Historical Technology Developments in Plant Transformation

Book Series: Plant Transformation Technology Revolution in Last Three Decades


Yinghui Dan

DOI: 10.2174/97816080524861110101
eISBN: 978-1-60805-248-6, 2011
ISBN: 978-1-60805-532-6
ISSN: 2211-2936 (Print)

Indexed in: Chemical Abstracts, EBSCO.

Plant transformation technology has played a critical role in advancing biotechnology and fundamental research and evolved as a scienc...[view complete introduction]
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Chimeric Genes for Selection Systems and Reporter Makers

- Pp. 25-45 (21)

Morten Joersbo


Genetic transformation of plants cells is generally challenged by low gene transfer frequencies. As a result, means to select transgenic cells over a majority of non-transgenic cells after transformation are important. This can be accomplished by employing a suitable selection system. In the past, selection systems used for plants were predominantly based on antibiotics and herbicides. These conventional selection systems alleviate the toxicity of the selective agents (such as kanamycin, hygromycin or phosphinothricin) in the transgenic cells while killing the non-transgenic cells. However, in many cases, it has proven to be a better selection strategy to employ selective agents (such as mannose) that provide the transgenic cells a metabolic advantage while only starving but not actively killing the non-transgenic cells. This group, often referred to as positive selection systems, should be termed positive conditional-promotive selection systems, according to the selection system classification, with a new addendum. Here, selection systems for the production of transgenic plants are reviewed since the production of the first transgenic plant in 1983, with emphasis on recent developments. </p> <p> Moreover, useful visual marker genes such as β–glucuronidase and green fluorescent protein are also described as they have been of substantial aid for the development of the most valuable selection methods as well as for the study of transgene expression and regulatory sequences.

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