Author:
Chao Yi-Shan,Ebihara Atsushi,Chiou Wen-Liang,Tsai Jer-Min,Huang Yu-Wen,Ranker Tom A.
Abstract
AbstractThe Pteris fauriei group (Pteridaceae) has a wide distribution in Eastern Asia and includes 18 species with similar but varied morphology. We collected more than 300 specimens of the P. fauriei group and determined ploidy by flow cytometry and inferred phylogenies by molecular analyses of chloroplast and nuclear DNA markers. Our results reveal a complicated reticulate evolution, consisting of seven parental taxa and 58 hybrids. The large number of hybrid taxa have added significant morphological complexity to the group leading to difficult taxonomic issues. The hybrids generally had broader ranges and more populations than their parental taxa. Genetic combination of different pairs of parental species created divergent phenotypes of hybrids, exhibited by both morphological characteristics and ecological fidelities. Niche novelty could facilitate hybrid speciation. Apogamy is common in this group and potentially contributes to the sustainability of the whole group. We propose that frequent hybridizations among members of the P. fauriei group generate and maintain genetic diversity, via novel genetic combinations, niche differentiation, and apogamy.
Funder
Ministry of Science and Technology, Taiwan
the Kaohsiung Medical University Research Foundation
Publisher
Springer Science and Business Media LLC
Reference118 articles.
1. Nolte, A. W. & Tautz, D. Understanding the onset of hybrid speciation. Trends Genet. 26, 54–58 (2010).
2. Martin, C. H. The cryptic origins of evolutionary novelty: 1000-fold faster trophic diversification rates without increased ecological opportunity or hybrid swarm. Evolution 70, 2504–2519 (2016).
3. Seehausen, O. Hybridization and adaptive radiation. Trends Ecol. Evol. 19, 198–207. https://doi.org/10.1016/j.tree.2004.01.003 (2004).
4. Haufler, C. H. Species and speciation. In The Biology and Evolution of Ferns and Lycophytes (eds T. A. Ranker & C. H. Haufler) Ch. 12, 303–331 (Cambridge University Press, 2008).
5. Haufler, C. H. Species concepts and speciation in pteridophytes. In Pteridology in Perspective (eds J. M. Camus, M. Gibby, & R. J. Johns) 291–305 (Royal Botanic Gardens, Kew, 1996).
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