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

DAVIÑA J. R.; GIANINI AQUINO A.; RODRIGUEZ MATA ORLANDO; TAPIA CAMPOS E.; BARBA GONZALEZ R.; HONFI A. I.

Basic and Applied Genetics

SOCIEDAD ARGENTINA DE GENÉTICA

Lugar: Buenos Aires; Año: 2022

1666-0390

Zephyranhtes citrina is an ornamental American bulbous plant used as an ornamentalgarden crop for its aesthetic qualities of the yellow corolla. The objective of this workwas to characterize the species by classical chromosome staining and fluorochromebanding. The species was octoploid with 2n = 8x = 48 chromosomes. The karyotype isformed by 20 m + 26 sm + 2 st. Satellites were observed in the short arm of metacentricchromosomes 8, 9, 11 and 12, which colocalized with of constitutive heterochromatinCMA+ /DAPI-/0 bands. The karyotype comprises chromosomal pairs and alsoheteromophic chromosome groups of variable number indicating that it is anallooctoploid. These results will be used as a tool for genetic improvement monitoring,in interspecific crosses analyses and in biotechnological procedures by in vitro culture.