Identification of Mutants for Abnormal Pollen Development in Rice

  • Yamagata Yoshiyuki
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University
  • Doi Kazuyuki
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University
  • Yasui Hideshi
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University
  • Yoshimura Atsushi
    Plant Breeding Laboratory, Faculty of Agriculture, Kyushu University

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To gain a comprehensive understanding of the genetic regulation of male gametogenesis, we screened and identified mutants for abnormal pollen development in rice (Oryza sativa L.). We gamma-irradiated spikelets of a japonica rice cultivar, Taichung 65, just before and after anthesis. Among 1,000 M2 lines, 24 lines were identified as mutants for pollen sterility. Progeny tests in M3 demonstrated that pollen sterility in 12 lines was controlled by single recessive genes, designated sps1sps12 (sporophytic pollen sterility). In the remaining 12 lines, pollen semi-sterility was under the control of gametophytic genes, designated gps1gps12 (gametophytic pollen sterility). Linkage analysis revealed that sps6, sps9, and sps12 were mapped on chromosomes 3, 9, and 7, respectively.<br>

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