Homoploid hybridization in Central European Diphasiastrum (Lycopodiaceae).
(English)Manuscript (Other academic)
Three species of homoploid hybrid origin are commonly recognized among Central European Diphasiastrum, and reticulate evolutionary events have for a long time been acknowledged as an important factor contributing to the species count in the genus. Presented evidence obtained from molecular data has until recently been scarce and inconclusive. Recent studies have, however, documented reticulate phylogenetic patterns involving all putative parental combinations reported from Central Europe. Reciprocal crosses involving the same parental combinations have also been confirmed. In order to further explore these putative reticulate events, admixture analyses using a Bayesian approach as implemented in the program NewHybrids are conducted on an expanded dataset obtained from six Central European populations from where putative hybrid taxa are reported. A majority of the accessions included in the analyses were inferred to represent pure bred D. alpinum, D. complanatum, D. tristachyum, F1 hybrids, F2 hybrids or backcrosses with one of the parent species. Accessions displaying ambiguous classification were found in both allopatric parent populations as well as in Central European hybrid populations. Presented results indicate the presence of frequently occurring hybrid zones with first and second generation hybrids as well as backcrosses.
admixture analysis, Bayesian clustering, Diphasiastrum, homoploid hybridization, Lycopodiaceae, Lycopodium, NewHybrids.
Research subject Systematic Botany; Population Biology
IdentifiersURN: urn:nbn:se:uu:diva-99579OAI: oai:DiVA.org:uu-99579DiVA: diva2:208222