Analysis of QTL for Seed Dormancy and Their Response to Dry Heat Treatment in Rice (Oryza sativa L.)

作     者：TANGJiu-you JIANGLing ZHANGWen-wei WANGChun-ming LIUShi-jia CHENLiang-ming ZHAIHu-qu AtsushiYoshimura WANJian-min 

作者机构：StateKeyLaboratoryofCropGeneticsandGermplasmEnhancementResearchCenterofJiangsuPlantGeneEngineeringNanjingAgriculturalUniversityNanjing210095P.R.China ChineseAcademyofAgriculturalSciencesBeijing100081P.R.China FacultyofAgricultureKyushuUniversityFukuoka812-8581Japan 

出 版 物：《Agricultural Sciences in China》 (中国农业科学（英文版）)

年 卷 期：2004年第3卷第9期

页      面：641-648页

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by the National Nature Science Foundation of Jiangsu Province,China(BK2003415) Jiangsu Province Tackle Key Problem Foundation(BE2001305) 

主　　题：Rice(Oryza sativa L.) Seed dormancy RI population QTL analysis Dormancy- breaking by dry heat treatment 

摘      要：Quantitative trait loci (QTL) controlling seed dormancy in rice were identified usingrecombinant inbred lines (RILs) population derived from the cross between a japonicavariety Kinmaze and an indica variety DV85. Seeds of two parental cultivars and each RILwere harvested in 35d after heading. The germination percentage of these seeds at 30℃for 7 days were measured as the degree of seed dormancy. QTL analysis was performed withWindows QTL Cartographer 1.13a program by composite interval mapping. A total of four QTLfor seed dormancy were detected on chromosome 2 (two regions), 5 and 11, *** variation explained by each QTL ranged from 8.37 to 17.40%. Responses of suchloci to a dormancy-breaking treatment with dry heat were further detected. The resultsshowed that two alleles of qDOR-2-1 and qDOR-5 from DV85 as well as the allele of qDOR-11 from Kinmaze increased the seed dormancy, which seemed to be easily broken by dry heattreatment. Such loci of seed dormancy may be applied to rice genetic improvement. Theallele of qDOR-2-2 from DV85 increased the seed dormancy, which could not be broken bydry heat treatment.