Identification of quantitative trait loci for seed storability in rice (Oryza sativa L.) |
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| Authors: | Y Xue S Q Zhang Q H Yao R H Peng A S Xiong X Li W M Zhu Y Y Zhu D S Zha |
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| Institution: | (1) Shanghai Key Laboratory of Agricultural Genetic Breeding, Biotech Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China;(2) Suzhou Polytechnic Institute of Agriculture, Suzhou, Jiangsu Province, 215008, China;(3) Shanghai Key Laboratory of Facility Horticulture, Horticultural Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China |
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| Abstract: | In the present study, quantitative trait loci (QTLs) controlling seed storability based on relative germination rate (%) were
dissected using a saturated linkage map and a recombinant inbred lines (RILs) derived from a cross of japonica cultivar Asominori (Oryza sativa L.) and indica cultivar IR24 (Oryza sativa L.). A total of three QTLs (qRGR-1, qRGR-3 and qRGR-9) were detected on chromosomes 1, 3 and 9 with LOD score ranging from 3.45 to 6.95 and the phenotypic variance explained from
16.72% to 28.63%. The IR24 alleles were all associated with seed storability at all the three QTLs. The existence of these
QTLs was confirmed using IR24 chromosome segment substitution lines (CSSLs) in Asominori genetic background (AIS). By QTL
comparative analysis, the QTL, qRGR-9 on chromosomes 9 appeared to be consistent with another rice population, this region may provide an important region for
isolating this responsible gene. These results also provide the possibilities of enhancing Seed storability in rice breeding
program by marker-assisted selection (MAS) and pyramiding QTLs.
Y. Xue and S. Q. Zhang—joint first authors. |
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| Keywords: | Chromosome segment substitution lines (CSSLs) QTL analysis Recombinant inbred lines (RILs) Rice (Oryza sativa L ) Seed storability |
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