INVESTIGADORES
HONFI Ana Isabel
congresos y reuniones científicas
Título:
OBTENCIÓN DE BULBILLOS MIXOPLOIDES POR INDUCCIÓN ARTIFICIAL DE POLIPLOIDÍA EN HIP PEASTRUM STRIATUM (LAM.) H.E. MOORE (AMARYLLIDACEAE).
Autor/es:
RODRIGUEZ MATA ORLANDO; HONFI ANA I.; DAVIÑA JULIO R.
Lugar:
SAN MIGUEL DE TUCUMAN
Reunión:
Congreso; XXXVII JORNADAS ARGENTINAS DE BOTANICA; 2019
Institución organizadora:
SOCIEDAD ARGENTINA DE BOTANICA
Resumen:
Colchicine is a polyploidizing agent widely used in plant breeding plans. Hippeastrum is a genus of the Amaryllidaceae native to America with great ornamental potential and as a source of phytoproducts. The records of synthetic polyploid trials in this family are scarce and of low survival. The objective ofthis research was to evaluate the synthetic polyploidization of H. striatum (2n=5x=55) from Misiones - Argentina (OR18MNES ). An experimental design was established with two bulb groups (treatment and untre ated). The 30 days old bulbs were immersed in an aqueous solution of 0.1% colchicine for 24 hours. Then, they were cultured in the same conditions as the controls. Six months later, the Feulgen staining technique was used for the mitotic analysis using root tips of the treated and untreated bulbs. The clonal progeny of these bulbs was also analyzed. The coexistence of pentaploid (2n = 5x = 55) and decaploids cell lines (2n = 10x = 110) in the treated bulbs was revealed. The plants havenot yet reached the reproductive stage, but the prolifi c vegetative production of bulbils is highlighted. These bulbils have the same cytogenetic phenomenon. Mixoploidy is a chromosomal disorder characterized by the presence of two or more cell lines in the same individual. This can be presented as a cytogenetictrouble that concludes in the infeasibility of the affected individuals, but when thi condition is transmitted to the next generation through the agamic mode, it can become a valuable strategy that expands the possibilities in genetic improvement plans.