Abstract

PAPONE, Mirta; MASCARINI, Alba  and  FATTA, Nora. A Digitalis purpurea elite population starting from a population grown wild. BAG, J. basic appl. genet. [online]. 2008, vol.19, n.1, pp.21-25. ISSN 1852-6233.

D.purpurea is grown in cold areas with long days. In the Buenos Aires province market it is absent, probably because it is a complicated and expensive crop. The horticultural growers prefer the imported costly hybrid seed because plants flower without suplementary light or cold. The objectives of the experiments which were laid out were to find, among the individuals of a population grown wild, genotypes that responded to the Buenos Aires conditions, producing plants induced in pots and assesing if there was response to natural aggregates. Seed harvested in Bariloche was sown on the 29/05/o4. The plants were transplanted to 3 liter pots. 30 pots were placed in greenhouse and treated with chemical fertilization. 54 pots were placed outdoors in the sun and received foliar treatments with different concentrations of an alcoholic solution of Echinacea purpurea. 23 pots were placed outdoors in a semi sunny setting irrigated with an infusion of Equisetum giganteum . 15 greenhouse plants were planted in the ground outdoors. Other 15 were moved to sunny outdoors rather late. Flowering began in October 2005 in plants which were on the ground and one month later in those treated with natural preparations. The rest of the plants did not flower. Spring genotypes were detected, able to flower with the hours of cold and light of Buenos Aires, these behave as an elite population. This could be the starting point for a genetical improvement plan of which the final product could compete with the imported seed. The natural aggregates could complement traditional fertilization.

Keywords : Photoperiod; Vernalization; Natural fertilizer; Seed.

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