Abstracts

Diversity of the Fauna

The simplest database of characters consists of 2 linked tables: 1) matrix of taxa/characters (represented by records of subtaxa with fields of characters coded by digits of the character states.) and 2) table of characters and their states (represented by records of characters and their states with fields of character numbers and their states digits. Phylogenetic packages analyze the matrix consisting of the records of subordinated taxa with fields of characters coded according to their advanced grade in the evolution row (starting from the 0-state). Thus, the matrix used by the phylogenetic packages corresponds logically to the first table of the database of characters. For the use of the character database in the phylogenetic modelling it is necessary 1) to transform of the database tables to one matrix, 2) to range the character states according to their advanced grade, with 0-state as the first one for each character states row; 3) evaluation of the characters significant for the parsimony hypotheses; 4) analysis of restrictions caused by the transition : transversion ratio for the taxa under study. Modern phylogenetic analysis is combined. It includes large amount of characters which are not used for the routine taxonomic identification, such as the ecological features (host range, life history type), molecular sequences of the nucleic acids and proteins; these characters imported into matrix additionally and they are also tested for the significance in parsimony analysis. Each character can be evaluated for its diagnostic, phylogenetic and evolution significance for the studied taxon. On examples of nematodes inhabiting Eurasia the use of the databases of characters for the identification and phylogeny analysis is demonstrated.

Note. Abstracts are published in author's edition

|Home Page| |English Part|

Go to Home