CAJ | 학술논문

对从国际水稻核心种质库中引进的315份水稻品种的5个穗部性状进行了全基因组关联分析，发现穗长和一次枝粳数受环境影响大，而粒长、粒宽和籽粒长宽比在不同环境下的变化较小.检测到与穗长、一次枝粳数、粒长、粒宽和籽粒长宽比显著关联的标记区域分别有7、5、10、8和6个，其中，粒型相关的11个区域和一次枝粳数相关的1个区域在两个环境中均被检测到.各品种携带的增效等位变异的个数与性状表型值呈显著线性相关.在所有关联位点中，香稻亚群(ARO)和热带粳稻(TRJ)亚群品种平均携带的增效等位变异数最多，最少的为温带粳稻(TEJ)亚群品种；我国水稻品种在其中6个关联位点上主要携带减效等位变异.筛选到具有30个以上增效等位变异的15份水稻种质，均属于 TRJ 亚群，来自11个不同国家.TRJ 亚群品种在我国水稻高产、稳产育种中具有较高的应用价值，并讨论了利用 TRJ 亚群品种改良我国水稻穗部性状的方法.
대종국제수도핵심충질고중인진적315빈수도품충적5개수부성상진행료전기인조관련분석，발현수장화일차지갱수수배경영향대，이립장、립관화자립장관비재불동배경하적변화교소.검측도여수장、일차지갱수、립장、립관화자립장관비현저관련적표기구역분별유7、5、10、8화6개，기중，립형상관적11개구역화일차지갱수상관적1개구역재량개배경중균피검측도.각품충휴대적증효등위변이적개수여성상표형치정현저선성상관.재소유관련위점중，향도아군(ARO)화열대갱도(TRJ)아군품충평균휴대적증효등위변이수최다，최소적위온대갱도(TEJ)아군품충；아국수도품충재기중6개관련위점상주요휴대감효등위변이.사선도구유30개이상증효등위변이적15빈수도충질，균속우 TRJ 아군，래자11개불동국가.TRJ 아군품충재아국수도고산、은산육충중구유교고적응용개치，병토론료이용 TRJ 아군품충개량아국수도수부성상적방법.
Genome-wide association study (GWAS ) on five panicle traits of 3 1 5 rice accessions introduced from international rice micro-core germplasm bank was conducted.The panicle length (PL)and the primary rachis branch number (PBN)exhibited significant difference between the two plant locations,while grain length (GL),grain width (GW)and grain length to width ratio (GLWR)were not,indicating that PL and PBN are sensitive to environments. Totally 7,5 ,10,8 and 6 chromosome regions or SNP (single nucleotide polymorphism)marker loci were significantly associated with PL,PBN,GL,GW and GLWR,respectively.Among them,eleven regions associated with grain shape and one region controlling PBN were consistence in two environments.Significant linear correlation was found between the average trait value and the number of favorable alleles carried by the cultivars in all associational loci.Among all associational loci,the cultivars in Aromatic (ARO )and tropical japonica (TRJ )sub-populations owned most favorable alleles,but those in temperate japonica (TEJ)sub-population contained the least.The domestic varieties mainly harbored unfavorable alleles in 6 of associational loci detected.Totally 1 5 varieties from 1 1 different countries harbored more than 30 favorable alleles,which were fallen in TRJ sub-population,demonstrating that the cultivars in TRJ sub-population have high potential in rice breeding for high and stable yield.Based on these results,we discussed the approach to improve domestic rice panicle traits by using TRJ varieties.