简介：AneuploidyembryosofPinctadamartensiiDunkerareproducedduringtetraploidinductionbyinhibitingthefirstpolarbodyineggsfromtriploidfertilizedwithhaploidspermswithcytochalasinBtreatment.Chromosomeanalysisrevealsthatthereare88.18±6.79%aneuploidyembryos,and28.70%aneuploidsinpearloystersofone-yearageTheseaneuploidshavefivechromosomalconditions,suchas2n+1(29),2n+2(30),3n-2(40),3n-1(41)and3n+1(43).Resultsofgrowthmeasurementshowthatthereisnosignificantdifferencebetweenaneuploids(asagroup)anddiploidsinbodysizeandweight(p＞0.10),buttheaneuploideisobviouslydifferentfromtriploid(p＜0.01).Themeanbodysizeandweightofaneuploidsindiploidcondition(2n±1and2n±2)aresignificantlysmallerthanthoseofdiploids(p＜0.01),butaneuploidswithintriploidcondition(3n±1and3n±2)arenotsmallerthandiploidsinbodysizeandweight(p＞0.1).ThisstudyindicatesPinctadamartensiiDunkercouldtolerateaneuploidyby7～14%ofthehaploidgenome,andthataneuploidsofthisspeciesareviableundercertainconditions.