ABSTRACT. The aim of this study was to determine the imprinting status of the Ras protein-specific guanine nucleotide-releasing factor 1 (Rasgrf1) gene in domestic pigs. In this study, a 228-bp partial sequence located in exon 14 and a 193-bp partial sequence located in exon 1 of the Rasgrf1 gene in domestic pigs were obtained. A novel single nucleotide polymorphism, a G/A transition, was identified in Rasgrf1 exon 14, and then the reciprocal Berkshire x Wannan black F1 hybrid model and the reverse transcription-polymerase chain reaction-restriction fragment length polymorphism method were used to detect the imprinting status of the porcine Rasgrf1 gene at the 1-day-old developmental stage.
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