Abstract

ANDRADA, Aldo R.; PAEZ, Valeria de los A.; MARIA, I. Toranzo  and  BIGLIARDO, Graciela E. Ruíz de. Analysis of meiosis and pollen viability in intraspecific morphotypes of Cuscuta parodiana (Cuscutaceae). Lilloa [online]. 2018, vol.55, n.1, pp.1-10. ISSN 0075-9481.  http://dx.doi.org/D.O.I.:doi.org/10.30550/j.M/2018.55.1/1.

In family Cuscutaceae the Cuscuta genus comprises holo-parasitic plants that have cosmopolitan distribution. The genus includes three subgenera: Cuscuta, Monogyna and Grammica; the last one is widely distributed in the American continent. In this work, flower morphology, meiotic studies and pollen viability of 4 natural populations of Cuscuta parodiana subgenus Grammica are presented. The flower morphology allow us to differentiate 4 morphotypes through corolla and gynoecium traits. Three entities analyzed were tetraploids (n = 30], and one was of them diploid (n = 15). Trivalent and tetravalent chromosomal configurations, chromatin bridges, chromosomes outside of metaphasic plate, cytomixis and extranuclear spherical bodies were observed during meiosis.

Keywords : Cuscuta parodiana, morfotipos, poliploidía, viabilidad de polen.

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