01672naa a2200241 a 450000100080000000500110000800800410001902200140006010000260007424501200010026000090022052009610022965000150119065000320120565000120123765000120124965000150126170000210127670000230129770000200132070000220134077300680136219949212023-03-13       2014    bl uuuu     u00u1 u    #d  a1676-56801 aBERNARDO FILHO, R. A.  aComplete asynapsis resulting in 2n pollen formation in Paspalum jesuiticum Parodi (Poaceae).h[electronic resource]  c2014  aCytological investigation revealed complete asynapsis during microsporogenesis in 2 wild accessions of Paspalum jesuiticum collected in distinct Brazilian regions. Both accessions were hexaploid (2n = 6x = 60) and 60 univalents could be counted at diakinesis. In this phase, the majority of meiocytes exhibited univalents with both chromatids. After alignment at the metaphase plate, the chromatids segregated to the poles. Only 1 meiotic division (equational) occurred, and after cytokinesis, a dyad with 2n microspores was formed. The genetic constitution of the 2n gametes was equivalent to that of first division restitution (FDR). Since recombination did not occur, 100% transmission of parental heterozygosity could be expected from the FDR 2n gametes. The meiotic behavior of both accessions suggested that they resulted from a recent natural hybridization event. The potential use of the 2n gametes in Paspalum breeding programs has been discussed.  ahexaploidy  ainterspecific hybridization  ameiosis  aPoaceae  apolyploidy1 aSANTOS, A. C. C.1 aSOUZA, F. H. D. de1 aVALLS, J. F. M.1 aPAGLIARINI, M. S.  tGenetics and Molecular Researchgv. 13, n. 1, p. 255-261, 2014.