A Phylogenetic Evaluation of the Ramalina americana Chemotype Complex (Lichenized Ascomycota, Ramalinaceae) Based on rDNA ITS Sequence Data

1999 ◽  
Vol 102 (4) ◽  
pp. 602 ◽  
Author(s):  
Scott LaGreca
Keyword(s):  



2005 ◽  
Vol 30 (3) ◽  
pp. 627-634 ◽  
Author(s):  
Cynthia Gilbert ◽  
John Dempcy ◽  
Constance Ganong ◽  
Robert Patterson ◽  
Greg S. Spicer


2002 ◽  
Vol 230 (3-4) ◽  
pp. 173-187 ◽  
Author(s):  
H. Lantz ◽  
K. Andreasen ◽  
B. Bremer


Plant Biology ◽  
2000 ◽  
Vol 2 (5) ◽  
pp. 571-578 ◽  
Author(s):  
M. P. Martín ◽  
K. Winka ◽  
X. Llimona ◽  
H. T. Lumbsch


2001 ◽  
Vol 33 (2) ◽  
pp. 172-176 ◽  
Author(s):  
Scott LaGreca ◽  
H. Thorsten Lumbsch
Keyword(s):  


2001 ◽  
Vol 58 (2) ◽  
pp. 331-346 ◽  
Author(s):  
K. SPALIK ◽  
A. WOJEWÓDZKA ◽  
S. R. DOWNIE

Of the 455 known genera in Apiaceae (Umbelliferae), 41% are monotypic and 26% comprise only two or three species each. Similarly, of the 16 genera constituting Scandiceae Spreng. subtribe Scandicinae Tausch, seven (Balansaea Boiss. & Reut., Kozlovia Lipsky, Krasnovia Schischk., Myrrhis Mill., Myrrhoides Fabr., Sphallerocarpus DC. and Todaroa Parl.) are monotypic, and two (Neoconopodium Pimenov & Kljuykov and Tinguarra Parl.) are bitypic. Phylogenetic analysis of the subtribe, using molecular (rDNA ITS), morphological and anatomical data, indicates that the number of genera may be reduced with only three, Todaroa, Sphallerocarpus and Myrrhis, retained as monotypic. Remaining taxa form eight clades that are supported by high bootstrap values and are morphologically distinct. Four of these clades (Anthriscus Pers., Geocaryum Coss., Osmorhiza Raf. and Scandix L.) are equivalent to currently recognized genera. Kozlovia, Krasnovia and Neoconopodium form a well-supported clade that may be recognized as the single genus Kozlovia, and Myrrhoides is grouped with Chaerophyllum L. Tinguarra and Athamanta L. form a monophyletic group that is well supported by analyses of morphology, fruit anatomy, and combined morphological, anatomical and ITS sequence data; however, this group is not maintained in separate analyses of ITS sequences. Similarly, the group formed by Conopodium W. D. J. Koch and Balansaea is monophyletic in morphological, anatomical, and combined analyses, but is not supported by the separate analyses of ITS sequence data. All of these groups are well delimited on the basis of fruit characters that have long been regarded as essential in umbellifer taxonomy. One new combination is proposed: Athamanta montana (Webb ex H. Christ.) Spalik, A. Wojew. & S. R. Downie.



1998 ◽  
Vol 11 (1) ◽  
pp. 41 ◽  
Author(s):  
C. Hsiao ◽  
S. W. L. Jacobs ◽  
N. P. Barker ◽  
N. J. Chatterton

Phylogenetic relationships of the whole Poaceae family inferred from the sequence data of rDNA (ITS) support the hypothesis that the arundinoids are monophyletic, not polyphyletic as previously proposed. The ITS sequence phylogeny of 42 arundinoid species demonstrates an early divergence of the Aristideae and three major groupings, corresponding loosely to the tribes Aristideae, Arundineae and Danthonieae. The Arundineae are resolved into two paraphyletic clades. In one clade, Arundo, Monachather, and Dregeochloa are the sister group to Amphipogon and Diplopogon. In the other clade, Phragmites, Molinia, Gynerium, Thysanolaena, Spartochloa, and Cyperochloa are the sister group to Eriachne and Micraira. Arundo is not closely related to Phragmites. The Danthonieae clade, including taxa from Africa, Australia, New Guinea, New Zealand, the South American Cortaderia, and the North American Danthonia, appears to be monophyletic. However, the genus Merxmuellera is polyphyletic.



2000 ◽  
Vol 36 (1) ◽  
pp. 227-236 ◽  
Author(s):  
Geoffrey W. Woolcott ◽  
Masafumi Iima ◽  
Robert J. King
Keyword(s):  


2002 ◽  
Vol 15 (1) ◽  
pp. 49 ◽  
Author(s):  
Dorothy A. Steane ◽  
Dean Nicolle ◽  
Gay E. McKinnon ◽  
René E. Vaillancourt ◽  
Brad M. Potts

This expanded survey of ITS sequences represents the largest analysis of molecular data ever attempted on Eucalyptus. Sequences of the internal transcribed spacer (ITS) region of the nuclear ribosomal DNA were included in an analysis of 90 species of Eucalyptus s.s. and 28 species representing eight other genera (Allosyncarpia, Angophora, Arillastrum, Corymbia, Eucalyptopsis, Stockwellia, Lophostemon and Metrosideros). The results of the study indicate that Angophora and Corymbia form a well-supported clade that is highly differentiated from Eucalyptus s.s. Corymbia species are divided between two clades, one of which may be the sister to Angophora. Allosyncarpia, Arillastrum, Eucalyptopsis and ‘Stockwellia’ are also highly differentiated from Eucalyptus s.s. If the genus Eucalyptus is to be expanded to include Angophora and Corymbia(sensu Brooker 2000), ITS data suggest that Allosyncarpia, Eucalyptopsis, ‘Stockwellia’ and potentially Arillastrum should also be included in Eucalyptus s.l. The ITS data suggest that subg. Symphyomyrtus is paraphyletic and that subg. Minutifructus should be included within it. Within subg.Symphyomyrtus, only sect. Maidenaria appears to be monophyletic. Sections Adnataria and Dumaria are probably monophyletic; sections Exsertaria and Latoangulatae are very close and probably should be combined in a single section. Section Bisectae is polyphyletic and is divided into two distinct lineages. The phylogenetic groups depicted by ITS data are consistent with the frequency of natural inter-specific hybridisations as well as data from controlled crosses within subgenus Symphyomyrtus. The ITS data illustrate that subg. Idiogenes and western Australian monocalypts are early evolutionary lines relative to E. diversifolia, E. rubiginosa (monotypic subg. Primitiva) and the eastern monocalypts and that subg. Primitiva should be sunk into subg. Eucalyptus. Subgenus Eudesmia may be monophyletic, grouping with subgenera Idiogenes and Eucalyptus. Further work is required to confirm the phylogenetic positions of the monotypic subgenera Alveolata, Cruciformes, Acerosae and Cuboidea.



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