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《Acta Agriculturae Boreali-Sinica》 2013-03
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Mapping QTL Associated with Grain Number of Rice

PAN Ying-hua1,2,YU Jian-ping1,ZHANG Qiang3,XIONG Hai-yan1,ZHU Ru-cai2,LI Zi-chao1(1.Key Laboratory of Crop Genomics and Genetic Improvement,Ministry of Agriculture,Beijing Key Laboratory of Crop Genetic Improvement,China Agricultural University,Beijing 100193,China; 2.Rice Research Institute,Guangxi Academy of Agricultural Sciences,Nanning 530005,China; 3.Rice Research Institute,Jilin Academy of Agricultural Sciences,Gongzhuling 136100,China)  
A F2 population from Nipponbare and B0801(a big-ear variety with more spikelets and grains) was used in the study,and 11 QTLs associated with grain number,spike length and grain density were detected,which distributed on the chromosome 1,2,5,7,9 respectively.The LOD value was 2.03-31.88,and the contribution rate of phenotype ranged from 0.21% to 68.20%.4 QTLs were associated with grain number,distributing on the chromosome 1,2,7 and 9,respectively,with the LOD value 2.11-4.00 and the genotype contribution rate 0.21%-25.06%.4 QTLs about spikelet length were mapped on chromosome 1,2,5,9 the LOD value being 2.03-31.88 and the genotype contribution 0.28%-61.19%.Among them,qPL9-1 had the LOD value of 31.88 and contribution rate of 68.19%,which should be a major QTL.Besides,3 QTLs about grain density were located on chromosome 1,2,9 the LOD value being 2.15-2.64 and the phenotype contribution rate being 0.43%-6.91%.The effect-raising allele qSD1-1 came from B0801,the acting mode of which was additive.
【Fund】: 广西自然科学基金项目(桂科青0991053);; 广西农科院基本科研业务专项(200923);; 广西农科院面上项目(2007027);; 广西自然科学基金项目(桂科青0933001z;桂科青0832001z);; 广西农科院院基金项目(200901Z)
【CateGory Index】: S511
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