Tests of the accuracy of cladograms in Gilia (Polemoniaceae) and some other angiosperm genera |
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Authors: | V Grant |
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Institution: | (1) Section of Integrative Biology, University of Texas, Austin, Texas, USA, US |
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Abstract: | This paper deals with the use of cladistic methods and cladograms in phylogeny reconstruction in plant groups containing
numerous taxa. How accurate are the cladograms as to details? Accuracy tests at the level of details require an independently
known phylogeny, which excludes most plant groups, but such tests can be carried out in domesticated and experimental plant
groups which have documented pedigrees. Four such tests are known and are presented here: a new case in Gilia and three previously published cases in Avena, Hordeum, and Helianthus. The four cases include domesticated and experimental plants, use of morphological and molecular evidence, and presence of
dichotomous as well as reticulate phylogenies. The cladograms of the four plant groups all differ in significant details from
the known pedigrees. These results are discussed in relation to problems of interpretation of cladograms.
Received March 21, 2000 Accepted August 16, 2001 |
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Keywords: | : Cladistics phylogeny Gilia Avena Hordeum Helianthus |
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