Many rat strains have been employed in the genetic study of quantitative traits such as blood pressure. In such genetic studies, it is essential to prepare rat genetic maps fine enough to identify the genes regulating quantitative traits. However, it is not an easy task to isolate a sufficient number of genetic markers polymorphic between a particular pair of rat strains. In this study, we applied the randomly amplified microsatellite polymorphism (RAMP) method, a simple method to identify co-dominant markers (Wu et al. Nucleic Acids Res 22, 3257, 1994), to isolate markers polymorphic between the stroke-prone spontaneously hypertensive rat and the Wistar-Kyoto rat, a genetically hypertensive strain and its normotensive control strain, which share a common genetic background. We successfully identified 111 RAMP markers distributed throughout the rat genome after screening 3046 sets of primers. We also showed that we could isolate ordinary simple-sequence-length-polymorphism markers by cloning RAMP markers. The RAMP method is a simple and efficient way to identify co-dominant genetic markers on mammalian genomes.
Mammalian Genome – Springer Journals
Published: Jul 1, 1998
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