Micropropagación de dos variedades ecuatorianas de yuca (Manihot esculenta CRANTZ)
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E. E. Portoviejo
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9 p.
Abstract
Se investigaron las condiciones esenciales para la micropropagación in vitro de las variedades
ecuatorianas de yuca INIAP Portoviejo 650 e INIAP Portoviejo 651. Se plantó un banco de donantes
con estacas de plantas vigorosas y sanas. En las etapas in vitro se empleó el medio de Murashige y
Skoog (MS). En el establecimiento se adicionó Amoxicilina 500® y se evaluó la supervivencia de los
explantes y la contaminación. En la multiplicación se utilizó 0,50 mg L-1 de 6-bencilaminopurina (6-
BAP) + 0,30-0,50 mg L-1 de ácido giberélico (GA3
) y se evaluó la longitud de las plantas, el diámetro
del tallo, el número de brotes y el número de hojas. Para el enraizamiento se empleó 1 mg L-1 de
ácido naftalenacético (ANA) + 0,01 mg L-1 de ácido giberélico (GA3
), y se evaluó la longitud de las
plantas, el diámetro del tallo, el número de raíces y la longitud de las raíces. En la aclimatación se
evaluó la longitud de la planta, el diámetro del tallo, el número de brotes por planta y el número
de hojas por planta. Se logró 100% de supervivencia en el establecimiento. En la multiplicación y
el enraizamiento se observaron interacciones significativas variedad x medio de cultivo, atribuibles
al balance entre las fitohormonas presentes en los tejidos vegetales y los reguladores adicionados al
medio. Se alcanzaron altos porcentajes de aclimatación (83-87%). Se logró determinar las condiciones
esenciales para micropropagar estas variedades de yuca, y se recomiendan estudios más profundos
para estandarizar protocolos con vistas a su multiplicación masiva como vía de entrega de propágulos
a los agricultores.
The essential conditions for the in vitro micropropagation of the Ecuadorian cassava varieties INIAP Portoviejo 650 and INIAP Portoviejo 651 were studied. A donor bank consisting of cuttings taken from vigorous, healthy plants was planted. In the in vitro stages, the medium of Murashige and Skoog (MS) was used. Amoxicillin 500® was added to the establishment and the survival of explants and contamination was evaluated. In multiplication, 0.50 mg L-1 of 6-benzylaminopurine (6-BAP) + 0.30-0.50 mg L-1 of gibberellic acid (GA3 ) were used; plant height, stem diameter, and the number of shoots and leaves were evaluated. For rooting, 1 mg L-1 naphthalene acetic acid (ANA) + 0.01 mg L-1 gibberellic acid (GA3 ) was used; the parameters evaluated were plant height, stem diameter, number of roots and root length. During acclimatization, plant height, stem diameter, https://doi.org/10.29393/CHJAAS36-21MDLC80022 Corozo, L. et al. Micropropagación de dos variedades de yuca ecuatorianas. 225 and the number of shoots and leaves per plant were assessed. 100% survival was achieved in the establishment. In the multiplication and rooting, significant interactions were observed variety x culture medium, attributable to the balance between the phytohormones present in the plant tissues and the regulators added to the medium. High percentages of acclimatization were reached (83-87%). It was possible to determine the essential conditions for micropropagation of these cassava varieties, but more in-depth studies are recommended to standardize protocols with a view to their mass multiplication as a means of delivering propagules to farmers
The essential conditions for the in vitro micropropagation of the Ecuadorian cassava varieties INIAP Portoviejo 650 and INIAP Portoviejo 651 were studied. A donor bank consisting of cuttings taken from vigorous, healthy plants was planted. In the in vitro stages, the medium of Murashige and Skoog (MS) was used. Amoxicillin 500® was added to the establishment and the survival of explants and contamination was evaluated. In multiplication, 0.50 mg L-1 of 6-benzylaminopurine (6-BAP) + 0.30-0.50 mg L-1 of gibberellic acid (GA3 ) were used; plant height, stem diameter, and the number of shoots and leaves were evaluated. For rooting, 1 mg L-1 naphthalene acetic acid (ANA) + 0.01 mg L-1 gibberellic acid (GA3 ) was used; the parameters evaluated were plant height, stem diameter, number of roots and root length. During acclimatization, plant height, stem diameter, https://doi.org/10.29393/CHJAAS36-21MDLC80022 Corozo, L. et al. Micropropagación de dos variedades de yuca ecuatorianas. 225 and the number of shoots and leaves per plant were assessed. 100% survival was achieved in the establishment. In the multiplication and rooting, significant interactions were observed variety x culture medium, attributable to the balance between the phytohormones present in the plant tissues and the regulators added to the medium. High percentages of acclimatization were reached (83-87%). It was possible to determine the essential conditions for micropropagation of these cassava varieties, but more in-depth studies are recommended to standardize protocols with a view to their mass multiplication as a means of delivering propagules to farmers