Genetic marker genes refer to genes used as markers in genetic analysis, also known as marker genes. It is often used to determine recombinant and parental types in recombination experiments. Its function may not be very clear, but the mutant character is clear, so it is easy to determine. Although genes related to biochemical traits are often used for microorganisms, genes related to morphological traits are often used for higher organisms. Centromere is also used as genetic marker. In microbial genetics, genetic markers are also divided into selective markers (or selective genes) and non selective markers (or selective genes). [1]
For the purpose of identification and detection, the marker (such as radioisotope, fluorescein or enzyme) is covalently linked to another compound to form a multicomponent complex through the specific reaction between the labeled compound and the substance to be detected. After separation from the unconjugated marker, the substance to be detected can be identified and detected by a simpler method. The inheritance of markers can be detected. Markers can be parts of chromosomes that have expression functions (such as genes), or parts that do not have protein coding functions but whose genetic characteristics can be detected.
