| Allopolyploid Speciation Accompanied by Gene Flow in a Tree Fern | |
| Wang, Jing1; Dong, Shiyong1; Yang, Lihua1; Harris, Aj2; Schneider, Harald3; Kang, Ming1 | |
| 2020 | |
| Source Publication | MOLECULAR BIOLOGY AND EVOLUTION
 |
| ISSN | 0737-4038 |
| Volume | 37Issue:9Pages:2487-2502 |
| Abstract | Hybridization in plants may result in hybrid speciation or introgression and, thus, is now widely understood to be an important mechanism of species diversity on an evolutionary timescale. Hybridization is particularly common in ferns, as is polyploidy, which often results from hybrid crosses. Nevertheless, hybrid speciation as an evolutionary process in fern lineages remains poorly understood. Here, we employ flow cytometry, phylogeny, genomewide single nucleotide polymorphism data sets, and admixture and coalescent modeling to show that the scaly tree fern, Gymnosphaera metteniana is a naturally occurring allotetraploid species derived from hybridization between the diploids, G. denticulata and G. gigantea. Moreover, we detected ongoing gene flow between the hybrid species and its progenitors, and we found that G. gigantea and G. metteniana inhabit distinct niches, whereas climatic niches of G. denticulata and G. metteniana largely overlap. Taken together, these results suggest that either some degree of intrinsic genetic isolation between the hybrid species and its parental progenitors or ecological isolation over short distances may be playing an important role in the evolution of reproductive barriers. Historical climate change may have facilitated the origin of G. metteniana, with the timing of hybridization coinciding with a period of intensification of the East Asian monsoon during the Pliocene and Pleistocene periods in southern China. Our study of allotetraploid G. metteniana represents the first genomic-level documentation of hybrid speciation in scaly tree ferns and, thus, provides a new perspective on evolution in the lineage. |
| Keyword | POLYPLOID SPECIATION RETICULATE EVOLUTION POPULATION-STRUCTURE STATISTICAL-METHOD MULTIPLE ORIGINS HOMOSPOROUS FERN GENOME SIZE HYBRIDIZATION ALSOPHILA ASPLENIUM |
| Subject Area | Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity |
| DOI | 10.1093/molbev/msaa097 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000574386500004 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/11812 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.Chinese Acad Sci, Key Lab Plant Resources Conservat & Sustainable U, South China Bot Garden, Guangzhou, Peoples R China 2.Chinese Acad Sci, Ctr Conservat Biol, Core Bot Gardens, Guangzhou, Peoples R China 3.Oberlin Coll, Dept Biol, Oberlin, OH 44074 USA 4.Chinese Acad Sci, Ctr Integrat Conservat, Xishuangbanna Trop Bot Garden, Menglun, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Jing,Dong, Shiyong,Yang, Lihua,et al. Allopolyploid Speciation Accompanied by Gene Flow in a Tree Fern[J]. MOLECULAR BIOLOGY AND EVOLUTION,2020,37(9):2487-2502. |
| APA | Wang, Jing,Dong, Shiyong,Yang, Lihua,Harris, Aj,Schneider, Harald,&Kang, Ming.(2020).Allopolyploid Speciation Accompanied by Gene Flow in a Tree Fern.MOLECULAR BIOLOGY AND EVOLUTION,37(9),2487-2502. |
| MLA | Wang, Jing,et al."Allopolyploid Speciation Accompanied by Gene Flow in a Tree Fern".MOLECULAR BIOLOGY AND EVOLUTION 37.9(2020):2487-2502. |
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| Allopolyploid Specia（813KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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