Zephyranthes citrina is an ornamental American bulbous plant used as an ornamental garden crop for the aesthetic qualities of its yellow perigonium. The objective of this work was to characterize the species by classical chromosome staining and fluorochrome banding. A sporophytic chromosome number of 2n=8x=48 chromosomes was observed, being the karyotypic formula 20 m + 26 sm + 2 st. Satellites were detected in the short arm of metacentric chromosomes 8, 9, 11 and 12, which colocalized with constitutive heterochromatin CMA+/DAPI-/0 bands. The karyotype comprised chromosome pairs with terminal constitutive heterochromatin bands that included satellites and heteromorphic clusters indicating that it is an allooctoploid. These results will be used as a tool for monitoring genetic improvement, in interspecific crosses and its progenies and in biotechnological procedures by in vitro culture. Key words: constitutive heterochromatin, chromosome banding, bulbous, plant genetic resources, karyotype

J.R. Daviña

A.C. Gianini Aquino

O.A. Rodríguez Mata

E. Tapia-Campos

R. Barba-Gonzalez

A.I. Honfi

Journal of Basic and Applied Genetics

BAG - Journal of Basic and Applied Genetics

CHROMOSOMIC STUDIES IN ZEPHYRANTHES CITRINA BAKER (AMARYLLIDACEAE), A POLYPLOID ORNAMENTAL

风信子属植物Zephyranthes citrina Baker（石蒜科）的多倍体观赏植物染色体研究

CHROMOSOMIC STUDIES IN ZEPHYRANTHES CITRINA BAKER (AMARYLLIDACEAE), A POLYPLOID ORNAMENTAL

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