylogeographic structure among the populations of Str. ionanthus using both chloroplast and nuclear markers. We then estimated the divergence time of Str. ionanthus lineages and modeled past and future distribution. Despite Str. ionanthus exhibiting bottleneck events across its range, the populations maintain relatively high genetic diversity attributed to historical population admixture or local adaptation arising from habitat heterogeneity. The phylogeographic and genetic structure revealed a high connection among the Usambara mountains populations, while molecular dating suggested most diversification of haplotypes began similar to 1.32-0.18 million years ago and intensified toward the present, a conclusion of recent diversification. Phylogenetic relationship of Str. ionanthus cpDNA haplotypes revealed five main lineages with unique haplotypes that could be suggestive of past isolated refugia during the Pleistocene climate shifts. According to niche modeling, the stability of suitable areas during the Last Glacial Maximum (LGM) offered protective micro-habitats that have preserved the genetic diversity of Str. ionanthus to date. In conclusion, our findings suggest a complex Str. ionanthus with slightly variable lineages or populations attributed to multiple refugia and on the verge of divergence. |
| 资助项目 | Backbone Talents Project of Wuhan Botanical Garden, CAS[Y655301M01] ; Sino-Africa Joint Research Center, CAS[SAJC201614] |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000565393500001 |
| 出版者 | WILEY |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/15638]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Hu, Guang-Wan |
| 作者单位 | 1.Natl Museums Kenya, East African Herbarium, POB 45166-00100, Nairobi, Kenya 2.Chinese Acad Sci, Key Lab Plant Germplasm Enhancement & Specialty A, Wuhan Bot Garden, Wuhan 430074, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Sino Africa Joint Res Ctr, Wuhan 430074, Peoples R China 5.Tanzania Forest Serv TFS Agcy, POB 40832, Dar Es Salaam, Tanzania |
| 推荐引用方式 GB/T 7714 | Kyalo, Cornelius M.,Chen, Ling-Yun,Lema, Mathias,et al. Multiple Pleistocene refugia and recent diversification for Streptocarpus ionanthus (Gesneriaceae) complex: Insights from multiple molecular sources[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2020:16. |
| APA | Kyalo, Cornelius M.,Chen, Ling-Yun,Lema, Mathias,Malombe, Itambo,Hu, Guang-Wan,&Wang, Qing-Feng.(2020).Multiple Pleistocene refugia and recent diversification for Streptocarpus ionanthus (Gesneriaceae) complex: Insights from multiple molecular sources.JOURNAL OF SYSTEMATICS AND EVOLUTION,16. |
| MLA | Kyalo, Cornelius M.,et al."Multiple Pleistocene refugia and recent diversification for Streptocarpus ionanthus (Gesneriaceae) complex: Insights from multiple molecular sources".JOURNAL OF SYSTEMATICS AND EVOLUTION (2020):16. |
入库方式： OAI收割
来源：武汉植物园
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