01770nam a2200289 a 450000100080000000500110000800800410001902000180006010000220007824501010010026001180020130000160031950001060033552008330044165000160127465000090129065000100129965000120130965000350132165000170135665000130137365300190138665300160140565300160142170000220143770000210145912055852024-07-08       1998    bl uuuu     u00u1 u    #d  a971-22-0115-51 aGUIMARÃES, E. P.  aDeveloping hybrid rice in Brazilbmethodology, highlights, and prospects.h[electronic resource]  aIn: VIRMANI, S. S.; SIDDIQ, E. A.; MURALIDHARAN, K. (ed.). Advances in hybrid rice technology. Manila: IRRIc1998  ap. 379-387.  aProceedings of the 3rd International Symposium on Hybrid Rice, 14-16 November 1996, Hyderabad, India.  aEMBRAPA-CNPAF began to explore the prospects for and problems of hybrid rice in 1984 via two areas: the introduction of allogamic traits to develop A and B lines and reciprocal recurrent selection. The methodological steps involve identifying maintainer and restorer lines, introducing allogamic traits into maintainer lines, and transferring the cytoplasmic genetic male sterility system to derived F 4 maintainer lines. Development of line 0461 with allogamic traits and good agronomic behavior and several hybrids is the most significant result. Future plans are directed toward developing an economically viable methodology to produce hybrid seeds, locating partners in the private sector, identifying new cytoplasm sources to produce genetically diverse A lines, and evaluating the economic need to use the allogamic traits  amethodology  arice  aArroz  aHibrido  aMelhoramento Genético Vegetal  aOryza Sativa  aPesquisa  aArroz híbrido  aHybrid rice  aMetodologia1 aCUTRIM, V. dos A.1 aMENDONÇA, J. A.