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Phenetic and phylogenetic studies based on measurements of Plantago ser. Brasilienses
Author(s) -
Rahn Knud
Publication year - 1983
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.1983.tb01944.x
Subject(s) - biology , cladistics , taxon , numerical taxonomy , phylogenetic tree , taxonomy (biology) , similarity (geometry) , botany , artificial intelligence , genetics , computer science , gene , image (mathematics)
Numerical taxonomic methods for a programmable pocket calculator are proposed. Operational taxonomic units (OTU's) may be either accepted taxa or single specimens, or a mixture of both. All types of characters are employable. A calculated or estimated common standard deviation and the mean (or reading) define the normal distribution curve for each measurement variable. Similarity between two OTU's is calculated as the overlapping area below their distribution curves. Ninety specimens of Plantago ser. Brasilienses are used as examples. The clusters are finally grouped using both phenetic and several cladistic methods. Results from phylogenetic sys–tematics cannot be used directly in taxonomy because the basic principles are discordant with those in the botanical code.