On the Uniqueness of the Selection Criterion in Neighbor-Joining

  • Authors:
  • David Bryant

  • Affiliations:
  • McGill University, Montreal, Canada

  • Venue:
  • Journal of Classification
  • Year:
  • 2005

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Abstract

The Neighbor-Joining (NJ) method of Saitou and Nei is the most widely useddistance based method in phylogenetic analysis. Central to the method is the selectioncriterion, the formula used to choose which pair of objects to amalgamate next. Herewe analyze the NJ selection criterion using an axiomatic approach. We show that anyselection criterion that is linear, permutation equivariant, statistically consistent and basedsolely on distance data will give the same trees as those created by NJ.