THE FUTURE OF PHYLOGENY RECONSTRUCTION

A new approach to phylogenetic analysis, parsimony jackknifing, uses s imple parsimony calculations combined with resampling of characters to arrive at a tree comprising well-supported groups. This is usually mu ch the same as the consensus of most-parsimonious trees found from ext ensive multiple-tree calculations, but the new method is thousands of times faster, allowing analysis of much larger data matrices, and also provides information on the strength of support for different groups. Jackknife frequencies provide a more reliable assessment of support t han do alternative methods, notably ''confidence probability'' (CP) an d T-PTP testing. (C) 1998 The Norwegian Academy of Science and Letters .