Rooting in Km selective media as efficient in vitro selection method for sunflower genetic transformation

Despite of numerous publications in sunflower genetic transformation, there is no efficient or reproducible protocol with low number of escapes. The latter would indicate that the selection method is not effective. In this work we used Km as selective agent, Agrobacterium tumefaciens EHA105 strain a...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Radonic,Laura Mabel, Zimmermann,Julián Marcos, Zavallo,Diego, López,Nilda, López Bilbao,Marisa
Lenguaje:English
Publicado: Pontificia Universidad Católica de Valparaíso 2006
Materias:
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300027
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:scielo:S0717-34582006000300027
record_format dspace
spelling oai:scielo:S0717-345820060003000272007-01-17Rooting in Km selective media as efficient in vitro selection method for sunflower genetic transformationRadonic,Laura MabelZimmermann,Julián MarcosZavallo,DiegoLópez,NildaLópez Bilbao,Marisa genetic transformation kanamycin selection sunflower Despite of numerous publications in sunflower genetic transformation, there is no efficient or reproducible protocol with low number of escapes. The latter would indicate that the selection method is not effective. In this work we used Km as selective agent, Agrobacterium tumefaciens EHA105 strain and a vector with the nptII gene under the nos promoter and uidA gene under 35S promoter. The response of agroinfected (A) and control (C) explants during the in vitro culture was studied and in both cases in presence or absence of Km in order to assign a differential morphologic response between transformed and non-transformed plants. The characteristics analyzed were: height, colour/aspect of the plantlets, in vitro rooting and in vitro bud-flower development. Selection was applied from the third regeneration media. Among the A plantlets two were capable of rooting, being positive by PCR, whereas the C were unable to root in presence of Km. One of them gave 6 seeds and in these plants, it was determined the presence of the transgene by PCR and GUS staining. This work shows that in Km selection, colour/aspect of shoots is not useful as selection criteria whereas rooting is an effective selection method in which no escapes were obtained.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.9 n.3 20062006-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300027en
institution Scielo Chile
collection Scielo Chile
language English
topic genetic transformation
kanamycin
selection
sunflower
spellingShingle genetic transformation
kanamycin
selection
sunflower
Radonic,Laura Mabel
Zimmermann,Julián Marcos
Zavallo,Diego
López,Nilda
López Bilbao,Marisa
Rooting in Km selective media as efficient in vitro selection method for sunflower genetic transformation
description Despite of numerous publications in sunflower genetic transformation, there is no efficient or reproducible protocol with low number of escapes. The latter would indicate that the selection method is not effective. In this work we used Km as selective agent, Agrobacterium tumefaciens EHA105 strain and a vector with the nptII gene under the nos promoter and uidA gene under 35S promoter. The response of agroinfected (A) and control (C) explants during the in vitro culture was studied and in both cases in presence or absence of Km in order to assign a differential morphologic response between transformed and non-transformed plants. The characteristics analyzed were: height, colour/aspect of the plantlets, in vitro rooting and in vitro bud-flower development. Selection was applied from the third regeneration media. Among the A plantlets two were capable of rooting, being positive by PCR, whereas the C were unable to root in presence of Km. One of them gave 6 seeds and in these plants, it was determined the presence of the transgene by PCR and GUS staining. This work shows that in Km selection, colour/aspect of shoots is not useful as selection criteria whereas rooting is an effective selection method in which no escapes were obtained.
author Radonic,Laura Mabel
Zimmermann,Julián Marcos
Zavallo,Diego
López,Nilda
López Bilbao,Marisa
author_facet Radonic,Laura Mabel
Zimmermann,Julián Marcos
Zavallo,Diego
López,Nilda
López Bilbao,Marisa
author_sort Radonic,Laura Mabel
title Rooting in Km selective media as efficient in vitro selection method for sunflower genetic transformation
title_short Rooting in Km selective media as efficient in vitro selection method for sunflower genetic transformation
title_full Rooting in Km selective media as efficient in vitro selection method for sunflower genetic transformation
title_fullStr Rooting in Km selective media as efficient in vitro selection method for sunflower genetic transformation
title_full_unstemmed Rooting in Km selective media as efficient in vitro selection method for sunflower genetic transformation
title_sort rooting in km selective media as efficient in vitro selection method for sunflower genetic transformation
publisher Pontificia Universidad Católica de Valparaíso
publishDate 2006
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300027
work_keys_str_mv AT radoniclauramabel rootinginkmselectivemediaasefficientinvitroselectionmethodforsunflowergenetictransformation
AT zimmermannjulianmarcos rootinginkmselectivemediaasefficientinvitroselectionmethodforsunflowergenetictransformation
AT zavallodiego rootinginkmselectivemediaasefficientinvitroselectionmethodforsunflowergenetictransformation
AT lopeznilda rootinginkmselectivemediaasefficientinvitroselectionmethodforsunflowergenetictransformation
AT lopezbilbaomarisa rootinginkmselectivemediaasefficientinvitroselectionmethodforsunflowergenetictransformation
_version_ 1718441751421648896