Species identification of <Emphasis Type="Italic">Pinctada imbricata</Emphasis> using intergenic spacer of nuclear ribosomal RNA genes and mitochondrial 16S ribosomal RNA gene regions |
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| Authors: | Email author" target="_blank">Tetsuji?MasaokaEmail author Takanori?Kobayashi |
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| Institution: | National Research Institute of Aquaculture, Tamaki, Mie 519-0423 and;National Research Institute of Fisheries Science, Yokohama, Kanagawa 236-8648, Japan |
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| Abstract: | ABSTRACT: For pearl production, pearl oyster seeds from foreign pearl oysters as well as hybrids between native and such foreign pearl oysters are produced in Japanese hatcheries. However, it is very difficult to identify these pearl oysters and hybrids based on morphological measurements. Thus, a molecular identification method for distinguishing Atlantic pearl oysters Pinctada imbricata from the Indian-Pacific pearl oyster group including P. martensii and P. fucata , was developed. The polymerase chain reaction (PCR) products of the partial intergenic spacer (IGS) of nuclear ribosomal RNA (rRNA) genes exhibited length polymorphism between P. imbricata (590 bp) and the other two species (427 bp). The restriction fragment length polymorphism analysis of the PCR products (PCR-RFLP) cleaved with Mse I observed in the IGS of nuclear rRNA genes also gave different profiles between P. imbricata and the other two species. The difference in PCR-RFLP using Alu I was also detected in the mitochondrial 16S rRNA gene regions between P. imbricata and the other two species. Thus, the method developed enables the distinction of P. imbricata from P. martensii and P. fucata . |
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| Keywords: | intergenic spacer of nuclear ribosomal RNA genes mitochondrial 16S ribosomal RNA gene Pinctada fucata Pinctada imbricata polymerase chain reaction Pinctada martensii restriction fragment length polymorphism species identification |
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