01568naa a2200229 a 450000100080000000500110000800800410001910000230006024500960008326000090017930000230018852008210021165000270103265000250105965000350108465000130111965300160113270000220114870000170117070000130118777301380120013252092009-08-19       2004    bl uuuu     u00u1 u    #d1 aRISSO-PASCOTTO, C.  aAsynchronous meiosis in an interspecific hybrid of Brachiaria ruziziensis and B. brizantha.  c2004  ap. 1246c1 CD-ROM.  aMale meiosis is generally synchronous in higher plants. The regulation of cell cycle is still not well understood. Mutations affecting cell cycle synchrony are powerful tools to understand such regulation. Studies of cell cycle progression and cell division patterns have been widely developed during mitosis, but little studies explored meiosis. A spontaneous asynchronous microsporogenesis was detected in an interspecific hybrid between Brachiaria ruziziensis and B. brizantha. The female parental is one artificially tetraploidized sexual accession of B. ruziziensis (2n=4x=36), and the male parental is B. brizantha (cv. Marandu), (2n=4x=36), the most widely natural tetraploid apomictic cultivar planted in Brazilian pastures. The hybrid was produced by Embrapa Beef Cattle and is under agronomical evaluation.  aBrachiaria Ruziziensis  aGramínea Forrageira  aMelhoramento Genético Vegetal  aPastagem  aBraquiária1 aPAGLIARINI, M. S.1 aVALLE, C. B.1 aJANK, L.  tIn: CONGRESSO BRASILEIRO DE GENÉTICA, 50., 2004, Florianópolis. Resumos... Florianópolis: Sociedade Brasileira de Genética, 2004.