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5歲女童遭16歲少年虐打致死上身赤裸被拋竹林

時間：2025-05-14 07:33:58 來源：網絡整理編輯：休閑

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Nearly90pctofdomesticyakshavegeneticstructuralvariantsfromcattle:research_GuangmingOnlineLANZHOU,Sep

Nearly90pctofdomesticyakshavegeneticstructuralvariantsfromcattle:research_GuangmingOnlineLANZHOU,Sept.21(Xinhua)--ArecentresearchconductedbyChinesescientistshasfoundthatapproximately90percentofdomesticyaksexhibitfixedgeneticintrogressionofallelicstructuralvariationsderivedfromcattle.Thishybridizedintrogressionhasledtotheemergenceofanewphenotypeknownasthewhiteyak,whichischaracterizedbynovelgeneticmutationsfromsuchanintrogression."Approximately7,300yearsago,theinhabitantsoftheQinghai-TibetPlateausuccessfullydomesticatedwildyaks,markingtheoriginsofdomesticyaks,"saidLiuJianquan,aprofessorattheCollegeofEcology,LanzhouUniversity.Accordingtotheexpert,around4,000yearsago,humansdomesticatedwildaurochsinIndiaandtheFertileCrescent,whichsubsequentlygaverisetocattle.ThesecattlewerelaterintroducedtotheQinghai-TibetPlateau.Liu'sresearchteam,incollaborationwithexpertssuchasYanPing,aresearcherattheLanzhouInstituteofHusbandryandPharmaceuticalSciencesoftheChineseAcademyofAgriculturalSciences,collectedmaterialsfromvariousyakbreeds,aswellaswildyaksandotherrelatedspecies,overaspanofthreedecades.Thisextensivecollectionfacilitatedtheircomprehensivestudy.Thestudyrevealedthatnearly90percentofdomesticyakspossessgenomicstructuralvariationsthatarespecifictocattle.TheintroductionofcattletotheQinghai-TibetPlateaubyhumansresultedinhybridizationbetweendomesticyaksandcattle.Thecolor-sidedyaksacquiredcorrespondingvariantsfromcolor-sidedcattle,leadingtothedevelopmentofnewmutationsresponsiblefortheemergenceofwhiteyaks.TheresearchfindingswerepublishedonSept.19inNatureCommunications,aninternationalacademicjournal.Editor:DisclaimerTheviewsandopinionsexpressedinthisarticlearethoseoftheauthor's,GMW.cnmakesnorepresentationsastoaccuracy,suitability,orvalidityofanyinformationonthissiteandwillnotbeliableforanyerrors,omissions,ordelaysinthisinformation.

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