Hexaploidy

Complete asynapsis resulting in 2n pollen formation in Paspalum jesuiticum Parodi (Poaceae)

R. A. Bernardo Filho, Santos, A. C. C., Souza, F. H. D., Valls, J. F. M., and Pagliarini, M. S., Complete asynapsis resulting in 2n pollen formation in Paspalum jesuiticum Parodi (Poaceae), vol. 13, pp. 255-261, 2014.

Cytological 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.

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