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Identification of QTLs for agronomic traits in indica rice using an RIL population

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Abstract

Increasing grain weight and breeding for ideal plant architecture are two means to improve the productivity of rice. Quantitative trait locus (QTL) mapping was conducted on ten yield component traits using a recombinant inbred line population derived from an indica × indica cross (M201 × JY293). Correlation analysis revealed that plant height, panicle length and flag leaf length, classified as plant morphology traits, were positively correlated with grain shape traits such as thousand-grain weight, grain length and grain width. Two tillering traits, total and effective tiller numbers, showed negative correlations with nearly all the other traits tested. A total of 37 QTLs were detected over the 2-year study period, and 14 of them were identified in both years. Four clustered QTLs corresponding to known genes/QTLs (GW2, GS3, qGL3 and qTGW3.3) were revealed on chromosomes 2 and 3, which had pleiotropic effects on grain weight and plant architecture traits. QTL mapping demonstrated that qGL3 was a major QTL controlling grain length and weight, as well as plant height, panicle length and flag leaf length in rice. Three new QTLs, qTGW3.0, qGL2.2 and qETN4, were detected in both years and worth attention in breeding for high-yield rice varieties.

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Acknowledgments

This work was financially supported by the Special Fund for Agro-scientific Research in the Public Interest (201103007) from the Ministry of Agriculture and by the Fundamental Research Funds for the Central Universities (2011FZA6011).

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Authors declare no conflict of interest on the contents of the manuscript.

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Authors and Affiliations

  1. Institute of Nuclear Agricultural Sciences, College of Agriculture and Biotechnology, Zhejiang University, Huajiachi Campus, Hangzhou, 310029, China

    Feifei Xu, Yan Huang & Jinsong Bao

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  1. Feifei Xu
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  2. Yan Huang
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  3. Jinsong Bao
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Correspondence to Jinsong Bao.

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Xu, F., Huang, Y. & Bao, J. Identification of QTLs for agronomic traits in indica rice using an RIL population. Genes Genom 37, 809–817 (2015). https://doi.org/10.1007/s13258-015-0312-3

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  • DOI: https://doi.org/10.1007/s13258-015-0312-3

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