The application of marker-assisted breeding technology for the genetic investigations of the cereal crops, which include wheat, rice and corn, is discussed. The bacterial DNA is used to transfer selected genes and thus to create genetically modified crops. In the marker-assisted breeding technology, genetic marker is used for the breeding of crops. A gene is transferred into a plant recipient plant using transformation techniques, but they do not allow scientists to specify where in the receipient organism's genome a new gene is inserted. A homologous recombination was process for rice and a related process for corn is used to replace alleles in corn.
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