@ARTICLE{TreeBASE2Ref29524, author = {Siqi Liang and Ronald L. L. Viane and Xian-Chun Zhang and Ran Wei}, title = {Exploring the reticulate evolution in the Asplenium pekinense complex and the A. varians complex (Aspleniaceae)}, year = {2019}, keywords = {Ferns; Asplenium; Reticulate evolution; Polyploidy; 2C DNA content; pgiC}, doi = {}, url = {http://}, pmid = {}, journal = {Journal of Systematics and Evolution}, volume = {}, number = {}, pages = {}, abstract = {The Asplenium pekinense complex, mainly comprises the diploid A. sarelii (rare), autotetraploid A. pekinense (best known and very common), and shares two allotetraploids, A. anogrammoides (common but often misidentified) and A. altajense (rare and endemic) with the A. varians complex. The latter is further constituted by the diploid A. tenuicaule (widespread), as well as other three tetraploids, A. kansuense (barely known), A. varians (well-known, relatively common, and morphologically variable) and A. kukkonenii (rare and often misidentified). These two species complexes are notorious for the taxonomic difficulty, which is mainly caused by the morphological similarity of taxa within them. Here, we collected each species within the two complexes, and obtained ploidy information by spore size measurement and flow cytometry investigation. Phylogenetic analyses using DNA markers representing maternally inherited chloroplast and biparentally inherited nuclear genomes helped to reconstruct a reticulate evolutionary history. The present results support previous hypotheses that A. sarelii is the ancestor of both A. pekinense and A. anogrammoides, as well as that A. tenuicaule is the common progenitor of A. anogrammoides, A. varians and A. kukkonenii. We also unraveled the autotetraploid origin of A. kansuense from A. tenuicaule for the first time, and showed that A. altajense shares essentially identical genomes with A. anogrammoides.} }

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