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Mapping QTLs influencing rice floral morphology using recombinant inbred lines derived from a cross between Oryza sativa L. and Oryza rufipogon Griff

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An Erratum to this article was published on 12 June 2003

Abstract.

To understand the genetic basis of floral traits associated with the mating system in rice, we analyzed pistil, stamen and glume traits using a recombinant inbred line population, derived from a cross between an Asian cultivated rice (Oryza sativa L.), Pei-kuh, and a wild rice (Oryza rufipogon Griff.), W1944. Quantitative trait loci (QTLs) affecting floral morphology were detected by composite interval mapping using a linkage map constructed using 147 markers, mostly RFLPs. A total of 7, 4, 14 and 6 QTLs were detected for traits related to pistil, stamen, and size and shape of the glume, respectively. Comparison of 31 QTLs affecting these organs revealed ten QTLs affecting the different organs in four adjacent regions on chromosomes 2, 4, 5 and 10, but most QTLs (68%) were located separately on the whole chromosomes. Although four QTLs for stigma breadth, anther length and thickness of lemma and palea explained more than 25% of the total phenotypic variance, most QTLs (87%) had smaller effects. These results suggest that quantitative variation observed for pistil, stamen and glume traits is controlled by several distinct genes with small effects.

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Acknowledgements.

We thank Dr. F. Kikuchi for his critical review of the manuscript. We also thank the staff of the Agricultural and Forestry Research Center at the University of Tsukuba for their administrative support.

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Author notes

  1. Y. Uga

    Present address: Department of Molecular Genetics, National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan

Authors and Affiliations

  1. Institute of Agricultural and Forest Engineering, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan

    Y. Uga & T. Fujimura

  2. International Rice Research Institute, DAPO Box 7777, Metro Manila, The Philippines

    Y. Fukuta

  3. Japan Grassland Farming and Forage Seed Association Forage Crop Research Institute, 388-5, Higashiakada, Nishinasuno, Tochigi 329-2742, Japan

    H. W. Cai

  4. Department of Information Science and Technology, National Agricultural Research Center, National Agricultural Research Organization, 3-1-1 Kannondai, Tsukuba, Ibaraki 305-8666, Japan

    H. Iwata

  5. Tokyo University of Agriculture, 1737 Funako, Atsugi 243-0034, Japan

    H. Morishima

  6. Institute of Agriculture and Forestry, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan

    R. Ohsawa

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  1. Y. Uga
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Correspondence to Y. Uga.

Additional information

Communicated by D.B. Neale

An erratum to this article is available at http://dx.doi.org/10.1007/s00122-003-1336-7.

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Uga, Y., Fukuta, Y., Cai, H.W. et al. Mapping QTLs influencing rice floral morphology using recombinant inbred lines derived from a cross between Oryza sativa L. and Oryza rufipogon Griff. Theor Appl Genet 107, 218–226 (2003). https://doi.org/10.1007/s00122-003-1227-y

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  • DOI: https://doi.org/10.1007/s00122-003-1227-y

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