Show simple item record

dc.contributor.authorWickell, David A.
dc.contributor.authorWindham, Michael D.
dc.contributor.authorWang, Xiaofei
dc.contributor.authorMacdonald, Stuart J.
dc.contributor.authorBeck, James B.
dc.identifier.citationWickell, David A.; Windham, Michael D.; Wang, Xiaofei; Macdonald, Stuart J.; Beck, James B. 2017. Can asexuality confer a short-term advantage? Investigating apparent biogeographic success in the apomictic triploid fern Myriopteris gracilis. American Journal of Botany, vol. 104:no. 8:pp 1254–1265en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractPREMISE OF THE STUDY: Although asexual taxa are generally seen as evolutionary dead ends, asexuality appears to provide a short-term benefit in some taxa, including a wider geographic distribution compared to sexual relatives. However, this may be an illusion created by multiple, morphologically cryptic, asexual lineages, each occupying a relatively small area. In this study we investigate the role of multiple lineages in the biogeography of Myriopteris gracilis Fee (Pteridaceae), a North American apomictic triploid fern species with a particularly large range. METHODS: Range-wide asexuality was assessed by counting spores/sporangium in 606 Myriopteris gracilis specimens from across the species range, and lineage structure was assessed with both plastid DNA sequence and Genotyping By Sequencing (GBS) SNP datasets. KEY RESULTS: Spore counting of >600 specimens identified no sexual populations, establishing that Myriopteris gracilis is exclusively asexual. The plastid data estimated the crown age of M. gracilis at ca. 2.5 mya and identified two lineages, each largely confined to the eastern or western portions of the range. These groups were further subdivided by the GBS data, revealing at least seven asexual lineages of varying geographic distributions, each occupying a relatively small portion of the total range of M. gracilis. CONCLUSIONS: Although maintained exclusively through asexual reproduction, the broad distribution of Myriopteris gracilis is a compilation of numerous, independently formed asexual lineages. Since no single asexual lineage occupies the full extent of the species distribution, recurrent lineage formation should be considered when evaluating the short-term benefit of asexuality in this taxon and others.en_US
dc.description.sponsorshipWichita State University Department of Biological Sciences, an Institutional Development Award (IDeA) from the National Institute of General Medical Sciences (P20 GM103418) from the National Institutes of Health, and by grants from the Kansas Academy of Science and the American Society of Plant Taxonomists. Research reported in this study was made possible in part by the services of the University of Kansas Genome Sequencing Core Laboratory. This laboratory is supported by the National Institute of General Medical Sciences (NIGMS) of the National Institutes of Health under award number P20GM103638.en_US
dc.publisherBotanical Society of Americaen_US
dc.relation.ispartofseriesAmerican Journal of Botany;v.104:no.8
dc.subjectAsexual reproductionen_US
dc.subjectDopp-Manton sporogenesisen_US
dc.subjectGenotyping by sequencingen_US
dc.subjectGeographic parthenogenesisen_US
dc.subjectPipeline for Untangling Reticulate Complexesen_US
dc.subjecttrnG-trnR intergenic spaceren_US
dc.titleCan asexuality confer a short-term advantage? Investigating apparent biogeographic success in the apomictic triploid fern Myriopteris gracilisen_US
dc.rights.holder© 2017 Botanical Society of Americaen_US

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record