Pollen Characteristics and Genetics of Induced and Spontaneous Genetic Male-Sterile Mutants in Rice |
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| Authors: | Jinguo Hu J. N. Rutger |
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| Affiliation: | Department of Vegetable Crops, University of California, Davis, CA 95616, U.S.A. (corresponding author);US Department of Agriculture, Agricultural Research Service, Mid South Area, P.O. Box 225, Stoneville, Mississippi, 38776, U.S.A |
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| Abstract: | Pollen characteristics, inheritance and allelism of 23 genetic male-sterile (ms) mutants of rice (Oryza sativa L.) were investigated. Ten of the mutants were induced by ethyl methane sulfonate, one induced by ethyleneimine, seven induced by gamma rays, one induced by streptomycin, one derived from tissue culture and three were spontaneous mutants found in the field. Four pollen abortion types were observed among these ms mutants: 3 no-pollen (NP) type, 6 complete pollen abortion (CPA) type, 13 partial pollen abortion (PPA) type, and 1 stainable pollen abortion (SPA) type. Progeny tests over two years indicated that each of the mutants was inherited as a monogenic recessive. A partial diallel cross among the 23 ms mutants indicated that mutant E2 was allelic to G4, E5 was allelic to E9, N2 was allelic to N3, and that three other mutants, E3, G6 and T1, shared the same ms locus. Gene symbols ms-46 (t) through ms-63 (t) were assigned to these mutants. |
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| Keywords: | Oryza sativa induced mutants genetic male sterility pollen abortion type inheritance allelism |
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