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HAGSTRÖM'S CONCEPT OF PHYLOGENETIC RELATIONSHIPS IN POTAMOGETON L. (POTAMOGETONACEAE)
Author(s) -
Les Donald H.,
Sheridan Donna J.
Publication year - 1990
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.2307/1223179
Subject(s) - cladistics , phylogenetic tree , biology , numerical taxonomy , context (archaeology) , evolutionary biology , genus , taxonomy (biology) , hierarchy , phylogenetics , tree (set theory) , zoology , mathematics , paleontology , combinatorics , genetics , gene , economics , market economy
Summary Hagström's concepts of relationships in Potamogeton , as reflected by the subgeneric, sectional, and subsectional divisions in his classification of the genus are investigated by reconstruction of an evolutionary “tree” deduced from phylogenetic inferences stated in his monograph. These relationships are explored in the context of results from phenetic and cladistic numerical analyses performed using characters taken from the Hagström monograph that are scored for 26 subsections. The Hagström classification represents an amalgam of phenetic and cladistic interpretations and the hierarchy does not depict accurately fundamental evolutionary relationships indicated by numerical analyses. Recommendations are provided for developing and testing evolutionary hypotheses that are independent of relationships inferred by this long‐standing but problematic classification.