Phylogenetic relationships of subtribe Ecliptinae (Asteraceae: Heliantheae) based on chloroplast DNA restriction site data

1999 ◽  
Vol 86 (3) ◽  
pp. 413-427 ◽  
Author(s):  
Jose L. Panero ◽  
Robert K. Jansen ◽  
Jennifer A. Clevinger
Keyword(s):  
Chloroplast Dna ◽  
Phylogenetic Relationships ◽  
Restriction Site ◽  
Dna Restriction

scholarly journals Phylogenetic relationships in the Crassulaceae inferred from chloroplast DNA restriction-site variation

1998 ◽  
Vol 85 (1) ◽  
pp. 123-134 ◽  
Author(s):  
Roeland C. H. J. Van Ham ◽  
Henk ’t Hart
Keyword(s):  
Chloroplast Dna ◽  
Phylogenetic Relationships ◽  
Restriction Site ◽  
Restriction Site Variation ◽  
Site Variation ◽  
Dna Restriction

Phylogenetic relationships and infraspecific variation in Canadian Arctic Poa based on chloroplast DNA restriction site data

2001 ◽  
Vol 79 (6) ◽  
pp. 679-701 ◽  
Author(s):  
Lynn J Gillespie ◽  
Ruben Boles
Keyword(s):  
Chloroplast Dna ◽  
Phylogenetic Relationships ◽  
Restriction Site ◽  
Canadian Arctic ◽  
Classification Systems ◽  
Infraspecific Variation ◽  
Site Analysis ◽  
Restriction Site Analysis ◽  
Infraspecific Taxa ◽  
Dna Restriction

Infraspecific variation and phylogenetic relationships of Canadian Arctic species of the genus Poa were studied based on chloroplast DNA (cpDNA) variation. Restriction site analysis of polymerase chain reaction amplified cpDNA was used to reexamine the status of infraspecific taxa, reconstruct phylogenetic relationships, and reexamine previous classification systems and hypotheses of relationships. Infraspecific variation was detected in three species, but only in Poa hartzii Gand. did it correspond to infraspecific taxa where recognition of subspecies ammophila at the species level is supported. Additional variation in P. hartzii ssp. hartzii is hypothesized to be the result of hybridization with Poa glauca in the High Arctic and subsequent introgression resulting in repeated transfer of P. glauca DNA. The variation in Poa pratensis L. had a geographical rather than taxonomic basis, and is hypothesized to correspond to indigenous arctic versus introduced extra-arctic populations. In P. glauca Vahl cpDNA variation was detected only in western Low Arctic and boreal populations and may represent greater variation where the species survived the Pleistocene glaciations. Cladistic parsimony analysis of cpDNA restriction site data mostly confirms recent infrageneric classification systems. Poa alpina L., along with the non-arctic Poa annua L. and Poa sect. Sylvestres, formed the basalmost clades. The remaining taxa group into two main clades: one consisting of Poa sects. Poa, Homalopoa, Madropoa and Diocopoa; the second, of Poa sects. Secundae, Pandemos, Abbreviatae and Stenopoa. Poa sect. Poa, comprising Poa arctica R. Br. and P. pratensis, is a strongly supported monophyletic group, not closely related to P. alpina. Poa hartzii is confirmed as a member of a paraphyletic or weakly supported P. sect. Secundae. Poa glauca and Poa abbreviata R. Br. are distinct members within a generally unresolved Poa. sect. Stenopoa-Abbreviatae complexKey words: Poa, Canadian arctic, chloroplast DNA, restriction site analysis, infraspecific variation, phylogeny.

Phylogenetic relationships and patterns of character change in the tribe Lactuceae (Asteraceae) based on chloroplast DNA restriction site variation

1995 ◽  
Vol 73 (7) ◽  
pp. 1058-1073 ◽  
Author(s):  
Jeannette Whitton ◽  
Robert S. Wallace ◽  
Robert K. Jansen
Keyword(s):  
Phylogenetic Tree ◽  
Chloroplast Dna ◽  
Key Words ◽  
Chloroplast Genome ◽  
Phylogenetic Relationships ◽  
Restriction Site ◽  
Restriction Site Variation ◽  
Site Variation ◽  
Dna Restriction ◽  
Rapid Diversification

The Lactuceae is perhaps the most easily recognizable tribe in the Asteraceae, distinguished by the presence of milky latex and of ligulate florets in the inflorescence. Three existing taxonomic treatments of the tribe establish subtribal classifications but fail to resolve relationships among major lineages. Our study of chloroplast DNA restriction site variation sampled 60 Lactuceae taxa. We detected 1268 mutations, 612 of which are phylogenetically informative. Despite the large amount of variation detected, little resolution of relationships among major lineages was obtained from parsimony analyses, although the monophyly of many groups is strongly supported. These results, when considered along with data from morphological analyses of other workers, suggest that rapid diversification played an important role in early stages of the tribe's evolution. Our examination of character change further reveals that as noted by other workers, restriction site variation is not evenly distributed across the chloroplast genome and that regions with higher levels of variation do not necessarily have higher amounts of homoplasy. This is somewhat surprising, since we found that amounts of homoplasy along terminal branches of our phylogenetic tree are related to levels of divergence. Key words: Asteraceae, chloroplast DNA, homoplasy, Lactuceae, phylogeny, restriction site variation.

Subfamilial Phylogenetic Relationships of the Bromeliaceae: Evidence from Chloroplast DNA Restriction Site Variation

1990 ◽  
Vol 15 (3) ◽  
pp. 425 ◽  
Author(s):  
Thomas A. Ranker ◽  
Douglas E. Soltis ◽  
Pamela S. Soltis ◽  
Amy Jean Gilmartin
Keyword(s):  
Chloroplast Dna ◽  
Phylogenetic Relationships ◽  
Restriction Site ◽  
Restriction Site Variation ◽  
Site Variation ◽  
Dna Restriction
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