ACTA AGRICULTURAE BOREALI-SINICA ›› 2013, Vol. 28 ›› Issue (6): 11-17. doi: 10.7668/hbnxb.2013.06.003

Special Issue: Rice

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Mapping of QTLs foR GRain Weight Using ChRomosome Single Segment Substitution Lines in Rice

WANG Jun1,2, ZHOU Yong2, YANG Jie1, ZHU Jin-yan1, FAN Fang-jun1, LI Wen-qi1, LIANG Guo-hua2, ZHONG Wei-gong1   

  1. 1 Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing Branch of Chinese National Center for Rice Improvement, Nanjing 210014, China;
    2 Jiangsu Key Laboratory of Crop Genetics and Physiology, Key Laboratory of Plant Function Genomics, Ministry of Education, Yangzhou University, Yangzhou 225009, China
  • Received:2013-07-20 Published:2013-12-28

Abstract: Grain weight is one of major factors determining rice yield, which is a typical quantitative trait con-trolled by multiple genes.With Guangluai 4 as recipient and Nipponbare as donor, a population of 119 chromosome segment substitution lines had been developed.Correlation analysis between grain weight and grain shape by SPSS revealed that 1000-grain weight was significantly and positively correlated with grain length and length -width ratio, while showed no correlation with grain width and thickness.The QTL analysis of grain weight was carried out using one-way analysis of variance and Dunnett's test.Nineteen stable QTLs for grain weight were identified over two years.All 19 QTLs were identified on all chromosomes except for chromosome 10 and 12 with a significant level of P≤0.001.Among them,10 QTLs had a positive effect and derived from the Nipponbare allele, the additive effect of these QTLs ranged from 0.49 g to 2.74 g,the additive effect percentages ranged from 2.00%to 11.05%.Addition-al 9 QTLs had a negative effect and were all derived from Guangluai 4 alleles,the additive effect of these QTLs ranged from 0.60 g to 2.35 g,the additive effect percentages ranged from 2.40%to 9.84%.The results provide a basis for the fine mapping and gene cloning of novel locus associated with rice grain weight.

Key words: Rice, ChRomosome single segment substitution lines, Quantitative tRait loci, 1000-gRain weight

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Cite this article

WANG Jun, ZHOU Yong, YANG Jie, ZHU Jin-yan, FAN Fang-jun, LI Wen-qi, LIANG Guo-hua, ZHONG Wei-gong. Mapping of QTLs foR GRain Weight Using ChRomosome Single Segment Substitution Lines in Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(6): 11-17. doi: 10.7668/hbnxb.2013.06.003.

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