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Karine Cristina Krycki, Marília Tedesco, Vitória Rodrigues, Roberto Luis Weiler, André Pich Brunes, Miguel Dall’Agnol and Carine Simioni

Abstract: Paspalum notatum is an important forage native to Southern Brazil
and one of the most promising fodder species in terms of productivity, quality,
resistance and growth speed. The objective of this study was to evaluate the
reproductive mode and fertility of hybrid progenies resulting from artificial
crosses among artificially duplicated sexual plants, selected intraspecific hybrids
of the UFRGS breeding program and apomictic ecotypes of the species. The
resulting F1 progenies were represented by 24 plants with high pollen viability
(varying from 82.15 to 99.67%) and 1.2:1 segregation for the sexual: apomictic
reproduction mode, indicating predominantly sexual hybrids, due to distorted
segregation. In the apomictic plants, most chromosomes paired as bivalents
in diakinesis. Since the low presence of abnormalities observed in the meiotic
chromosome pairing and the high pollen viability of the hybrids, all plants were
confirmed as promising parents for future crosses.

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