title: Phylogenetic inference rejects sporophyte based classification of the Funariaceae (Bryophyta): rapid radiation suggests rampant homoplasy in sporophyte evolution.
abstract: The moss family Funariaceae, which includes the model systems Funaria hygrometrica and Physcomitrella patens, comprises 15 genera, of which three accommodate approximately 95% of the 250-400 species. Generic concepts are drawn primarily from patterns in the diversity of morphological complexity of the sporophyte. Phylogenetic inferences from ten loci sampled across the three genomic compartments yield a hypothesis that is incompatible with the current circumscription of two of the speciose genera of the Funariaceae. The single clade, comprising exemplars of Funaria with a compound annulus, is congruent with the systematic concept proposed by Fife (1985). By contrast, Entosthodon and Physcomitrium are resolved as polyphyletic entities, and even the three species of Physcomitrella are confirmed to have diverged from distinct ancestors. Although the backbone relationships within the core clade of the Funariaceae remain unresolved, the polyphyly of these genera withstands alternative hypothesis testing. Consequently, the sporophytic characters that define these lineages are clearly homoplasious suggesting that selective pressures (or their relaxation) are in fact driving the diversification rather than the conservation of sporophytic architecture in the Funariaceae.
authors.affiliation: Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269, USA.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Jessica M
authors.initials: JM
authors.lastname: Budke
authors.forename: Bernard
authors.initials: B
authors.lastname: Goffinet
mesh_terms: D001499:Bayes Theorem; D019068:Bryopsida / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics*; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D019143:Evolution, Molecular; D061125:Genes, Chloroplast; D017343:Genes, Plant; D014644:Genetic Variation; D016013:Likelihood Functions; D010802:Phylogeny; D035261:Plant Components, Aerial / Q000033:anatomy & histology; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA
chemical_list: D021903:DNA, Ribosomal Spacer