CIRCUMSCRIPTION AND PHYLOGENY OF THE ORTHOTRICHALES (BRYOPSIDA) INFERRED FROM RBCL SEQUENCE ANALYSES

Citation
B. Goffinet et al., CIRCUMSCRIPTION AND PHYLOGENY OF THE ORTHOTRICHALES (BRYOPSIDA) INFERRED FROM RBCL SEQUENCE ANALYSES, American journal of botany, 85(9), 1998, pp. 1324-1337
Citations number
105
Language
INGLESE
art.tipo
Review
Categorie Soggetti
Plant Sciences
Journal title
ISSN journal
0002-9122
Volume
85
Issue
9
Year of publication
1998
Pages
1324 - 1337
Database
ISI
SICI code
0002-9122(1998)85:9<1324:CAPOTO>2.0.ZU;2-L
Abstract
The affinities as well as the circumscription of the Orthotrichaceae ( Bryopsida), one of the most diverse families of mosses, have been the focus of a controversy for much of the last century. We obtained rbcL sequences for 37 arthrodontous mosses, including 27 taxa of the Orthot richales. The sequences were analyzed using maximum parsimony and neig hbor joining in order to (1) test the monophyly of the Orthotrichales and the Orthotrichaceae; (2) determine their phylogenetic relationship s; and (3) test the current subfamilial classification within the Orth otrichaceae. Both analyses suggest that the Orthotrichales are polyphy letic. The Erpodiaceae and the Rhachitheciaceae as well as Amphidium a nd Drummondia, two genera of the Orthotrichaceae, are shown to be of h aplolepideous affinity. The Splachnales, the Bryales sensu late, and t he Orthotrichales form a monophyletic clade sister to the Haplolepidea e. Both neighbor joining and maximum parsimony also suggest that the O rthotrichaceae are composed of two major lineages dominated either by acrocarpous or cladocarpous taxa. The monophyly of the family is, howe ver, only well supported by Tamura's distances. The genera Macrocoma, Macromitrium, Orthotrichum, Ulota, and Zygodon all appear to be artifi cial assemblages. This study illustrates the contribution of rbcL sequ ence data to bryophyte systematics and, particularly, in determining t he affinities of taxa lacking a peristome, whose characters are centra l to the classification of mosses.