Journal
BREEDING SCIENCE
Volume 57, Issue 4, Pages 331-337Publisher
JAPANESE SOC BREEDING
DOI: 10.1270/jsbbs.57.331
Keywords
rice (Oryza sativa L.); mutant; pollen sterility; sporophytic; gametophytic; linkage mapping
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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 M-2 lines, 24 lines were identified as mutants for pollen sterility. Progeny tests in M-3 demonstrated that pollen sterility in 12 lines was controlled by single recessive genes, designated spsl-sps12 (sporophytic pollen sterility). In the remaining 12 lines, pollen semi-sterility was under the control of gametophytic genes, designated gps1-gps12 (gametophytic pollen sterility). Linkage analysis revealed that sps6, sps9, and sps12 were mapped on chromosomes 3, 9, and 7, respectively.
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