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Related Concept Videos

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Recombinant DNA technology called transgenesis is often used to add a foreign gene or remove a detrimental gene from an organism. Such genetically modified organisms are called transgenic organisms.
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Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
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An Efficient Modular Gateway Recombinase-Based Gene Stacking System for Generating Multi-Trait Transgenic Plants.

Guannan Qin1,2,3, Suting Wu2, Liying Zhang2

  • 1Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China.

Plants (Basel, Switzerland)
|February 26, 2022
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Summary
This summary is machine-generated.

A new GuanNan Stacking (GNS) system enables efficient in vitro gene stacking for plant synthetic biology. This powerful tool facilitates the construction of complex multigene vectors for improved crop traits.

Keywords:
gateway recombinationgolden gate cloningmodularmulti-transgene stackingplants

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Area of Science:

  • Plant Synthetic Biology
  • Molecular Biology
  • Biotechnology

Background:

  • Transgenic technology is crucial for plant genetic improvement, but constructing multigene expression cassettes remains challenging.
  • Existing vector assembly systems are not fully optimized for complex metabolic pathway modifications and pyramiding breeding strategies.

Purpose of the Study:

  • To develop a novel in vitro gene stacking system, GuanNan Stacking (GNS), for efficient construction of multigene expression cassettes.
  • To overcome limitations in current methods for assembling multiple genes into plant transformation vectors.

Main Methods:

  • Utilized Type IIS restriction enzyme-mediated Golden Gate cloning for modular assembly of gene expression cassettes.
  • Incorporated Gateway recombination for cloning superlarge transgene expression cassettes and simultaneous assembly in binary vectors.
  • Implemented a Cre enzyme-mediated marker deletion mechanism and a linked dual positive-negative marker selection strategy.

Main Results:

  • Developed the GuanNan Stacking (GNS) system for standardized, modular assembly of gene expression cassettes.
  • Successfully cloned and assembled superlarge transgene expression cassettes and multiple cassettes into a binary vector.
  • Demonstrated efficient acquisition of target recombinant plasmids without prokaryotic selection markers in the T-DNA region.
  • Enabled cloning and transfer of large T-DNAs (>100 kb) using a host-independent negative selection marker and TAC backbone.

Conclusions:

  • The GuanNan Stacking (GNS) system is a powerful tool for plant metabolic engineering and the breeding of transgenic crops with compound traits.
  • Successfully constructed a binary vector with five foreign gene expression cassettes and generated transgenic rice with desired traits.
  • The developed system significantly advances the efficiency and capability of multigene engineering in plants.