Abstract
The dramatic development of molecular genetics has laid the groundwork for genomics. It has introduced new generations of molecular markers for use in the genetic improvement of farm animals. These markers provide more accurate genetic information and better understanding of the animal genetic resources. Scientists, unfamiliar with the different molecular techniques tend to get lost as each has its own advantages and disadvantages. This review represents a trail to shade alight on the different types of molecular markers by introducing a brief summary on the development of genetic markers including both the classical genetic markers and more advanced DNA-based molecular markers. This review could be helpful to better understand the characteristics of different genetic markers and the genetic diversity of animal genetic resources.
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