Did maize domestication and early spread mediate the population genetics of corn leafhopper?

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摘要 Investigatinghowcropdomesticationandearlyfarmingmediatedcropattributes,distributions,andinteractionswithantagonistsmayshedlightontoday'sagriculturalpestproblems.Cropdomesticationgenerallyinvolvedartificialselectionfortraitsdesirabletoearlyfarmers,forexample,increasedproductivityoryield,andenhancedqualities,thoughinvariablyitalteredtheinteractionsbetweencropsandinsects,andexpandedthegeographicalrangesofcrops.Thus,somestudiessuggestthatwithcropdomesticationandspread,insectpopulationsonwildcropancestorsgaverisetopestiferousinsectpopulationsoncrops.Here,weaddressedwhethertheemergenceofcornleafhopper(Dalbulusmaidis)asanagriculturalpestmaybeassociatedwithdomesticationandearlyspreadofmaize(Zeamaysmays).WeusedAFLPmarkersandmitochondrialCOIsequencestoassesspopulationgeneticstructuringandhaplotyperelationshipsamongcornleafhoppersamplesfrommaizeanditswildrelativeZeadiploperennisfrommultiplelocationsinMexicoandArgentina.Weuncoveredsevencornleafhopperhaplotypescontainedwithintwohaplogroups,onehaplogroupcontaininghaplotypesassociatedwithmaizeandtheothercontaininghaplotypesassociatedwithZ.diploperennisinamountainoushabitat.Withinthefirsthaplogroup,onehaplotypewaspredominantacrossMexicanlocations,andanotheracrossArgentineanlocations;bothwereconsideredpestiferous.Wesuggestedthatthedivergencetimesofthemaize-associatedhaplogroupandofthe"pestiferous"haplotypesarecorrelatedwiththechronologyofmaizespreadfollowingitsdomestication.Overall,ourresultssupportahypothesispositingthatmaizedomesticationfavoredcornleafhoppergenotypespreadaptedforexploitingmaizesothattheybecamepestiferous,andthatwiththegeographicalexpansionofmaizefarming,cornleafhoppercolonizedZ.diploperennis,ahostexclusivetosecludedhabitatsthatservesasarefugeforarchaiccornleafhoppergenotypicdiversity.B
机构地区 不详
出处 《昆虫科学:英文版》 2019年3期
出版日期 2019年03月13日(中国期刊网平台首次上网日期,不代表论文的发表时间)
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