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　　Thebookintroducesfishdistanthybridization，whichcoversthebasictheoryandapplicationsoffishdistanthybridizationaswellasthemainbiologicalcharacteristicsofdifferentploidyfishattheindividual，tissue，cell，andmolecularlevel.《BR》Itisdividedinto12Chapters.Theresearchprogressesofanimaldistanthybridizationandpolyploidsindomesticandoverseasaresummarizedinthisbook.Thecharacteristicsofthesehybridsandpolyploidfisharealsoillustratedonbasisofconsideringfactorsofthechromosomesnumbers，phylogeneticrelationship，reproduction，appearance，feedinghabits，growthrate，andstressresistance.《BR》Thecreationoffishdistanthybridizationlineageswillprovideacleargeneticbackgroundwhichishelpfixlforthestudyofthestraingenerationasamodelingeneticvariationcharacteristicsandreproductivecharacteristics.Fullyillustratedincolor，thisbookprovidesuniqueideasinsystemdescriptionandpresentationofdistanthybridizationandpolyploidyfish.Infishgeneticbreeding，thetetraploidfishlineageanddiploidfishlineage，formedthroughdistanthybridization，canbeusedforpreparinglarge-scaletriploidanddiploidfish.