Phylogenetic relationships in tribe Lepidieae (Brassicaceae) based on chloroplast DNA restriction site variation

2000 ◽  
Vol 77 (10) ◽  
pp. 1504-1512
Author(s):  
Karsten Zunk ◽  
Klaus Mummenhoff ◽  
Herbert Hurka
Keyword(s):  
Chloroplast Dna ◽  
Phylogenetic Relationships ◽  
Restriction Site ◽  
Cladistic Analysis ◽  
Distribution Patterns ◽  
Morphological Characters ◽  
Classification Systems ◽  
Restriction Site Variation ◽  
Site Variation ◽  
Phylogenetic Lineages

Tribal and subtribal boundaries within the Brassicaceae are often artificially drawn. Most of the currently recognized tribes and subtribes are separated by only a few morphological characters. Furthermore, these characters are variable even within genera, or they conflict with one another in their distribution patterns, resulting in controversial classification systems. Therefore, tribes and subtribes as traditionally delimited may not reflect natural groups. Up to now no cladistic analysis has been performed in tribe Lepidieae. In the current study, we have analyzed restriction site variation of chloroplast DNA among 41 species representing 19 genera to get insights into phylogenetic relationships within the Lepidieae. Phylogenetic lineages derived from our chloroplast data were critically compared with the traditional concepts. Our chloroplast DNA phylogeny most easily supports the classification of genera in the system of Hayek with some modifications.

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

Phylogeny of North American Festuca (Poaceae) and related genera using chloroplast DNA restriction site variation

1992 ◽  
Vol 70 (12) ◽  
pp. 2415-2429 ◽  
Author(s):  
S. J. Darbyshire ◽  
S. I. Warwick
Keyword(s):  
Chloroplast Dna ◽  
Restriction Site ◽  
Cladistic Analysis ◽  
Sensu Stricto ◽  
Classification Systems ◽  
The Other ◽  
Restriction Endonuclease Site ◽  
Monophyletic Cluster ◽  
Site Variation ◽  
Dna Restriction

Phylogenetic relationships in the genus Festuca, as expressed in recent classification systems, were tested using chloroplast DNA restriction endonuclease site variation data. Species native or introduced to North America were used as exemplars for taxa related to Festuca that have been recognized variously as genera, subgenera, and (or) sections. Cladistic analysis of 67 shared chloroplast DNA restriction site mutations indicated that Festuca and some related taxa, as circumscribed in morphologically based classifications, appear to be non-monophyletic. Cluster analysis of 108 polymorphic sites was largely congruent with the results of the cladistic analysis. Two main evolutionary lines were indicated. One contained the majority of the genus Festuca exemplars, including the subgenera Drymanthele, Subulatae, Subuliflorae, Obtusae, and Festuca, as well as Vulpia, Argillochloa, and subg. Leucopoa sect. Breviaristatae. The other lineage included subgenus Schedonorus, subg. Leucopoa sect. Leucopoa, and the genus Lolium. Analyses supported the recognition of two genera in each lineage: Vulpia and Festuca in one, and Leucopoa sensu stricto (including only sect. Leucopoa) and Lolium (including Festuca subg. Schedonorus) in the other. The recognition of the monotypic generic segregate Argillochloa (= F. dasyclada) was not supported by the analyses. Key words: Festuca, Leucopoa, Lolium, Vulpia, phylogeny, chloroplast DNA.

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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