Canis familiaris are good friends of human beings. Although there are great differences between them, these different canis familiaris groups have a common ancestor, that is, gray wolf. Gray wolves are widely distributed all over the world, but canis familiaris everywhere do not evolve from gray wolves everywhere. Starting with genomic DNA and comparing the genetic diversity of canis familiaris populations from different regions, researchers found that canis familiaris populations from southern East-Asia have the highest diversity. At the same time, the structure of phylogenetic tree also supports the above conclusion. On the phylogenetic tree, the end of each branch represents a population, and the closely related groups will also be closer in the tree, while the domestic dog samples from southern East-Asia are located at the base of the phylogenetic tree.
the purpose of the above words?
The principle of phylogenetic tree provides support for the study of animal evolution.