Gene Family and Phylogenetic Analysis
To investigate the extent of genetic conservation among teleost fishes,
fifteen vertebrate genomes was compared in this study, includingG. przewalskii, Carassius auratus, Cyprinus carpio,
Ctenopharyngodon idella, Danio rerio, Ictalurus punctatus, Gadus morhua,
Boleophthalmus pectinirostris, Oryzias latipes, Larimichthys crocea,
Tetraodon nigroviridis, Takifugu rubripes, Paralichthys olivaceus,
Oncorhynchus mykiss and Salmo salar. These 15 species data were
preformed to indentify the gene family and the single copy gene number
is 241, the gene number of multiple groups is 9,832, the gene number of
other groups is 16,273, the gene number of unique groups is 593 and the
unclustered gene is 1,400 (Table S8 and Figure 3). The phylogenetic
results showed that the 15 fish clustered into three groups, marine,
freshwater and migratory fish and revealed that G. przewalskiidiverged 24 Mya from its common ancestor with Carassius auratusand Cyprinus carpio , closely relating to Cyprinidae family
(Figure 3).