Degree Type
Dissertation
Date of Award
2003
Degree Name
Doctor of Philosophy
Department
Botany
First Advisor
Lynn G. Clark
Second Advisor
Robert S. Wallace
Abstract
Phylogenetic analysis of plastid encoded ndhF coding sequences for the Chenopodiaceae-Amaranthaceae alliance reveals a monophyletic Chenopodiaceae-Amaranthaceae clade sister to Achatocarpaceae. The Chenopodiaceae-Amaranthaceae-Achatocarpaceae clade is in turn sister to the Caryophyllaceae, the Chenopodiaceae-Amaranthaceae-Achatocarpaceae-Caryophyllaceae clade forming a separate lineage within order Caryophyllales. The Chenopodiaceae as currently circumscribed is paraphyletic and the alliance breaks into a polytomy of four major clades: (i) Amaranthaceae-Polycnemoideae, (ii) Chenopodieae-Atripliceae, (iii) SalicornioideaeSalsoloideae, and (iv) Beteae. Character-state optimizations of morphological characters mapped onto ndhF sequence derived phylogenies reveal phylogenetically significant patterns of character-state distribution. Morphological investigations also revealed a previously undetected branching pattern in the Gomphrenoideae, which is here described, illustrated, and discussed. Morphological analyses of Amaranthus led to the discovery of a previously undescribed species, which is here described and illustrated and its morphological affinities discussed.
DOI
https://doi.org/10.31274/rtd-180813-11233
Publisher
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu
Copyright Owner
Donald B. Pratt
Copyright Date
2003
Language
en
Proquest ID
AAI3085939
File Format
application/pdf
File Size
116 pages
Recommended Citation
Pratt, Donald B., "Phylogeny and morphological evolution of the Chenopodiaceae-Amaranthaceae alliance " (2003). Retrospective Theses and Dissertations. 613.
https://lib.dr.iastate.edu/rtd/613
