抄録
The family relationships among a sample of members drawn from a particular generation of populations or species play a central role in describing the genealogical behaviour of generations of individuals. Such a genealogical approach is certainly interesting and important in its own right, but it is also very useful to produce a wide variety of classical results in the mathematical theory of population genetics. The power and elegance of the theory rely on 'equivalence' or 'exchangeability' among individuals in a population and have been best demonstrated in single-locus multiple-allele systems. Here I would like to introduce the basic idea of the theory and some results of its application to molecular taxonomy.
