大象传媒

Plant and animal breedingGenetic technology

Scientists and farmers use selective breeding to improve the characteristics of plants and animals. This includes genetic sequencing - a process which allows scientists to determine the precise sequence of DNA nucleotides for a living organism.

Part of BiologySustainability and interdependence

Genetic technology

Genetic sequencing is a process which allows scientists to determine the precise sequence of DNA nucleotides for a living organism.

A photo of colonies in a petri dish for cloning of transgenic vector into plasmid DNA

This technology can be used to identify organisms that possess the allele for desired characteristics, for example disease resistance. These organisms can then be used within breeding programmes to try and incorporate the desired characteristic into new cultivars.

Single genes for desirable characteristics that have been identified through genetic sequencing can also be inserted into the genomes of crop plants creating genetically modified plants with improved characteristics.

Some breeding programmes involve using crop plants that have been genetically modified using recombinant DNA technology. For example, inserting the Bt toxin gene into plants will result in the genetically modified plants having pest resistance. The glyphosate resistance gene can be inserted to give the genetically modified plants herbicide tolerance.

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