Use of molecular markers in studying genetic diversity of plants.There are currently applying molecular markers (molecular marker), which is a powerful sign that play an important role in agriculture, especially in improving plants, which are considered new plants in key and can be used to check the level of the genes and DNA-level to.ช้ใน to split the species, including the genetic relationship between the known varieties, because the comparison features. In addition to not be able to distinguish certain types of plants that are genetically closer. Therefore it is necessary to find other types of indicators assembled to help the distinction of species with accuracy. It has developed a protein marker (marker protein) like I sai solutions (isozyme) to help you identify the difference of plants (varietal identification), using the difference of protein molecules that are validated element (2546 (2003) suri, a blessing), but found that the protein has an important limitation is required.Loop checking, there are also genes and genes that bring education needs to be expressed (gene expression) by auditing thus need to select the plant tissue and the growth of appropriate plants. In addition to the audit results also depend on the environment. Performance in distinguishing between organisms is reduced (konkot, 2550 (2007)) From these constraints make development a new technique is a technique for RFLP (restriction fragment length polymer phism) based on the difference of the size of DNA caused by cutting with specific cutting enzyme (restriction enzyme) to differentiate the DNA directly. Therefore, there is no influence of environment to come. The verification result is precise and can repeat the same results. However, this technique has limitations is a complex and difficult process is time consuming, as well as the labour and expense of high action. DNA used to have plenty of and purification (Kaundun et al., 2000) later it has developed a way to increase the quantity of DNA by r PC techniques (polymerase chain reaction: PCR), which is a quick and easy technique. Can be added to the target DNA quantity large quantity in a short period. On the basis of DNA polymerase enzyme then develop new molecular markers increase as technique RAPD (random amplified polymorphic DNA: RAPD) technique a FL p (amplification fragment length polymorphism AFLP: a) the micro-transaction lalai cottage (microsatellite) or SS r (SSR marker) (2546 (2003) suri, blessings), so can be used to resolve the differences between the species, and can recognize differences within varieties. The use of molecular markers in the selection and distinguish of the appearance of each species. With precision. Quick and easy and can be genetic characterization of genes of interest.
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