Abstract
There are four available primate genome sequences as of 2008 A.D.; human, chimpanzee, orangutan, and rhesus macaque. Species phylogeny of representative primate lineages were already determined by former studies using much smaller scale sequence data. For example, now we know that chimpanzees are the most closest organism to human, followed by gorilla. However, species divergence times are still controversial. This is partly because molecular data can only give relative proportions of each branch of a phylogenetic tree. Yet there are still some inconsistency among various molecular data. As genomic sequences of many primate species will become available, it will become possible to estimate pattern of introgression between closely related species.
