沈阳农业大学学报2025，Vol.56Issue(3)：23-32,10.DOI:10.3969/j.issn.1000-1700.2025.03.003
东北粳稻穗部性状全基因组关联分析
Genome-Wide Association Study of Panicle Traits in Japonica Rice from Northeast China
摘要
Abstract
[Objective]Rice(Oryza sativa L.)panicle traits are critical agronomic determinants of yield,and elucidating their genetic mechanisms is essential to address global food security challenges.This study aims to identify key genetic loci and functional genes regulating panicle morphology in japonica rice,providing theoretical support for high-yield breeding.[Methods]Using 410 japonica rice accessions from Northeast China,we systematically measured panicle morphological and structural traits,including panicle length,primary/secondary branch numbers,and conducted genome-wide association study(GWAS)to locate significant loci.Candidate gene functions were validated through haplotype analysis and PARMS marker-based genotyping.[Results]A total of 7 significant QTL(qPW2,qGNP3,qPW6/qTGW6,qPL8,qPBN8/qTGW8,qPL9 and qTGW9)sites were identified,and 10 candidate genes including GW6a and DEP1 were screened.Haplotype analysis revealed significant divergence in panicle weight and grain weight traits among GW6a haplotypes,while DEP1 haplotypes exhibited highly significant differences in panicle length.Molecular marker-based genotyping confirmed the superior allelic variants of GW6a and DEP1.[Conclusion]This study demonstrates significant genetic associations between GW6a/DEP1 allelic variations and panicle weight/length traits.The PARMS marker-based genotyping system enables efficient screening of favorable panicle-related alleles.These findings provide validated genetic targets for molecular design breeding of panicle architecture in Northeast japonica rice.Multi-gene polymerization strategies can optimize panicle structure and advance high-yield smart breeding technologies.关键词
水稻/种质资源/穗部性状/全基因组关联分析Key words
rice/germplasm resources/panicle traits/genome-wide association study分类
农业科学引用本文复制引用
陈宏伟,商文奇,吕桂兰,马秀芳,王铮,王先俱,马作斌..东北粳稻穗部性状全基因组关联分析[J].沈阳农业大学学报,2025,56(3):23-32,10.基金项目
国家重点研发计划项目(2024YFD1201004-04) （2024YFD1201004-04）
辽宁省"种质创新藏粮于技"重大专项项目(2023JH1/10200009-01-3) （2023JH1/10200009-01-3）
辽宁省农业科学院院长基金博士启动项目(2025BS1715) （2025BS1715）
