Introgression lines of rice (Oryza sativa L.) carrying a donor genome from the wild species, O. glumaepatula Steud. and O. meridionalis Ng

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  • Yoshimura Atsushi
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University
  • Nagayama Hiroshi
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University
  • Sobrizal
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University Present address: National Nuclear Energy Agency, Center for the Application of Isotopes and Radiation Technology
  • Kurakazu Toshio
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University
  • Sanchez Paulino L.
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University
  • Doi Kazuyuki
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University Present address: Graduate School of Bioagricultural Sciences, Nagoya University
  • Yamagata Yoshiyuki
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University
  • Yasui Hideshi
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University

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To broaden the available rice genetic resources, we developed two populations of introgression lines of cultivated rice (Oryza sativa) carrying donor segments from the wild species Oryza glumaepatula and Oryza meridionalis. These lines contain overlapped introgressed donor segments that covered most parts of the genome of the two donors in the same of O. sativa genetic background (ssp. japonica, cv. Taichung 65). The introgression lines were developed through repeated backcrossing with Taichung 65 as a pollen parent and marker assisted selection. O. glumaepatula introgression lines consist of two sets of the lines (with O. glumaepatula and Taichung 65 cytoplasm, respectively): these comprise a total of 69 lines that cover 79.5 to 89.2% of the Oryza glumaepatula genome. The O. meridionalis introgression lines also consist of two sets of the lines (with O. meridionalis and Taichung 65 cytoplasm, respectively): these comprise a total of 78 lines covering the 81.5 to 98.0% of the Oryza meridionalis genome. These introgression lines significantly broaden rice genetic resources, and will facilitate analyses of the genetics of traits specific to the donor species.<br>

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