甘薯抗旱QTL的鉴定与候选基因分析

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中图分类号：S531 文献标识码：A 文章编号： 1000-4440（2026）03-0485-07

Abstract：Drought is oneof the mostsevere abiotic stresss limiting crop production.Dissectingthe genetic basis of droughtresistanceandidentifying keygenesand molecular markersareofgreat significance forbreeding drought-resistant swetpotato varieties.Inthis study，anFpopulationconsisting of212 progenies wasusedasexperimental material forthe identificationofdrought-resistantphenotypesunderthearidenvironmentinXinjiang.Basedontheswetpotatosingle nucleotide polymorphism（SNP）genetic map，the composite interval mapping （CIM）methodwasadoptedto detectone quantitative traitlocus（QTL）qDRO4-1associatedwithdroughtresistance inswetpotato，witha phenotypiccontributionrate of 11.1% .Further gene predictionand functional annotation were performed on the confidence interval of qDRO4- I ，and ten drought-resistant candidate genes werescreenedout，whose functions were involved in stressadaptation pathwayssuch asion transport，lipid metabolism，glycosylation modification，oxidative stress responseand WRKY transcriptionalregulation.This studyisthefirsttomapthedrought-resistant QTLsinswetpotatoandsystematicallyidentifyitscandidategenes，which providesa theoretical basis for the dissectionof drought-resistant molecular mechanismsand molecular breeding.

收稿日期：2025-07-09

基金项目：国家重点研发计划项目（2023YFD1202703）；国家现代农业产业技术体系项目（CARS-10-GW01）；江苏省重点研发计划项目（BE2021384）；国家科技资源共享服务平台项目（NCGRC-43）

作者简介：赵冬兰（1972-），女，陕西泾阳人，硕士，研究员，主要从事甘薯种质资源研究。（剩余12134字）