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1、棉花学报CottonScience2015袁27渊4冤院372―378安阳棉蚜寄主专化型及其形成机制初步分析*王丽袁张帅袁雒珺瑜袁吕丽敏袁王春义袁崔金杰(中国农业科学院棉花研究所/棉花生物学国家重点实验室袁河南安阳455000冤摘要院为了解安阳地区棉蚜寄主专化型情况袁进行了棉蚜不同寄主转接的适合度测定遥结果显示袁棉花上与黄瓜上的棉蚜相互转接后其存活率及繁殖力均明显下降袁不能建立种群曰棉花上的棉蚜转接到西葫芦上时袁其存活率及繁殖力与其原寄主无显著差异曰黄瓜上的棉蚜转接到西葫芦上时袁其净增殖率及内禀增长率均显著地高于其原寄主曰黄瓜
2、上棉蚜对西葫芦的适应性比棉花上棉蚜强遥表明安阳地区棉蚜存在黄瓜和棉花两种寄主专化型袁且都可以利用西葫芦遥进一步对3种植物苗期叶片游离氨基酸进行测定袁结果显示袁游离氨基酸种类及总量均在西葫芦中最多袁棉花中次之袁黄瓜中最少遥寄主植物游离氨基酸种类及含量的多少会影响棉蚜的生长与繁殖袁可能是棉蚜寄主专化型形成的影响因素之一遥关键词院棉蚜曰寄主专化型曰存活率曰繁殖力曰内禀增长率曰游离氨基酸中图分类号院S435.622文献标志码院A文章编号院1002-7807(2015冤04-0372-0710.11963/issn.1002-7807.
3、201504010*WangLi,ZhangShuai,LuoJunyu,L俟Limin,WangChunyi,CuiJinjie(455000,)TobetterunderstandcottonaphidhostbiotypesinAnyangregionofChina,weassessedcottonaphidfitnessupontransplantationtodifferenthostplants.Resultsshowedthatthesurvivalandfecundityofcottonaphiddecline
4、ddramaticallyandpopulationcouldnotbeestablishedwhenthehostplantsofcottonaphidwereexchanged.Therewerenosignificantdifferencesinaphidnetreproductiverate,intrinsicrateofincreaseandaveragegenerationtimewhentransferredtozucchinileaveswhencomparedwiththeoriginalcottonleav
5、es,whilenetreproductiverateandintrinsicrateofincreaseonzucchinileaveswerehigherthanthehostcucumberleaves.However,aphidsfromcucumberplantshadgreaterfitnesswhentransplantedtozucchinileavesthanthosefromcottonplants,theintrinsicrateofincreasewas0.41fortheaphidstransplan
6、tedfromcucumberplantsand0.34fortheaphidstransplantedfromcottonplants.Inaddition,freeaminoacidsincotton,cucumberandzucchinileavesweredeterminedattheseedlingstage.Aminoacidtypesandtotalfreeaminoacidcontentweremostabundantinzucchini,followedbycotton,thencucumber.Thesed
7、atasuggestthattherearetwobiotypesinAnyangregion,acottonbiotypeandacucumberbiotype,yetbothcansurviveonzucchiniplants.Furthermore,freeaminoacidtypesandcontentmayaffectgrowthandreproductionofcottonaphid,thuspromotinghostbiotypeformation.;hostbiotype;survivalrate;fecund
8、ity;intrinsicrateofincrease;freeaminoacid棉蚜(Glover)是一种世界性的亡遥同时由于其个体小袁繁殖速度快袁极易扩散并害虫袁在我国袁棉蚜已成为棉花尧瓜类及多种观赏能传播多种植物病毒病袁给农业生产带来重大损[1]植物上的重要害虫遥棉蚜靠
